HomeMy WebLinkAbout1.22 SWMPStormwater Management Plan
PDC Energy
Piceance Centralized Soil Treatment Facility
OLSSON
ASSOCIATES
OA Project No. 011 -2627
760 Horizon Drive, Suite 102 1 Grand Junction, CO 81506 1 TEL 970.263.7800 1 FAX 970.263.7456
STORMWATER MANAGEMENT PLAN
FOR CONSTRUCTION ACTIVITIES
Piceance Centralized
Soil Treatment Facility
Garfield County, Colorado
Prepared For:
ItPDC � EEGY
PDC Energy, Inc.
1775 Sherman Street, Suite 3000
Denver, Colorado 80203
Prepared by:
ONOLSSON
ASSOCIATES
Olsson Associates
760 Horizon Drive, Suite 102
Grand Junction, Colorado 81506
Project # 011 -2618
February 2012
Revisions:
December 2012
January 2013
PDC Energy, Inc., Certification
Stormwater Management Plan for
Piceance Centralized Soil Treatment Facility
Garfield County, Colorado
Olsson Associates has prepared this Stormwater Management Plan for Construction Activities
for PDC Energy, Inc. for the Piceance Centralized Soil Treatment Facility located in
unincorporated Garfield County, Colorado.
"I certify under penalty of law, that this document and all attachments were prepared under my
direction or supervision in accordance with a system designed to assure that qualified personnel
properly gather and evaluate the information submitted. Based on my inquiry of the person or
persons who manage the system, or those persons directly responsible for gathering the
information, the information submitted is, to the best of my knowledge and belief, true, accurate,
and complete. I am aware that there are significant penalties for submitting false information,
including the possibility of fine and imprisonment for knowing violations."
Signature:
Name:
Title:
Date:
Mr. Scott Reasoner
Vice President — Western Operations
Table of Contents
INTRODUCTION 3
Stormwater Runoff Permitting Requirements 3
Project Description 3
1. CONSTRUCTION SITE DESCRIPTION 4
1.A Nature of Construction Activity 4
1.B Sequence of Construction Activities 4
1.0 Estimate of Total Area of Site and Area to be Disturbed 5
1.D Soil Data and Erosion Potential 5
1.E Vegetation Description and Estimate 6
1.F Potential Pollution Sources and Locations 6
1.G Non - Stormwater Discharges 6
1.H Receiving Waters 6
2. SITE MAP(S) 6
2. A Construction Site Boundaries 6
2. B Areas of Ground Disturbance 6
2. C Areas of Cut and Fill 7
2. D Storage Areas 7
2. E Location of Asphalt and Concrete Batch Plants 7
2. F Locations of Structural BMPs 7
2. G Locations of Non - Structural BMPs 7
2. H Locations of Springs, Wetlands and Other Surface Waters 7
3. STORMWATER MANAGEMENT CONTROLS 7
3.A Stormwater Administrator 7
3.B Potential Pollution Sources 7
3.0 BMPs for Stormwater Pollution Prevention 8
3.C.1 Structural Practices 9
3.C.2 Non - Structural Practices 9
3.C.3 Phased BMP Installation 9
3.C.4 Materials Handling and Spill Prevention 10
3.C.5 Dedicated Asphalt or Concrete Batch Plants 11
3.C.6 Vehicle Tracking 11
3.C.7 Waste Management and Disposal, Concrete Washout 11
3.C.8 Ground Water and Stormwater Dewatering 12
4. FINAL STABILIZATION AND LONG TERM STORMWATER MANAGEMENT 12
5. INSPECTIONS AND MAINTENANCE PROCEDURES 14
PDC Energy, Inc. i Olsson Associates
Land Farm SWMP
ADMINISTRATIVE LOG
PDC PCSTF (LAND FARM)
GARFIELD COUNTY, COLORADO
Date
Training, SWMP Revisions or Updates
Comments
Dec -2012
SWMP updates throughout
Fixed SWMP date; added cert #, certification, & continuation letter; revised
introduction; removed plans for storage tanks & tractor on site; updated fence
height on site map
Jan -2013
SWMP update
Changed name from "Petroleum Development Corporation" to "PDC Energy,
Inc.," updated SWMP administrators, added document(s) to Appendix A.
PDC Energy, Inc., Certification
Stormwater Management Plan for
Piceance Centralized Soil Treatment Facility
Garfield County, Colorado
Olsson Associates has prepared this Stormwater Management Plan for Construction Activities
for PDC Energy, Inc. for the Piceance Centralized Soil Treatment Facility located in
unincorporated Garfield County, Colorado.
"I certify under penalty of law, that this document and all attachments were prepared under my
direction or supervision in accordance with a system designed to assure that qualified personnel
properly gather and evaluate the information submitted. Based on my inquiry of the person or
persons who manage the system, or those persons directly responsible for gathering the
information, the information submitted is, to the best of my knowledge and belief, true, accurate,
and complete. I am aware that there are significant penalties for submitting false information,
including the possibility of fine and imprisonment for knowing violations."
Signature:
Name:
Title:
Date:
Mr. Scott Reasoner
Vice President — Western Operations
Table of Contents
INTRODUCTION 3
Stormwater Runoff Permitting Requirements 3
Project Description 3
1. CONSTRUCTION SITE DESCRIPTION 4
1.A Nature of Construction Activity 4
1.B Sequence of Construction Activities 4
1.0 Estimate of Total Area of Site and Area to be Disturbed 5
1.D Soil Data and Erosion Potential 5
1.E Vegetation Description and Estimate 6
1.F Potential Pollution Sources and Locations 6
1.G Non - Stormwater Discharges 6
1.H Receiving Waters 6
2. SITE MAP(S) 6
2. A Construction Site Boundaries 6
2. B Areas of Ground Disturbance 6
2. C Areas of Cut and Fill 7
2. D Storage Areas 7
2. E Location of Asphalt and Concrete Batch Plants 7
2. F Locations of Structural BMPs 7
2. G Locations of Non - Structural BMPs 7
2. H Locations of Springs, Wetlands and Other Surface Waters 7
3. STORMWATER MANAGEMENT CONTROLS 7
3.A Stormwater Administrator 7
3.B Potential Pollution Sources 7
3.0 BMPs for Stormwater Pollution Prevention 8
3.C.1 Structural Practices 9
3.C.2 Non - Structural Practices 9
3.C.3 Phased BMP Installation 9
3.C.4 Materials Handling and Spill Prevention 10
3.C.5 Dedicated Asphalt or Concrete Batch Plants 11
3.C.6 Vehicle Tracking 11
3.C.7 Waste Management and Disposal, Concrete Washout 11
3.C.8 Ground Water and Stormwater Dewatering 12
4. FINAL STABILIZATION AND LONG TERM STORMWATER MANAGEMENT 12
5. INSPECTIONS AND MAINTENANCE PROCEDURES 14
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LIST OF TABLES
Table 1
Table 2
Table 3
Soils Data and Erosion Potential
BMP Phasing
Typical Seed Mixture
LIST OF FIGURES
Figure 1
Figure 2
Permitted Area Location Map
Receiving Waters Location Map
LIST OF APPENDICES
Appendix A Certification: COR- 031735, General Permit: COR- 030000, and Related
Documentation
Appendix B Natural Resources Conservation Services (NRCS) Unit Map & Soils Description
Appendix C Site Map
Appendix D Best Management Practice (BMP) Manual
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INTRODUCTION
This Stormwater Management Plan (SWMP) for Construction Activities is written to comply with
the Colorado Department of Public Health and Environment (CDPHE)'s General Permit No.
COR- 030000, issued on July 1, 2007 and administratively continued on June 30, 2012 to
remain in effect until the new permit being developed by the Water Quality Control Division is
issued and effective, and with related U.S. Environmental Protection Agency (USEPA) National
Pollutant Discharge Elimination System (NPDES) stormwater regulations. This SWMP
addresses construction activities associated with PDC Energy, Inc. (PDC)'s oil and gas land
farming activities at the Piceance Centralized Soil Treatment Facility (Land Farm), in Garfield
County. A copy of the certification to discharge (COR- 031735), the Colorado Discharge Permit
System (CDPS) general permit (COR- 030000), and any related documentation can be found in
Appendix A.
This SWMP is intended to be revised as necessary to address planned developments, new
disturbances, and other changes required to manage stormwater and protect surface water
quality. These changes shall be documented in the Administrative Log located at the front of
this document.
Stormwater Runoff Permitting Requirements
The Federal Clean Water Act [Section 402(p)] requires that discharges of pollutants to waters of
the U.S. from any point source be regulated by NPDES permits. In November 1990 the EPA
published final regulations that established application requirements for stormwater associated
with construction activity for soil disturbances of 5 acres or more be regulated as an industrial
activity and covered by an NPDES permit. In December 1999 the EPA published final Phase II
NPDES regulations that established application requirements for stormwater associated with
construction activity for soil disturbances to be regulated as an industrial activity and covered by
an NPDES permit. These regulations became effective July 1, 2002.
On June 30, 2005, Colorado stormwater regulations went into effect to require CDPS permits for
stormwater discharges from construction activities for oil and gas activities (1 acre or greater).
Federal permit coverage for these discharges was conditionally exempted from the Federal
Clean Water Act by the 2005 Federal Energy Bill. On February 1, 2006, the CDPHE issued a
letter clarifying that the CDPHE Water Quality Control Commission decided to maintain the
existing requirements for stormwater permitting for oil and gas construction sites greater than 1
acre.
Project Description
The Land Farm will be located in the southwest quarter of Section 25, Township 6 South, Range
95 West, in Garfield County, Colorado. The proposed facility will be located approximately 0.25
miles north of Interstate Highway 70 on parcel number 2173 - 352 -00 -016. According to the
Garfield County Land Use tables, this facility would be categorized as Materials Handling in the
Resource Lands — Gentle Slopes region. Access to the facility will be via a private road. The
private road will be utilized via an existing permitted access that intersects with US Highway 6 &
24 approximately 3.25 miles northeast of the town of Parachute. See Figure 1 for the Permit
Area Location Map.
The current development plan includes Land Farm/ access road construction. The permitted
area is approximately 25 acres.
The purpose of the facility will be to remediate hydrocarbon impacted soils and store these soils
temporarily following treatment prior to their beneficial reuse at other PDC locations. PDC will
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Land Farm SWMP
transport impacted soils to the proposed facility on an "as- needed" basis. Operation of the
facility will be dependent upon the frequency and volume that contaminated soils are generated
by PDC's ongoing natural gas production operations. The soils that will be remediated at the
proposed facility will be under the jurisdiction of the Colorado Oil and Gas Conservation
Commission (COGCC). This facility will be considered a Centralized E &P Waste Management
Facility permitted and regulated in accordance with COGCC Rule 908.
1. CONSTRUCTION SITE DESCRIPTION
The following section provides a description of the construction activities.
1.A Nature of Construction Activity
The Land Farm will be constructed using conventional cut and fill earthmoving techniques. The
total estimated disturbance for the proposed pad and access is approximately 10 acres.
In areas that are disturbed by construction, topsoil will be stripped and stockpiled near the site.
All brush, limbs, and other woody material will be stockpiled separately from the topsoil. Soil
materials will be managed so that erosion and sediment transport are minimized. Nearby
drainages will be protected by appropriate measures.
1.B Sequence of Construction Activities
The activities will generally be accomplished in four work phases. They include Access Road
and Pad Construction, Land Farming, Interim Reclamation, and Final Reclamation. Each work
phase, along with its potential pollution sources, is briefly discussed below.
Access Road and Pad Construction
Along with construction of the Land Farm site, an approximately 130 -foot access road will be
built for site access off of the existing road. Pad and access road construction will be performed
using traditional cut and fill construction.
Basic construction activities that are conducted during this phase include clearing and grubbing,
segregation of topsoil for use in reclamation, grading and excavation, compaction of pad, final
grading and contouring, and installation of surfacing materials such as gravel. To the extent
possible, BMPs that will be utilized to control stormwater throughout the life of the facility will be
constructed during this phase.
Sediment discharge is the main potential pollutant of concern during access road and pad
construction. No chemicals or fuels will be stored on site during this phase; however, attention
will be paid to the potential for leaks that might occur during the use of construction equipment.
Land Farming
The Land Farming phase will involve the controlled and repeated application of drilling wastes to
the soil surface. Microorganisms that are already present in the soil and that are added to the
soil will be used to naturally biodegrade hydrocarbon constituents, dilute and attenuate metals,
and transform and assimilate waste constituents. Water will be used to facilitate the application
of the microbes. The process may also involve periodic tillage of the mixture to increase
aeration, and the application of additional amendments such as nutrients or mulches to increase
the biological activity and aeration of the soil. These practices can prevent the development of
conditions that might promote leaching and mobilization of inorganic contaminants. During
periods of extended dry conditions, moisture control may also be needed to minimize dust.
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Sediment, hydrocarbons or hydrocarbon impacted soils, and small amounts of equipment
lubricant and fuel are potential pollutants of concern during this phase.
Interim Reclamation
Any disturbed areas not needed for the ongoing operation of the land farm will be contoured to
match the surrounding terrain (where and if possible), cross - ripped (if previously compacted),
spread with stockpiled topsoil, and re- vegetated. Drive paths will be maintained in such a way
as to minimize dust and erosion.
Sediment discharge and small amounts of equipment lubricant or fuel are potential pollutants of
concern during this phase of construction.
Permit coverage may be inactivated for oil and gas construction sites even if stabilized unpaved
surfaces exist and /or disturbed land that has been restored to cropland remains non - vegetated,
as long as construction activities have been completed and all other disturbed areas are re-
vegetated.
Final Reclamation
PDC estimates that the proposed facility will be in operation for a period of approximately
twenty -five (25) years during development and production of PDC's Garfield County operations.
Upon termination of the development and production activities, the project area will be
reclaimed.
Final Reclamation will involve the removal of all equipment and structures, the removal of all
safety and stormwater BMPs and other surface objects, re- contouring the site to pre - facility
grades, re- distributing the stockpiled topsoil across the site and revegetating all areas.
Sediment discharge and small amounts of equipment lubricant and fuel are potential pollutants
of concern during this phase of construction.
1.0 Estimate of Total Area of Site and Area to be Disturbed
The total permitted area is 25 acres. The total disturbance area of the proposed site within the
permitted area is approximately 10 acres. This includes the Land Farm pad and access. If the
disturbance area is expanded, the SWMP will be updated to reflect the new the disturbance
area.
1.D Soil Data and Erosion Potential
Runoff characteristics are based primarily on site topography, soil type, and vegetative cover.
The soil type at the Land Farm is Nihill channery loam, 6 to 25 percent slopes. The two soil
types in the permitted area are well drained soils with a low to moderate ( -3.6 inches to -8.0
inches) water holding capacity. A Natural Resources Conservation Services (NRCS) unit map
and soils description for the dominant soils in the permitted area is provided in Appendix B.
The K- factor approximates soil detachment due to runoff and raindrop impact. Lower k- Factor
values (0.1 - 0.17) indicate less susceptibility to sheet and rill erosion, while higher k- Factor
values ( >0.30) indicate greater susceptibility to erosion.
The Hydrologic Group describes soil and soil units with the potential for runoff under similar
storm and cover conditions. Group A has a high infiltration rate and a corresponding lower
potential for runoff, while Group D has low infiltration rates due to finer soil texture or a high
water table, giving them a high potential for runoff.
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The average annual precipitation for the Land Farm is 10 to 15 inches (Western Regional
Climate Center). Table 1 shows the soils data and erosion potential for each soil in the areas
currently under construction or anticipated in the future.
Table 1: Soils Data and Erosion Potential
Representative Value
Soil Name
Hydrologic
Group
K-
factor
% Sand
% Silt
% Clay
Nihill channery loam
Nihill
B
.37
43.0
38.5
18.5
1.E Vegetation Description and Estimate
Native vegetation for the construction area soils includes western wheatgrass, big sagebrush,
bluebunch wheatgrass, Indian ricegrass, needleandthread, and yellow rabbitbrush. Pre -
disturbance ground cover is approximately 60 percent. Field verification of vegetation type and
cover percentage will need to be done when inspections commence, and added to the site -
specific map.
1.F Potential Pollution Sources and Locations
The potential pollution sources for each phase of construction are briefly discussed in Section
1.B Sequence of Construction Activities. They are discussed in more detail in Section 3.B
Potential Pollutant Sources. The locations of all potential pollution sources are shown on the
site - specific map.
1.G Non - Stormwater Discharges
Non - stormwater discharges are not expected from the construction project.
1.H Receiving Waters
The stormwater runoff receiving water for the project area is an ephemeral drainage. The
drainage flows to an intermittent stream immediately before the stream crosses 1 -70 to enter the
Colorado River. Receiving waters are shown in Figure 2 and on the site - specific map.
2. SITE MAP(S)
The site map for the Land Farm will be maintained along with the stormwater inspection reports
in PDC's database. The map will be regularly updated to reflect all changes to the site. The
site map is also included in Appendix C.
2. A Construction Site Boundaries
For an accurate representation of the construction site boundaries, refer to the site - specific
map.
2. B Areas of Ground Disturbance
For an accurate representation of the areas of ground disturbance, refer to the site - specific
map.
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2. C Areas of Cut and Fill
For an accurate representation of the areas of cut and fill, refer to the site - specific map.
2. D Storage Areas
For an accurate representation of the storage areas, refer to the site - specific map.
2. E Location of Asphalt and Concrete Batch Plants
Asphalt or concrete batch plants are not anticipated within the permitted area, but, if used, will
be included on the site - specific map.
2. F Locations of Structural BMPs
For an accurate representation of the location of structural BMPs, refer to the site - specific map.
2. G Locations of Non - Structural BMPs
For an accurate representation of the location of non - structural BMPs, refer to the site - specific
map.
2. H Locations of Springs, Wetlands and Other Surface Waters
For an accurate representation of the location of springs, wetlands, and other surface waters,
refer to the surface waters map attached as Figure 2, and to the site - specific map.
3. STORMWATER MANAGEMENT CONTROLS
3.A Stormwater Administrator
The Corporate SWMP Administrator for the Land Farm is:
Mr. Scott Reasoner
Vice President Western Operations
1775 Sherman Street Suite 3000
Denver, Colorado 80203
Phone: 303 - 860 -5800
The Local SWMP Administrator for the Land Farm is:
Mr. Ed Winters
120 N Railroad Avenue
Parachute, Colorado, 81635
Phone: 970 - 285 -9606
The SWMP Administrator is responsible for developing, implementing, maintaining and revising
the SWMP as necessary. The administrator may delegate the SWMP inspections and
maintenance of records to qualified personnel.
3.B Potential Pollutant Sources
Disturbed and stored soils: The construction activities will involve soil disturbances and
stockpiling. Clearing, grading, and otherwise altering previously undisturbed land can greatly
increase the rate of soil erosion over pre- disturbance rates. The resulting sediment can impact
the water quality of receiving streams.
Vehicle tracking of sediments: Vehicles will be accessing the site up until the Final Reclamation
phase. This can facilitate the unwanted movement of sediment off site.
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Management of contaminated soils: The purpose of the Land Farm is for the management of
contaminated soils. Hydrocarbons or hydrocarbon- impacted sediments are a potential pollution
source of this site during the Land Farming phase.
Loading and unloading operations: The site is not anticipated to require any type of storage
tanks. Loading and unloading will be limited to any equipment or materials required for the
construction or operation of the land farm.
Outdoor storage activities: The construction contractor will maintain a laydown or staging area
for equipment and material storage on site. Various soil amendments may also be stored on
site, which could potentially interact with stormwater and discharge nutrients off site.
Vehicle and equipment maintenance and fueling: During construction, it is possible that
equipment will be maintained or fueled on site. On -site maintenance and fueling could
potentially result in leaks or spills of fuel, gear oil, hydraulic oil, brake fluid, or grease.
Significant dust or particulate generating processes: Construction activities and vehicle traffic to
and from the site could potentially generate dust.
Routine maintenance activities: Various soil amendments will be used on site which could
potentially interact with stormwater and discharge nutrients off site. The use of herbicides is
also a possibility if weeds are encountered. See also "vehicle and equipment maintenance and
fueling" above.
On -site waste management practices: Trash receptacles will be located on site to contain
construction - related or other trash or debris. Liquid wastes are not anticipated, with the possible
exception of portable toilets (See "non- industrial waste sources" below).
Concrete truck /equipment washing: Concrete truck or equipment washing is not anticipated.
Dedicated asphalt and concrete batch plants: Dedicated asphalt and concrete batch plants are
not anticipated.
Non - industrial waste sources: All project phases involve people working on site. This can
generate personal and work - related trash and debris, and may also necessitate the use of
portable toilets. Clearing operations may also generate waste in the form of slash (trees, brush,
etc.).
Other areas or procedures: No other areas or procedures where spills can occur are
anticipated at this time.
Spills or leaks from potential sources are described in the SPCC plan. Response to certain
events may require specialized training due to health and safety concerns. The locations of
potential pollutant sources are shown on the site - specific map. BMPs utilized to address
potential pollutant sources are described in Section 3.
3.0 BMPs for Stormwater Pollution Prevention
This section describes the BMPs that will be used at the Land Farm for stormwater pollution
prevention. A BMP Manual containing the BMPs which may be implemented is included in
Appendix D. BMPs may be added or removed from the manual to accommodate changes in
site conditions and activities at the Land Farm.
Run -on protection and run -off controls will be installed prior to the beginning of construction
activities, as practicable, with consideration given to worker safety and site access. Additional
structural and non - structural Best Management Practices (BMPs) will likely need to be installed
during and following construction.
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Land Farm SWMP
3.C.1 Structural Practices for Erosion and Sediment Control
Descriptions, design and installation practices, and maintenance and removal considerations for
the structural BMPs available for use can be found in the BMP Manual. The location of all
structural BMPs will be found on the site - specific map.
3.C.2 Non - Structural Practices for Erosion and Sediment Control (includes wind
erosion /dust control)
Descriptions, design and installation practices, and maintenance and removal considerations for
the non - structural BMPs available for use can be found in the BMP manual. The location of all
non - structural practices will be found on the site - specific map.
3.C.3 Phased BMP Installation
The project will be phased to the extent practical to limit the amount of disturbed area that is
exposed at any given time. BMP implementation will be coordinated with the various stages of
construction. BMPs to control erosion and sediment transport will be installed prior to earth
disturbing activities. If additional areas are disturbed, BMPs will be implemented prior to the
start of ground disturbing activities in those areas. As portions of the site are completed and
previously disturbed areas are stabilized or the BMP is no longer needed, they will be removed.
Permanent or temporary erosion control measures for all slopes, channels, ditches, disturbed
land area, and soil stockpiles will be implemented as soon as practicable after final grading or
the final ground disturbance has been completed. When it is not possible to permanently
stabilize a disturbed area after a disturbance has been completed or where significant ground
disturbance activity ceases, temporary erosion control measures will be implemented as soon
as practicable. Table 2 below outlines the BMPs to be implemented during each phase of the
project.
Table 2 — BMP Phasing
Project Phase
BMPs to be implemented during each phase
Pre - Disturbance /Site Preparation
• Prepare stabilized staging area.
• Install vehicle tracking pad, geotextile, or mud mats
where applicable to provide designated access into
the ROW.
• Installation of perimeter control BMPs
• Limit access to areas that are not to be disturbed
protecting the existing vegetation.
Construction
• Locate stockpiles in work areas with perimeter
BMPs.
• Install BMPs per details in the BMP manual.
• Leave disturbed area of site in a surface
roughened condition when feasible.
• Protect, inspect and repair BMPs as necessary.
Post - construction
• Maintenance and repair of BMPs installed during
previous phases.
• Stabilize surface with gravel when feasible
• Inspection of BMPs
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Final Stabilization
• Perform seeding and mulching or the installation of
erosion control blankets where applicable.
• Remove all non - biodegradable temporary BMPs
when applicable.
3.C.4 Materials Handling and Spill Prevention
Spills or leaks from potential pollution sources will be handled as described in PDC's SPCC
plan
Petroleum Product Management
Pollutants from petroleum products used during construction activities adhere easily to soil
particles and other surfaces. In the case of a spill or leak, soils contaminated with petroleum
products will be contained and remediated onsite or removed to a proper disposal site.
Use of secondary containment will reduce the risk of spills or leaks contacting the ground,
including during loading and unloading operations. The use of drip pans will reduce the
likelihood of spills or leaks contacting the ground during vehicle or equipment maintenance or
fueling. Proposed soil erosion and sediment control practices will also aid in the retention of
spills or leaks.
Proposed maintenance and safe storage practices will reduce the chance of petroleum products
contaminating the site. Oily wastes such as crankcase oil, cans, rags, and paper containing oils
will be placed in proper receptacles and disposed of or recycled. Routine daily inspections will
be conducted to identify leaks form equipment and vehicles and if needed corrective actions will
be implemented.
The following guidelines for storing and managing petroleum products will be implemented:
All product containers will be clearly labeled
Drums (if present) will be kept off the ground, within secondary containment. Lids for
drummed materials will be securely fastened.
Fuel tanks (if present) will be stored within secondary containment
Emergency spill response procedures will be available on site Persons trained in
handling spills will be on call at all times
Spill response equipment and materials (absorbent, shovels, etc.) will be easily
accessible. Spills will be immediately cleaned up and contaminated materials will be
properly stored on site until they can be disposed of in accordance with applicable
regulations
Storage areas and containers will be regularly monitored for leaks and repaired or
replaced as necessary. Contractors and subcontractors should be reminded about
proper storage, handling and transferring of petroleum products or other hazardous
materials during safety meetings.
Other Material /Chemical Product Management
Any other chemicals or materials stored on site that could contribute pollutants to runoff will be
kept off the ground, and stored in original packaging and /or otherwise covered, to ensure that
the material does not interact with stormwater. Storage or laydown areas will be maintained
with good housekeeping, and regularly inspected for spills, leaks, and the potential of materials
commingling with stormwater. Any minor spills or leaks will be cleaned up immediately.
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Spill Response
All spills and releases of exploration and production waste or produced fluid exceeding 5 barrels
(210 gallons) including those contained within unlined berms, shall be reported in writing on the
COGCC Spill /Release Report Form 19 within 10 days of discovery of the spill.
All spills /releases that exceed 20 barrels (840 gallons) of exploration and production
liquids /waste shall be verbally reported to the COGCC at (303) 894 -2100 within 24 hours of
discovery.
Spills or releases of any size that impact or threaten to impact any waters of the state, residence
or occupied structure, livestock or public byway, shall be verbally reported to the COGCC as
soon as practical after discovery (COGCC Rule 906). If the spill may potentially reach waters of
the state (which includes surface water, ground water and dry gullies or storm sewers leading to
surface water), it must also be reported immediately to the CDPHE at 1- 877 - 518 -5608.
Spills or releases of more than 25 gallons of refined petroleum crude oil products such as
gasoline, diesel fuel, oil, or derivatives of mineral, animal or vegetable oil shall be reported to
the CDPHE at 1- 877 - 518 -5608, within 24 hours.
A hazardous substance release in any amount which enters or threatens to enter waters of the
state shall be reported to the CDPHE.
3.C.5 Dedicated Asphalt or Concrete Batch Plants
Dedicated asphalt or concrete batch plants are not anticipated within the permitted area.
However, if the need for a batch plant arises, proper management techniques will be utilized.
See SM -11 Temporary Batch Plant (TBP) in the BMP Manual for batch plant management
techniques.
3.C.6 Vehicle Tracking
In order to limit vehicle tracking of sediment, vehicles will use designated entry points into
construction areas. Access roads and drive paths on pads will be sloped and maintained such
that stormwater exits quickly, limiting the potential for excessive mud and rutting. Stabilization
methods, such as road base and chemical stabilizers, along with Vehicle Tracking Control
(VTC) and Stabilized Construction Roadway (SCR) (See SM -4 and SM -5 in the BMP Manual)
will be used where practicable. The location of vehicle tracking controls will be shown on the
site - specific map.
3.C.7 Waste Management and Disposal, Concrete Washout, and Contaminated Soils
Waste Management and Disposal
Construction - related and other trash will be collected in covered containers and hauled off -site
for disposal in suitable landfills. Portable toilets may be used to contain sanitary waste, with
waste materials regularly pumped and transported off -site for disposal at approved facilities. If
portable toilets are used, they will be staked or weighted to prevent tipping. Any slash from
clearing activities will, if possible, be chipped and used on site for mulch, or utilized as a brush
barrier at the site perimeter.
Concrete Washout
Concrete washout is not anticipated within the permitted area. However, if the need for
concrete washout arises, an appropriate containment structure will be utilized. See MM -1
Concrete Washout Area (CWA) in the BMP Manual for BMP descriptions and construction
details of concrete washout containments.
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11 Olsson Associates
Contaminated Soils
The contaminated soils that will be remediated at the Land Farm will be contained within the
land farm cells. All stormwater that is not already contained in the cells will be diverted to a
retention pond on site. This pond is designed to meet COGCC requirements, and will have the
capacity for a 25 -year, 24 -hour storm event.
The locations of any waste containments or concrete washout area on site are shown on the
site - specific map.
3.C.8 Ground Water and Stormwater Dewatering
No groundwater dewatering is anticipated at this time. If groundwater is encountered, the
dewatering of the site will be regulated by a dewatering permit issued through CDPHE. All
stormwater will be diverted by berms and /or diversion ditches to avoid contact with the
groundwater.
If the need for stormwater dewatering is encountered during construction activites, BMPs will be
utilized to prevent erosion and trap sediment. See SM -9 Dewatering Operations (DW) in the
BMP Manual for BMP descriptions for dewatering operations. No stormwater dewatering is
anticipated from the active land farm. If dewatering of the retention pond became necessary
during the Land Farming phase, the water would be trucked to an appropriate facility for
storage/ disposal.
4. FINAL STABILIZATION AND LONG TERM STORMWATER MANAGEMENT
A site is considered finally stabilized when all ground surface disturbing activities at the site
have been completed, and all disturbed areas have been either built on, compacted, covered,
paved, or otherwise stabilized in such a way as to minimize erosion to the extent practicable, or
a uniform vegetative cover has been established that reflects a total percent plant cover of at
least seventy percent (70 %) of pre- disturbance levels or reference areas.
Typical seed mix and application rates for the Land Farm are presented below in Table 3 (3.1-
3.4).
Table 3.1
Low- Elevation Salt - Desert Scrub /Basin Big Sagebrush
C :ommon Name
Scientific Name
Form
PLS
Ibsiacre"
F outlying Saltl7ush
.- ltrrpiex- ca.nescens
Slultb
1.9
Shadscale
Atr:piex- conferrifolia
Slllub
1.5
Ga11eta
P7euraphis [HilariaJ jarnesii
Bunch
2.5
Alkali Sacaton
Sporobohas air oides
Bunch
0.2
Streatnbar:. Wheatarass
Eh moos ianceolatus ssp. psannnophilus,
Agropyr°on Japan -urn
Sod - farming
2.5
Slender Wheatcrass
Er'}.maas trachvcauliis, Agrapyrora trachvcazr?zr n
Bunch
1.8
Sandljera Bluegrass
POa SandbElti (Poo secnnda)
Bunch
0.5
'Based on 45 pure live seeds (PLS) per square foot, drill- seeded. Double this rate (90 PLS per square foot) if
broadcast or lrrdroseeded.
PDC Energy, Inc.
Land Farm SWMP
12
Olsson Associates
Table 3.2
Pinyon-Juniper IN oodland, Nlountain,Wyoming Big Sagebrush Shrubland
Common Name
Scientific Name
FOrlit
PLS
lbsiacre*
Indian Ricegrass
Achnatherum [Oiyzopsis] hyrnenoides
Bunch
1.9
Galleta
Pleuraphis [Mkt-RV _lamest'
Bunch
2.5
Bluebunch Wheatgrass
Pseudoroegneria spicata, Agropyron spicatum
Bunch.
2.8
Slender Wheatgrass
Elymus trachyeauFus, Agropyron tracnycaulum
Bunch
3.3
Muttongrass
Poa fendieriana
Bunch
0.6
Sandberg. Bluegrass
Poa sandbergii, Poa secunda
Bunch
0.6
*Based on 60 pure rive seeds (PLS) per square foot, drill-seeded. Double this rate (120 PLS per square foot) if
broadcast or bydroseeded.
Table 3.3
Mixed Mountain Shrubland, Including Oakbrush
Common Name
Scientific Names
Form
PLS
lbsfacre*
Thickspike Wrheatgrass
Elpnus lanceolatus ssp, lanceolarus, Agropyron
dasystachvwn
Sod-forming
3.4
Bluebunch Wheatgrass
Pseudoroegneria spicato, Agropyron spicatum
Bunch
3.7
Boil lebrash Squirreltail
Elymus elyrnoides, Sttanion hystrix
Bunch
-, .7
Slender Wheatgrass
Eljonnis trachycaulus, Agropyron trachyrauluin
Bunch
3.3
Canby Bluegrass
Poa ambyi, P. secunda
Bunch
0.6
Mutton Bluegrass
Poa fendleriana
Bunch
0.6
Letterman Needlegrass
Achnatherum [Stipa] fettermanii
Bunch
1.7
Columbia Needlegrass
Achnatherum [Stipa] nelsonii, Stipa columbiana
Bunch
1.7
Indian Ricegrass
Achnatherum [Olyzopsis] hymenoides
Bunch
1.9
Junegrass
Koeleria rnacrantlia, K cristata
Bunch
0.1
'`Based on 60 pure live seeds (PLS) per square foot. drill-seeded, Double this rate (120 PLS per square foot) if
broadcast or byelt oseedeci.
Table 3.4
Spruce-Fir Forest. Including :Mountain Meadows
Common Name
Scientific Names
Form
PLS
lbsfacre*
Mountain Brome
Brotnopszs [Bromus] marginatus
Bunch
5.8
Slender \Vheatgrass
Elymus trachycaulus, Agropvron trachycaulum
Bunch
3_3
Letterman Needlegrass
Achnatherum [Stipa] lettermanta
Bunch
3_5
Blue Wildrye
Elymus glaucus
Bunch
4.8
Thickspike Wheatgrass
Elymus lanceolatus ssp. lanceolatus, Agropyron
dasystachyum
Sod-fonrung
34
Idaho Fescue
Festuca idahoensis
Bunch
12
Wheeler Bluegrass
Poa nervosa
Sod-forming
0.6
-Based on 60 pure live seeds (PLS) per square foot, drill-seeded. Double this rate (120 PLS per square foot) if
broadcast or hvdroseeded
PDC Energy, Inc.
Land Farm SWMP
13
Olsson Associates
Sites are considered finally stabilized once site preparation and interim reclamation (COGCC
Rule 1003) are complete and the above stabilization criteria have been met, even though the
site will be disturbed again in the future for final reclamation.
Once stabilized, the site will be removed from this SWMP for sediment controls. However, if
petroleum hydrocarbons or other chemicals affect stormwater as a result of industrial activities
on -site, the site will maintain permit coverage. Permanent BMPs may be left in place if it is
deemed necessary to maintain site stability.
5. INSPECTIONS AND MAINTENANCE PROCEDURES
Site inspections will be conducted with the requirements and minimum schedule as outlined in
Part I.D.6 of the CDPS general permit (COR- 030000). The requirements are as follows:
All active construction sites will be inspected at a minimum of at least once every 14
calendar days, and within 24 hours after the end of any precipitation or snowmelt event
that causes surface erosion.
If a site is considered temporarily idle, that is, no construction activities will occur
following a storm event, than a post -storm inspection will be conducted prior to re-
commencing constructing activities, but no later than 72 hours following the storm event.
Routine inspections must still be conducted at least every 14 calendar days.
For sites or portions of sites in which all construction activities that will result in ground
disturbance are completed, and all activities for final stabilization, as outlined above in
section 4, with the exception of vegetative coverage are completed, inspections will be
conducted at least once every month, and post -storm inspections are not required.
Inspections are not required at sites where snow cover exists over the entire site for an
extended period of time as long as melting conditions do not exist. The following
information must be documented in the inspection record for the use of this exclusion:
dates when snow cover occurred, date when construction activities ceased, and date
melting conditions began.
A trained and qualified person familiar with the SWMP and stormwater controls will conduct all
inspections. The scope of the inspection will cover the construction site perimeter, all disturbed
areas, material and /or waste storage areas that are exposed to precipitation, discharge
locations, and locations where vehicles access the site. These areas will be inspected for
evidence of, or the potential for, pollutants leaving the construction site boundaries entering the
stormwater drainage system, or discharging to waters of the state. Also, all erosion and
sediment control practices identified in this SWMP will be evaluated to ensure that they are
maintained and operating correctly.
Personnel performing site inspections will record the information as outlined below on the
inspection report. This inspection report will identify any incidents of non - compliance with the
terms and conditions of the general permit. The inspection report will include:
i. The inspection date
ii. Name(s) and title(s) of personnel making the inspection
iii. Location(s) of discharges of sediment or other pollutants from the site
iv. Location(s) of BMPs that need to be maintained
PDC Energy, Inc. 14 Olsson Associates
Land Farm SWMP
v. Location(s) of BMPs that failed to operate as designed or proved inadequate for a
particular location
vi. Location(s) where additional BMPs are needed that were not in place at the time of
inspection
vii. Deviations from the minimum inspection schedule as outlined above
viii. Description of corrective action for items iii, iv, v, and vi, above, dates corrective
action(s) taken, and measures taken to prevent future violations, including requisite
changes to the SWMP, as necessary
ix. After adequate corrective action(s) have been taken, or where a report does not identify
any incidents requiring corrective action(s), the report shall contain a signed statement
indicating the site is in compliance with the permit to the best of the signer's knowledge
and belief.
If deficiencies or maintenance issues are noted on the inspection form, or additional BMPs need
installed, then the Stormwater Administrator for PDC will be contacted and they will direct a
subcontractor to perform the proper actions.
BMPs that have failed, or have the potential to fail without maintenance or modification, will be
addressed as soon as possible, immediately in many cases, to prevent the discharge of
pollutants. All BMPs will be adequately maintained in accordance with good engineering,
hydrologic and pollution control practices, including removal of collected sediment outside the
acceptable tolerances of the BMPs.
All inspection records will be kept and maintained in PDCs database for a minimum of three
years from expiration or inactivation of permit coverage.
PDC Energy, Inc. 15 Olsson Associates
Land Farm SWMP
Figures
Intermittent Stream
Intermittent Stream
Colorado River
F: /Projects /011 -2618 PDC Land Farm Stormwater /GIS
375 750 1,125 1,500
Feet
PROJECT: 011 -2618
REVISED BY: SBS I
DATE: 1/4/2013
Legend
Nearest Recieving
RiversLakes
Permitted Area
SW Nearest Recieving Water Map
Piceance Centralized Soil Treatment Facility
PDC Energy, Inc.
SW 1/4 S25 T6 R95W
FIGURE
OLSSON
ASSOCIATES
826 21 1/2 Road
Grand Junction, Colorado 81505
P: 970-263-7800
F: 970-263-7456
2
F: /Projects /011 -2618 PDC Land Farm Stormwater /GIS
PROJECT: 011 -2618
Legend
REVISED BY: SBS I
DATE: 1/4/2013
Permitted Area
Piceance Centralized Soil Treatment Facility SW Permit Area
PDC Energy, Inc.
SW 1/4 S25 T6 R95W
OLSSON
FIGURE
ASSOCIATES
826 21 1/2 Road
Grand Junction, Colorado 81505
P: 970-263-7800
F: 970-263-7456
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O\OLSSON
ASSOCIATES
4690 Table Mountain Drive, Suite 200 TEL 303.237.2072
Golden, CO 80403 FAX 303.237.2659 www.oaconsulting.com
RCP CULVERT EXISTING SWALE /
ACCESS GATE FIRE ACCESS ROAD TO REMAIN
//
/
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1
NOTE
THIS DOCUMENT HAS BEEN
RELEASED BY OLSSON
ASSOCIATES ONLY FOR
REVIEW BY REGULATORY
AGENCIES AND OTHER
PROFESSIONALS, AND IS
DOCUMENTIIS NOT TO BEIS
USED FOR CONSTRUCTION.
OLSSON ASSOCIATES ASSUMES
NO RESPONSIBILITY FOR
EXISTING UTILITY LOCATIONS
HORIZONTAL OR VERTICAL).
THEEZi STINGUTILITI VT SHOWN
ON THIS DRAWING HAVE BEEN
PLOTTED FROM THE BEST
AVAILABLE INFORMATION. IT IS
HOWEVER THE RESPONSIBILITY
OF THE CONTRACTOR TO FIELD
VERIFY THE LOCATION OF ALL
UTILITIES PRIOR TO THE
COMMENCEMENT OF ANY
CONSTRUCTION ACTIVITIES.
REVISIONS DESCRIPTION
CO
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(1)
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30' I
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• /
RETENTION POND / /
\ sT
R2 / / /
z
SITE PLAN
PDC LANDFARM
GARFIELD COUNTY 2012
/
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635' R35' /
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/ 1 = 60'
drawn by: ED
checked by: WP
approved LP
:
project no.: project no.: 011 -2627
drawing no 011 -2627 SITE.DWG
0' 30' 60' 120'
SCALE IN FEET
da26 02 -10 -2012
SHEET
2 of Y
Appendix A
CDPS Certification COR- 031735
General Permit COR- 030000
Related Documentation
STATE OF COLORADO
John W. Hickenlooper, Governor
Christopher E. Urbina, MD, MPH
Executive Director and Chief Medical Officer
Dedicated to protecting and improving the health and environment of the people of Colorado
4300 Cherry Creek Dr. S.
Denver, Colorado 80246 -1530
Phone (303) 692 -2000
Located in Glendale, Colorado
http://www.cdphe.state.co.us
June 21, 2012
Laboratory Services Division
8100 Lowry Blvd.
Denver, Colorado 80230 -6928
(303) 692-3090
Scott Reasoner, VP Western Ops
Petroleum Development Corp
1775 Sherman St Ste 3000
Denver, CO 80203
Colorado Department
of Public Health
and Environment
RE: Renewal of Permit /Certification
Administrative Continuation
For: Piceance Centralized Soil Treatment Facility
Located at: I -70 Frontage Rd 6.8 mi E of Parachute, uninc, Garfield County
Permit No.: COR031735
Dear Mr. Reasoner;
The Division has received an application to renew the above permit /certification. It has been determined
that there is sufficient information to make this permit /certification eligible for renewal. More information
may be requested by the Division as progress is made in developing a new permit/certification for the
above listed facility. This information must be made available to the Division when requested to complete
the permit process.
The Division is currently in the process of developing a new permit or master general permit and
associated certification for the above permitted facility. The development and review procedures required
by law have not yet been completed. When the discharge permit issued to you for your facility expired on
June 30, 2012 your permit is administratively continued and remains in effect under Section 104(7) of the
Administrative Procedures Act, C.R.S. 1973, 24 -4 -101, et seq (1982 repl. vol. 10) until the new
permit /certification is issued and effective.
All effluent permit terms and conditions in your current permit will remain in effect until your new
permit /certification is issued and effective.
PLEASE KEEP THIS LETTER WITH YOUR PERMIT AND SWMP TO SHOW
CONTINUATION OF PERMIT COVERAGE.
Sincerely,
Debbie Jessop
Permits Section
WATER QUALITY CONTROL DIVISION
xc: Permit File
Colorado Department
of public Health
and Environment
CERTIFICATION TO DISCHARGE
UNDER
CDPS GENERAL PERMIT COR- 0300000
STORMWATER ASSOCIATED WITH CONSTRUCTION ACTIVITIES
Certification Number: COR031735
This Certification to Discharge specifically authorizes:
Petroleum Development Corp
to discharge stormwater from the facility identified as
Piceance Centralized Soil Treatment Facility
To the waters of the State of Colorado, including, but not limited to:
ephemeral drainage - Colorado River
Facility Industrial Activity : Oil and Gas Production and /or Exploration,
Facility Located at:
1 -70 Frontage Rd 6.8 mi E of Parachute, uninc
Garfield County, CO 00000
Latitude 39.491, Longitude - 107.954
Certification is effective: 2/28/2012 Certification Expires: 6/30/2012
This certification under the permit requires that specific actions be performed at designated times. The
certification holder is legally obligated to comply with all terms and conditions of the permit.
Signed,
Nathan Moore
Construction /MS4 /Pretreatment Unit Manager
Water Quality Control Division
Page 1 of 22
Page 2 of 22
Permit No. COR- 030000
CDPS GENERAL PERMIT
STORMWATER DISCHARGES ASSOCIATED WITH
CONSTRUCTION ACTIVITY
AUTHORIZATION TO DISCHARGE UNDER THE
COLORADO DISCHARGE PERMIT SYSTEM
In compliance with the provisions of the Colorado Water Quality Control Act, (25 -8 -101 et seq., CRS, 1973
as amended) and the Federal Water Pollution Control Act, as amended (33 U.S.C. 1251 et seq.; the "Act "),
this permit authorizes the discharge of stormwater associated with construction activities (and specific
allowable non - stormwater discharges in accordance with Part I.D.3 of the permit) certified under this permit,
from those locations specified throughout the State of Colorado to specified waters of the State. Such
discharges shall be in accordance with the conditions of this permit.
This permit specifically authorizes the facility listed on the certification page (page 1) of this permit to
discharge, as of this date, in accordance with permit requirements and conditions set forth in Parts I and II
hereof. All discharges authorized herein shall be consistent with the terms and conditions of this permit.
This permit and the authorization to discharge shall expire at midnight, June 30, 2012.
Issued and Signed this 31St day of May, 2007
COLORADO DEPARTMENT OF PUBLIC HEALTH AND ENVIRONMENT
Janet S. Kieler
Permits Section Manager
Water Quality Control Division
SIGNED AND ISSUED MAY 31, 2007
EFFECTIVE JULY 1, 2007
TABLE OF CONTENTS
PART I
A. COVERAGE UNDER THIS PERMIT 3
1. Authority to Discharge 3
a) Applicable Sections 3
b) Oil and Gas Construction 3
2. Definitions 3
3. Permit Coverage Without Application — Qualifying Local Programs 3
a) Applicable Sections 3
b) Local Agency Authority 4
c) Permit Coverage Termination 4
d) Compliance with Qualifying Local Program 4
e) Full Permit Applicability 4
4. Application, Due Dates 4
a) Application Due Dates 4
b) Summary of Application 4
5. Permit Certification Procedures 4
a) Request for Additional Information 4
b) Automatic Coverage 5
c) Individual Permit Required 5
d) General vs. Individual Permit Coverage 5
e) Local Agency Authority 5
6. Inactivation Notice 5
7. Transfer of Permit 5
8. Reassignment of Permit 5
9. Sale of Residence to Homeowners 6
10. Permit Expiration Date 6
11. Individual Permit Criteria 6
B. STORMWATER MANAGEMENT PLAN — GENERAL REQUIREMENTS 6
C. STORMWATER MANAGEMENT PLAN — CONTENTS 7
1. Site Description 7
2. Site Map 7
3. Stormwater Management Controls 8
a) SWMP Administrator 8
b) Identification of Potential Pollutant Sources 8
c) Best Management Practices (BMPs) for Stormwater Pollution Prevention. 8
4. Final Stabilization and Long -term Stormwater Management 9
5. Inspection and Maintenance 10
D. TERMS AND CONDITIONS 10
1. General Limitations 10
2. BMP Implementation and Design Standards 10
3. Prohibition of Non - Stormwater Discharges 11
4. Releases in Excess of Reportable Quantities 11
5. SWMP Requirements 11
a) SWMP Preparation and Implementation 11
b) SWMP Retention Requirements 11
c) SWMP Review /Changes 11
d) Responsive SWMP Changes 12
6. Inspections 12
a) Minimum Inspection Schedule 12
b) Inspection Requirements 13
c) Required Actions Following Site Inspections 13
7. BMP Maintenance 13
8. Replacement and Failed BMPs 14
9. Reporting 14
-2a-
TABLE OF CONTENTS (cont.)
10. SWMP Availability 14
11. Total Maximum Daily Load (TMDL) 14
E. ADDITIONAL DEFINITIONS 15
F. GENERAL REQUIREMENTS 16
1. Signatory Requirements 16
2. Retention of Records 16
3. Monitoring 16
PART II
A. MANAGEMENT REQUIREMENTS 17
1. Amending a Permit Certification 17
2. Special Notifications - Definitions 17
3. Noncompliance Notification 17
4. Submission of Incorrect or Incomplete Information 18
5. Bypass 18
6. Upsets 18
7. Removed Substances 18
8. Minimization of Adverse Impact 18
9. Reduction, Loss, or Failure of Stormwater Controls 19
10. Proper Operation and Maintenance 19
B. RESPONSIBILITIES 19
1. Inspections and Right to Entry 19
2. Duty to Provide Information 19
3. Transfer of Ownership or Control 19
4. Modification, Suspension, or Revocation of Permit By Division 20
5. Permit Violations 21
6. Legal Responsibilities 21
7. Severability 21
8. Renewal Application 21
9. Confidentiality 21
10. Fees 21
11. Requiring an Individual CDPS Permit 22
PART I
A. COVERAGE UNDER THIS PERMIT
1. Authority to Discharge
PART I
Permit - Page 3
Permit No. COR- 030000
Under this permit, facilities are granted authorization to discharge stormwater associated with construction activities into
waters of the state of Colorado. This permit also authorizes the discharge of specific allowable non - stormwater discharges,
in accordance with Part I.D.3 of the permit, which includes discharges to the ground. This includes stormwater discharges
from areas that are dedicated to producing earthen materials, such as soils, sand and gravel, for use at a single construction
site (i.e., borrow or fill areas). This permit also authorizes stormwater discharges from dedicated asphalt batch plants and
dedicated concrete batch plants. (Coverage under the construction site permit is not required for batch plants if they have
alternate CDPS permit coverage.) This permit does not authorize the discharge of mine water or process water from such
areas.
a) Applicable Sections: In accordance with Part I.A.3 of this permit, some parts of this permit do not apply to sites
covered under a Qualifying Local Program, as defined in I.A.2.d. For sites not covered by a Qualifying Local
Program, all parts of the permit apply except Part I.A.3. The permittee will be responsible for determining and then
complying with the applicable sections.
b) Oil and Gas Construction: Stormwater discharges associated with construction activities directly related to oil and
gas exploration, production, processing, and treatment operations or transmission facilities are regulated under the
Colorado Discharge Permit System Regulations (5CCR 1002 -61), and require coverage under this permit in
accordance with that regulation. However, references in this permit to specific authority under the Federal Clean
Water Act (CWA) do not apply to stormwater discharges associated with these oil and gas related construction
activities, to the extent that the references are limited by the federal Energy Policy Act of 2005.
2. Definitions
a) Stormwater: Stormwater is precipitation- induced surface runoff.
b) Construction activity: Construction activity refers to ground surface disturbing activities, which include, but are
not limited to, clearing, grading, excavation, demolition, installation of new or improved haul roads and access
roads, staging areas, stockpiling of fill materials, and borrow areas. Construction does not include routine
maintenance to maintain original line and grade, hydraulic capacity, or original purpose of the facility.
c) Small construction activity: Stormwater discharge associated with small construction activity means the discharge
of stormwater from construction activities that result in land disturbance of equal to or greater than one acre and less
than five acres. Small construction activity also includes the disturbance of less than one acre of total land area that
is part of a larger common plan of development or sale, if the larger common plan will ultimately disturb equal to or
greater than one and less than five acres.
d) Qualifying Local Program: This permit includes conditions that incorporate qualifying local erosion and sediment
control program (Qualifying Local Program) requirements by reference. A Qualifying Local Program is a municipal
stormwater program for stormwater discharges associated with small construction activity that has been formally
approved by the Division.
Other Definitions: Definitions of additional terms can be found in Part I.E. of this permit.
3. Permit Coverage Without Application — for small construction activities under a Qualifying Local Program only
If a small construction site is within the jurisdiction of a Qualifying Local Program, the operator of the construction
activity is authorized to discharge stormwater associated with small construction activity under this general permit without
the submittal of an application to the Division.
a) Applicable Sections: For sites covered by a Qualifying Local Program, only Parts 1.A.1, 1.A.2, 1.A.3, I.D.1, I.D.2,
I.D.3, I.D.4, I.D.7, I.D.8, I.D.11, I.E and Part II of this permit, with the exception of Parts II.A.1, II.B.3, II.B.8, and
II.B10, apply.
PART I
Permit - Page 4
Permit No. COR- 030000
A. COVERAGE UNDER THIS PERMIT (cont.)
b) Local Agency Authority: This permit does not pre -empt or supersede the authority of local agencies to prohibit,
restrict, or control discharges of stormwater to storm drain systems or other water courses within their jurisdiction.
c) Permit Coverage Termination: When a site under a Qualifying Local Program has been finally stabilized,
coverage under this permit is automatically terminated.
d) Compliance with Qualifying Local Program: A construction site operator that has authorization to discharge
under this permit under Part I.A.3 shall comply with the requirements of the Qualifying Local Program with
jurisdiction over the site.
e) Full Permit Applicability: The Division may require any operator within the jurisdiction of a Qualifying Local
Program covered under this permit to apply for and obtain coverage under the full requirements of this permit. The
operator must be notified in writing that an application for full coverage is required. When a permit certification
under this permit is issued to an operator that would otherwise be covered under Part I.A.3 of this permit, the full
requirements of this permit replace the requirements as per Part I.A.3 of this permit, upon the effective date of the
permit certification. A site brought under the full requirements of this permit must still comply with local
stormwater management requirements, policies or guidelines as required by Part I.D.1.g of this permit.
4. Application, Due Dates
a) Application Due Dates: At least ten calendar days prior to the commencement of construction activities, the
applicant shall submit an application form as provided by the Division, with a certification that the Stormwater
Management Plan (SWMP) is complete.
One original completed discharge permit application shall be submitted, by mail or hand delivery, to:
Colorado Department of Public Health and Environment
Water Quality Control Division
WQCD - Permits -B2
4300 Cherry Creek Drive South
Denver, Colorado 80246 -1530
b) Summary of Application: The application requires, at a minimum, the following:
1) The applicant's company name; address; telephone number; and email address (if available); whether the
applicant is the owner, developer, or contractor; and local contact information;
2) Project name, address, county and location of the construction site, including the latitude and longitude to the
nearest 15 seconds of the approximate center of the construction activity;
3) Legal description or map of the construction site;
4) Estimates of: the total area of the site, the area of the site that is expected to be disturbed, and the total area of
the larger common plan of development or sale to undergo disturbance;
5) The nature of the construction activity;
6) The anticipated start date and final stabilization date for the project;
7) The name of the receiving water(s), or the municipal separate storm sewer system and the ultimate (i.e., named)
receiving water(s);
8) Certification that the SWMP for the construction site is complete (see Part I.C. below); and
9) The signature of the applicant, signed in accordance with Part I.F.1 of this permit.
5. Permit Certification Procedures
If this general permit is appropriate for the applicant's operation, then a certification will be developed and the applicant
will be authorized to discharge stormwater under this general permit.
a) Request for Additional Information: The Division shall have up to ten calendar days after receipt of the above
information to request additional data and/or deny the authorization for any particular discharge. Upon receipt of
additional information, the Division shall have an additional ten calendar days to issue or deny authorization for
the particular discharge. (Notification of denial shall be by letter, in cases where coverage under an alternate general
permit or an individual permit is required, instead of coverage under this permit.)
PART I
Permit - Page 5
Permit No. COR- 030000
A. COVERAGE UNDER THIS PERMIT (cont.)
b) Automatic Coverage: If the applicant does not receive a request for additional information or a notification of
denial from the Division dated within ten calendar days of receipt of the application by the Division, authorization to
discharge in accordance with the conditions of this permit shall be deemed granted.
c) Individual Permit Required: If, after evaluation of the application (or additional information, such as the SWMP),
it is found that this general permit is not appropriate for the operation, then the application will be processed as one
for an individual permit. The applicant will be notified of the Division's decision to deny certification under this
general permit. For an individual permit, additional information may be requested, and 180 days may be required to
process the application and issue the permit. At the Division's discretion, temporary coverage under this general
permit may be allowed until the individual permit goes into effect.
d) General vs. Individual Permit Coverage: Any permittee authorized by this permit may request to be excluded
from the coverage of this permit by applying for an individual CDPS permit. The permittee shall submit an
individual application, with reasons supporting the request, to the Division at least 180 days prior to any discharge.
e) Local Agency Authority: This permit does not pre -empt or supersede the authority of local agencies to prohibit,
restrict, or control discharges of stormwater to storm drain systems or other water courses within their jurisdiction.
6. Inactivation Notice
When a site has been finally stabilized in accordance with the SWMP, the permittee must submit an Inactivation Notice
form that is signed in accordance with Part I.F.1. of this permit. The Inactivation Notice form is available from the
Division and includes:
a) Permit certification number;
b) The permittee's name, address, telephone number;
c) Name, location, and county for the construction site for which the inactivation notice is being submitted; and
d) Certification that the site has been finally stabilized, and a description of the final stabilization method(s).
7. Transfer of Permit
When responsibility for stormwater discharges at a construction site changes from one entity to another, the permittee shall
submit a completed Notice of Transfer and Acceptance of Terms form that is signed in accordance with Part I.F.1. of
this permit. The Notice of Transfer form is available from the Division and includes:
a) Permit certification number;
b) Name, location, and county for the construction site for which the Notice of Transfer is being submitted;
c) Identifying information for the new permittee;
d) Identifying information for the current permittee; and
e) Effective date of transfer.
If the new responsible party will not complete the transfer form, the permit may be inactivated upon written request to the
Division and completion of the Inactivation Notice if the permittee has no legal responsibility, through ownership or
contract, for the construction activities at the site. In this case, the new owner or operator would be required to obtain
permit coverage separately.
8. Reassignment of Permit
When a permittee no longer has control of a specific portion of a permitted site, and wishes to transfer coverage of that
portion of the site to a second party, the permittee shall submit a completed Notice of Reassignment of Permit Coverage
form that is signed in accordance with Part I.F.1. of this permit. The Notice of Reassignment of Permit Coverage form is
available from the Division and includes:
a) Current permit certification number;
b) Identifying information and certification as required by Part I.A.4.b for the new permittee;
c) Identifying information for the current permittee, revised site information and certification for reassignment; and
d) Effective date of reassignment.
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Permit No. COR- 030000
A. COVERAGE UNDER THIS PERMIT (cont.)
If the new responsible party will not complete the reassignment form, the applicable portion of the permitted site may be
removed from permit coverage upon written request to the Division if the permittee has no legal responsibility, through
ownership or contract, for the construction activities at the portion of the site. In this case, the new owner or operator
would be required to obtain permit coverage separately.
9. Sale of Residence to Homeowners
For residential construction only, when a residential lot has been conveyed to a homeowner and all criteria in paragraphs
a through e, below, are met, coverage under this permit is no longer required and the conveyed lot may be removed from
coverage under the permittee's certification. At such time, the permittee is no longer responsible for meeting the terms and
conditions of this permit for the conveyed lot, including the requirement to transfer or reassign permit coverage. The
permittee remains responsible for inactivation of the original certification.
a) The lot has been sold to the homeowner(s) for private residential use;
b) the lot is less than one acre of disturbed area;
c) all construction activity conducted by the permittee on the lot is completed;
d) a certificate of occupancy (or equivalent) has been awarded to the home owner; and
e) the SWMP has been amended to indicate the lot is no longer covered by permit.
Lots not meeting all of the above criteria require continued permit coverage. However, this permit coverage may be
transferred (Part I.A.7, above) or reassigned (Part I.A.8, above) to a new owner or operator.
10. Permit Expiration Date
Authorization to discharge under this general permit shall expire on June 30, 2012. The Division must evaluate and
reissue this general permit at least once every five years and must recertify the permittee's authority to discharge under the
general permit at such time. Therefore, a permittee desiring continued coverage under the general permit must reapply by
March 31, 2012. The Division will initiate the renewal process; however, it is ultimately the permittee's responsibility to
ensure that the renewal is submitted. The Division will determine if the permittee may continue to operate under the terms
of the general permit. An individual permit may be required for any facility not reauthorized to discharge under the
reissued general peiuut.
11. Individual Permit Criteria
Various criteria can be used in evaluating whether or not an individual (or alternate general) permit is required instead of
this general permit. This information may come from the application, SWMP, or additional information as requested by
the Division, and includes, but is not limited to, the following:
a) the quality of the receiving waters (i.e., the presence of downstream drinking water intakes or a high quality fishery,
or for preservation of high quality water);
b) the size of the construction site;
c) evidence of noncompliance under a previous permit for the operation;
d) the use of chemicals within the stormwater system; or
e) discharges of pollutants of concern to waters for which there is an established Total Maximum Daily Load (TMDL).
In addition, an individual permit may be required when the Division has shown or has reason to suspect that the
stormwater discharge may contribute to a violation of a water quality standard.
B. STORMWATER MANAGEMENT PLAN (SWMP) — GENERAL REQUIREMENTS
1. A SWMP shall be developed for each facility covered by this permit. The SWMP shall be prepared in accordance with
good engineering, hydrologic and pollution control practices. (The SWMP need not be prepared by a registered engineer.)
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Permit No. COR- 030000
B. STORMWATER MANAGEMENT PLAN (SWMP) — GENERAL REQUIREMENTS (cont.)
2. The SWMP shall:
a) Identify all potential sources of pollution which may reasonably be expected to affect the quality of stormwater
discharges associated with construction activity from the facility;
b) Describe the practices to be used to reduce the pollutants in stormwater discharges associated with construction
activity at the facility; and ensure the practices are selected and described in accordance with good engineering
practices, including the installation, implementation and maintenance requirements; and
c) Be properly prepared, and updated in accordance with Part I.D.5.c, to ensure compliance with the terms and
conditions of this permit.
3. Facilities must implement the provisions of the SWMP as written and updated, from commencement of construction activity
until final stabilization is complete, as a condition of this permit. The Division reserves the right to review the SWMP, and
to require the permittee to develop and implement additional measures to prevent and control pollution as needed.
4. The SWMP may reflect requirements for Spill Prevention Control and Countermeasure (SPCC) plans under section 311 of
the CWA, or Best Management Practices (BMPs) Programs otherwise required by a separate CDPS permit, and may
incorporate any part of such plans into the SWMP by reference, provided that the relevant sections of such plans are
available as part of the SWMP consistent with Part I.D.5.b.
5. For any sites with permit coverage before June 30, 2007, the permittee's SMWP must meet the new SWMP requirements as
summarized in Section II.I of the rationale. Any needed changes must be made by October 1, 2007.
C. STORMWATER MANAGEMENT PLAN (SWMP) — CONTENTS
The SWMP shall include the following items, at a minimum.
1. Site Description. The SWMP shall clearly describe the construction activity, to include:
a) The nature of the construction activity at the site.
b) The proposed sequence for major activities.
c) Estimates of the total area of the site, and the area and location expected to be disturbed by clearing, excavation,
grading, or other construction activities.
d) A summary of any existing data used in the development of the site construction plans or SWMP that describe the
soil or existing potential for soil erosion.
e) A description of the existing vegetation at the site and an estimate of the percent vegetative ground cover.
f) The location and description of all potential pollution sources, including ground surface disturbing activities (see
Part I.A.2.b), vehicle fueling, storage of fertilizers or chemicals, etc.
g) The location and description of any anticipated allowable sources of non - stormwater discharge at the site, e.g.,
uncontaminated springs, landscape irrigation return flow, construction dewatering, and concrete washout.
h) The name of the receiving water(s) and the size, type and location of any outfall(s). If the stormwater discharge is to
a municipal separate storm sewer system, the name of that system, the location of the storm sewer discharge, and the
ultimate receiving water(s).
2. Site Map. The SWMP shall include a legible site map(s), showing the entire site, identifying:
a) construction site boundaries;
b) all areas of ground surface disturbance;
c) areas of cut and fill;
d) areas used for storage of building materials, equipment, soil, or waste;
e) locations of dedicated asphalt or concrete batch plants;
f) locations of all structural BMPs;
g) locations of non - structural BMPs as applicable; and
h) locations of springs, streams, wetlands and other surface waters.
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Permit No. COR- 030000
C. STORMWATER MANAGEMENT PLAN (SWMP) — CONTENTS (cont.)
3. Stormwater Management Controls.
The SWMP must include a description of all stormwater management controls that will be implemented as part of the
construction activity to control pollutants in stormwater discharges. The appropriateness and priorities of stormwater
management controls in the SWMP shall reflect the potential pollutant sources identified at the facility.
The description of stormwater management controls shall address the following components, at a minimum.
a) SWMP Administrator - The SWMP shall identify a specific individual(s), position or title who is responsible for
developing, implementing, maintaining, and revising the SWMP. The activities and responsibilities of the
administrator shall address all aspects of the facility's SWMP.
b) Identification of Potential Pollutant Sources - All potential pollutant sources, including materials and activities, at
a site must be evaluated for the potential to contribute pollutants to stormwater discharges. The SWMP shall
identify and describe those sources determined to have the potential to contribute pollutants to stormwater
discharges, and the sources must be controlled through BMP selection and implementation, as required in paragraph
(c), below.
At a minimum, each of the following sources and activities shall be evaluated for the potential to contribute
pollutants to stormwater discharges, and identified in the SWMP if found to have such potential:
1) all disturbed and stored soils;
2) vehicle tracking of sediments;
3) management of contaminated soils;
4) loading and unloading operations;
5) outdoor storage activities (building materials, fertilizers, chemicals, etc.);
6) vehicle and equipment maintenance and fueling;
7) significant dust or particulate generating processes;
8) routine maintenance activities involving fertilizers, pesticides, detergents, fuels, solvents, oils, etc.;
9) on -site waste management practices (waste piles, liquid wastes, dumpsters, etc.);
10) concrete truck/equipment washing, including the concrete truck chute and associated fixtures and equipment;
11) dedicated asphalt and concrete batch plants;
12) non - industrial waste sources such as worker trash and portable toilets; and
13) other areas or procedures where potential spills can occur.
c) Best Management Practices (BMPs) for Stormwater Pollution Prevention - The SWMP shall identify and
describe appropriate BMPs, including, but not limited to, those required by paragraphs 1 through 8 below, that will
be implemented at the facility to reduce the potential of the sources identified in Part I.C.3.b to contribute pollutants
to stormwater discharges. The SWMP shall clearly describe the installation and implementation specifications for
each BMP identified in the SWMP to ensure proper implementation, operation and maintenance of the BMP.
1) Structural Practices for Erosion and Sediment Control. The SWMP shall clearly describe and locate all
structural practices implemented at the site to minimize erosion and sediment transport. Practices may include,
but are not limited to: straw bales, wattles /sediment control logs, silt fences, earth dikes, drainage swales,
sediment traps, subsurface drains, pipe slope drains, inlet protection, outlet protection, gabions, and temporary
or permanent sediment basins.
2) Non - Structural Practices for Erosion and Sediment Control. The SWMP shall clearly describe and locate, as
applicable, all non - structural practices implemented at the site to minimize erosion and sediment transport.
Description must include interim and permanent stabilization practices, and site - specific scheduling for
implementation of the practices. The SWMP should include practices to ensure that existing vegetation is
preserved where possible. Non - structural practices may include, but are not limited to: temporary vegetation,
permanent vegetation, mulching, geotextiles, sod stabilization, slope roughening, vegetative buffer strips,
protection of trees, and preservation of mature vegetation.
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Permit No. COR- 030000
C. STORMWATER MANAGEMENT PLAN (SWMP) — CONTENTS (cont.)
3) Phased BMP Implementation. The SWMP shall clearly describe the relationship between the phases of
construction, and the implementation and maintenance of both structural and non - structural stormwater
management controls. The SWMP must identify the stormwater management controls to be implemented
during the project phases, which can include, but are not limited to, clearing and grubbing; road construction;
utility and infrastructure installation; vertical construction; final grading; and final stabilization.
4) Materials Handling and Spill Prevention. The SWMP shall clearly describe and locate all practices
implemented at the site to minimize impacts from procedures or significant materials (see definitions at Part
I.E.) that could contribute pollutants to runoff. Such procedures or significant materials could include: exposed
storage of building materials; paints and solvents; fertilizers or chemicals; waste material; and equipment
maintenance or fueling procedures.
Areas or procedures where potential spills can occur must have spill prevention and response procedures
identified in the SWMP.
5) Dedicated Concrete or Asphalt Batch Plants. The SWMP shall clearly describe and locate all practices
implemented at the site to control stormwater pollution from dedicated concrete batch plants or dedicated
asphalt batch plants covered by this certification.
6) Vehicle Tracking Control. The SWMP shall clearly describe and locate all practices implemented at the site to
control potential sediment discharges from vehicle tracking. Practices must be implemented for all areas of
potential vehicle tracking, and can include• minimizing site access; street sweeping or scraping; tracking pads;
graveled parking areas; requiring that vehicles stay on paved areas on -site; wash racks; contractor education;
and/or sediment control BMPs, etc.
7) Waste Management and Disposal, Including Concrete Washout.
i) The SWMP shall clearly describe and locate the practices implemented at the site to control stormwater
pollution from all construction site wastes (liquid and solid), including concrete washout activities.
ii) The practices used for concrete washout must ensure that these activities do not result in the contribution
of pollutants associated with the washing activity to stormwater runoff.
iii) Part I.D.3.c of the permit authorizes the conditional discharge of concrete washout water to the ground.
The SWMP shall clearly describe and locate the practices to be used that will ensure that no washout
water from concrete washout activities is discharged from the site as surface runoff or to surface waters.
8) Groundwater and Stormwater Dewatering.
i) The SWMP shall clearly describe and locate the practices implemented at the site to control stormwater
pollution from the dewatering of groundwater or stormwater from excavations, wells, etc.
ii) Part I.D.3.d of the permit authorizes the conditional discharge of construction dewatering to the ground.
For any construction dewatering of groundwater not authorized under a separate CDPS discharge permit,
the SWMP shall clearly describe and locate the practices to be used that will ensure that no groundwater
from construction dewatering is discharged from the site as surface runoff or to surface waters.
4. Final Stabilization and Long -term Stormwater Management
a) The SWMP shall clearly describe the practices used to achieve final stabilization of all disturbed areas at the site,
and any planned practices to control pollutants in stormwater discharges that will occur after construction operations
have been completed at the site.
b) Final stabilization practices for obtaining a vegetative cover should include, as appropriate: seed mix selection and
application methods; soil preparation and amendments; soil stabilization practices (e.g., crimped straw, hydro mulch
or rolled erosion control products); and appropriate sediment control BMPs as needed until final stabilization is
achieved; etc.
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Permit No. COR- 030000
C. STORMWATER MANAGEMENT PLAN (SWMP) — CONTENTS (cont.)
c) Final stabilization is reached when all ground surface disturbing activities at the site have been completed, and
uniform vegetative cover has been established with an individual plant density of at least 70 percent of pre -
disturbance levels, or equivalent permanent, physical erosion reduction methods have been employed.
The Division may, after consultation with the permittee and upon good cause, amend the final stabilization criteria in this
section for specific operations.
5. Inspection and Maintenance
Part I.D.6 of the permit includes requirements for site inspections. Part I.D.7 of the permit includes requirements for BMP
maintenance. The SWMP shall clearly describe the inspection and maintenance procedures implemented at the site to
maintain all erosion and sediment control practices and other protective practices identified in the SWMP, in good and
effective operating condition.
D. TERMS AND CONDITIONS
1. General Limitations
The following limitations shall apply to all discharges covered by this permit:
a) Stormwater discharges from construction activities shall not cause, have the reasonable potential to cause, or
measurably contribute to an exceedance of any water quality standard, including narrative standards for water
quality.
b) Concrete washout water shall not be discharged to state surface waters or to storm sewer systems. On -site
permanent disposal of concrete washout waste is not authorized by this permit. Discharge to the ground of concrete
washout waste that will subsequently be disposed of off -site is authorized by this permit. See Part I.D.3.c of the
permit.
c) Bulk storage structures for petroleum products and any other chemicals shall have secondary containment or
equivalent adequate protection so as to contain all spills and prevent any spilled material from entering State waters.
d) No chemicals are to be added to the discharge unless permission for the use of a specific chemical is granted by the
Division. In granting the use of such chemicals, special conditions and monitoring may be addressed by separate
correspondence.
e) The Division reserves the right to require sampling and testing, on a case -by -case basis, in the event that there is
reason to suspect that compliance with the SWMP is a problem, or to measure the effectiveness of the BMPs in
removing pollutants in the effluent. Such monitoring may include Whole Effluent Toxicity testing.
f) All site wastes must be properly managed to prevent potential pollution of State waters. This permit does not
authorize on -site waste disposal.
g)
All dischargers must comply with the lawful requirements of federal agencies, municipalities, counties, drainage
districts and other local agencies regarding any discharges of stormwater to storm drain systems or other water
courses under their jurisdiction, including applicable requirements in municipal stormwater management programs
developed to comply with CDPS permits. Dischargers must comply with local stormwater management
requirements, policies or guidelines including erosion and sediment control.
2. BMP Implementation and Design Standards
Facilities must select, install, implement, and maintain appropriate BMPs, following good engineering, hydrologic and
pollution control practices. BMPs implemented at the site must be adequately designed to provide control for all potential
pollutant sources associated with construction activity to prevent pollution or degradation of State waters.
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Permit No. COR- 030000
D. TERMS AND CONDITIONS (cont.)
3. Prohibition of Non - Stormwater Discharges
a) Except as provided in paragraphs b, c, and d below, all discharges covered by this permit shall be composed
entirely of stormwater associated with construction activity. Discharges of material other than stormwater must
be addressed in a separate CDPS permit issued for that discharge.
b) Discharges from the following sources that are combined with stormwater discharges associated with construction
activity may be authorized by this permit, provided that the non - stormwater component of the discharge is identified
in the SWMP (see Part I.C.1.g of this permit):
- emergency fire fighting activities - landscape irrigation return flow
- uncontaminated springs
c) Discharges to the ground of concrete washout water from washing of tools and concrete mixer chutes may be
authorized by this permit, provided that:
1) the source is identified in the SWMP;
2) BMPs are included in the SWMP in accordance with Part I.C.3(c)(7) and to prevent pollution of groundwater in
violation of Part I.D.1.a; and
3) these discharges do not leave the site as surface runoff or to surface waters
d) Discharges to the ground of water from construction dewatering activities may be authorized by this permit,
provided that:
1) the source is groundwater and/or groundwater combined with stormwater that does not contain pollutants in
concentrations exceeding the State groundwater standards in Regulations 5 CCR 1002 -41 and 42;
2) the source is identified in the SWMP;
3) BMPs are included in the SWMP, as required by Part I.C.3(c)(8); and
4) these discharges do not leave the site as surface runoff or to surface waters.
Discharges to the ground from construction dewatering activities that do not meet the above criteria must be covered
under a separate CDPS discharge permit. Contaminated groundwater requiring coverage under a separate CDPS
discharge permit may include groundwater contaminated with pollutants from a landfill, mining activity, industrial
pollutant plume, underground storage tank, or other source.
4. Releases in Excess of Reportable Quantities
This permit does not relieve the permittee of the reporting requirements of 40 CFR 110, 40 CFR 117 or 40 CFR 302. Any
discharge of hazardous material must be handled in accordance with the Division's Noncompliance Notification
Requirements (see Part II.A.3 of the permit).
5. SWMP Requirements
a) SWMP Preparation and Implementation: The SWMP shall be prepared prior to applying for coverage under the
general permit, and certification of its completion submitted with the application. The SWMP shall be implemented
prior to commencement of construction activities. The plan shall be updated as appropriate (see paragraph c,
below), below). SWMP provisions shall be implemented until expiration or inactivation of permit coverage.
b) SWMP Retention Requirements: A copy of the SWMP must be retained on site unless another location, specified
by the permittee, is approved by the Division.
c) SWMP Review /Changes: The permittee shall amend the SWMP:
1) when there is a change in design, construction, operation, or maintenance of the site, which would require the
implementation of new or revised BMPs; or
2) if the SWMP proves to be ineffective in achieving the general objectives of controlling pollutants in stormwater
discharges associated with construction activity; or
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Permit No. COR- 030000
D. TERMS AND CONDITIONS (cont.)
3) when BMPs are no longer necessary and are removed.
SWMP changes shall be made prior to changes in the site conditions, except as allowed for in paragraph d, below.
SWMP revisions may include, but are not limited to: potential pollutant source identification; selection of
appropriate BMPs for site conditions; BMP maintenance procedures; and interim and final stabilization practices.
The SWMP changes may include a schedule for further BMP design and implementation, provided that, if any
interim BMPs are needed to comply with the permit, they are also included in the SWMP and implemented during
the interim period.
d) Responsive SWMP Changes: SWMP changes addressing BMP installation and/or implementation are often
required to be made in response to changing conditions, or when current BMPs are determined ineffective. The
majority of SWMP revisions to address these changes can be made immediately with quick in- the -field revisions to
the SWMP. In the less common scenario where more complex development of materials to modify the SWMP is
necessary, SWMP revisions shall be made in accordance with the following requirements:
1) the SWMP shall be revised as soon as practicable, but in no case more than 72 hours after the change(s) in
BMP installation and/or implementation occur at the site, and
2) a notation must be included in the SWMP prior to the site change(s) that includes the time and date of the
change(s) in the field, an identification of the BMP(s) removed or added, and the location(s) of those BMP(s).
6. Inspections
Site inspections must be conducted in accordance with the following requirements and minimum schedules. The required
minimum inspection schedules do not reduce or eliminate the permittee's responsibility to implement and maintain BMPs
in good and effective operational condition, and in accordance with the SWMP, which could require more frequent
inspections.
a) Minimum Inspection Schedule: The permittee shall, at a minimum, make a thorough inspection, in accordance
with the requirements in I.D.6.b below, at least once every 14 calendar days. Also, post -storm event inspections
must be conducted within 24 hours after the end of any precipitation or snowmelt event that causes surface erosion.
Provided the timing is appropriate, the post -storm inspections may be used to fulfill the 14 -day routine inspection
requirement. A more frequent inspection schedule than the minimum inspections described may be necessary, to
ensure that BMPs continue to operate as needed to comply with the permit. The following conditional modifications
to this Minimum Inspection Schedule are allowed:
1) Post -Storm Event Inspections at Temporarily Idle Sites — If no construction activities will occur following a
storm event, post -storm event inspections shall be conducted prior to re- commencing construction activities,
but no later than 72 hours following the storm event. The occurrence of any such delayed inspection must be
documented in the inspection record. Routine inspections still must be conducted at least every 14 calendar
days.
2) Inspections at Completed Sites /Areas — For sites or portions of sites that meet the following criteria, but final
stabilization has not been achieved due to a vegetative cover that has not become established, the permittee
shall make a thorough inspection of their stormwater management system at least once every month, and post -
storm event inspections are not required. This reduced inspection schedule is only allowed if:
i) all construction activities that will result in surface ground disturbance are completed;
ii) all activities required for final stabilization, in accordance with the SWMP, have been completed, with
the exception of the application of seed that has not occurred due to seasonal conditions or the necessity
for additional seed application to augment previous efforts; and
iii) the SWMP has been amended to indicate those areas that will be inspected in accordance with the
reduced schedule allowed for in this paragraph.
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Permit No. COR- 030000
D. TERMS AND CONDITIONS (cont.)
3) Winter Conditions Inspections Exclusion — Inspections are not required at sites where construction activities
are temporarily halted, snow cover exists over the entire site for an extended period, and melting conditions
posing a risk of surface erosion do not exist. This exception is applicable only during the period where melting
conditions do not exist, and applies to the routine 14 -day and monthly inspections, as well as the post- storm-
event inspections. The following information must be documented in the inspection record for use of this
exclusion: dates when snow cover occurred, date when construction activities ceased, and date melting
conditions began. Inspections, as described above, are required at all other times.
When site conditions make the schedule required in this section impractical, the permittee may petition the Division
to grant an alternate inspection schedule.
b) Inspection Requirements
1) Inspection Scope - The construction site perimeter, all disturbed areas, material and/or waste storage areas that
are exposed to precipitation, discharge locations, and locations where vehicles access the site shall be inspected
for evidence of, or the potential for, pollutants leaving the construction site boundaries, entering the stormwater
drainage system, or discharging to state waters. All erosion and sediment control practices identified in the
SWMP shall be evaluated to ensure that they are maintained and operating correctly.
2) Inspection Report/Records - The permittee shall keep a record of inspections. Inspection reports must
identify any incidents of non - compliance with the terms and conditions of this permit. Inspection records must
be retained for three years from expiration or inactivation of permit coverage. At a minimum, the inspection
report must include:
i) The inspection date;
ii) Name(s) and title(s) of personnel making the inspection;
iii) Location(s) of discharges of sediment or other pollutants from the site;
iv) Location(s) of BMPs that need to be maintained;
v) Location(s) of BMPs that failed to operate as designed or proved inadequate for a particular location;
vi) Location(s) where additional BMPs are needed that were not in place at the time of inspection;
vii) Deviations from the minimum inspection schedule as provided in Part I.D.6.a above;
vii) Description of corrective action for items iii, iv, v, and vi, above, dates corrective action(s) taken, and
measures taken to prevent future violations, including requisite changes to the SWMP, as necessary; and
viii) After adequate corrective action(s) has been taken, or where a report does not identify any incidents
requiring corrective action, the report shall contain a signed statement indicating the site is in compliance
with the permit to the best of the signer's knowledge and belief.
c) Required Actions Following Site Inspections — Where site inspections note the need for BMP maintenance
activities, BMPs must be maintained in accordance with the SWMP and Part I.D.7 of the permit. Repair,
replacement, or installation of new BMPs determined necessary during site inspections to address ineffective or
inadequate BMPs must be conducted in accordance with Part I.D.8 of the permit. SWMP updates required as a
result of deficiencies in the SWMP noted during site inspections shall be made in accordance with Part I.D.5.c of the
permit.
7. BMP Maintenance
All erosion and sediment control practices and other protective measures identified in the SWMP must be maintained in
effective operating condition. Proper selection and installation of BMPs and implementation of comprehensive Inspection
and Maintenance procedures, in accordance with the SWMP, should be adequate to meet this condition. BMPs that are not
adequately maintained in accordance with good engineering, hydrologic and pollution control practices, including removal
of collected sediment outside the acceptable tolerances of the BMPs, are considered to be no longer operating effectively
and must be addressed in accordance with Part I.D.8, below. A specific timeline for implementing maintenance
procedures is not included in this permit because BMP maintenance is expected to be proactive, not responsive.
Observations resulting in BMP maintenance activities can be made during a site inspection, or during general observations
of site conditions.
PART I
Permit - Page 14
Permit No. COR- 030000
D. TERMS AND CONDITIONS (cont.)
8. Replacement and Failed BMPs
Adequate site assessment must be performed as part of comprehensive Inspection and Maintenance procedures, to assess
the adequacy of BMPs at the site, and the necessity of changes to those BMPs to ensure continued effective performance.
Where site assessment results in the determination that new or replacement BMPs are necessary, the BMPs must be
installed to ensure on -going implementation of BMPs as per Part I.D.2.
Where BMPs have failed, resulting in noncompliance with Part I.D.2, they must be addressed as soon as possible,
immediately in most cases, to minimize the discharge of pollutants.
When new BMPs are installed or BMPs are replaced, the SWMP must be updated in accordance with Part I.D.5(c).
9. Reporting
No scheduled reporting requirements are included in this permit; however, the Division reserves the right to request that a
copy of the inspection reports be submitted.
10. SWMP Availability
A copy of the SWMP shall be provided upon request to the Division, EPA, or any local agency in charge of approving
sediment and erosion plans, grading plans or stormwater management plans, and within the time frame specified in the
request. If the SWMP is required to be submitted to any of these entities, it must include a signed certification in
accordance with Part I.F. 1 of the permit, certifying that the SWMP is complete and meets all permit requirements.
All SWMPs required under this permit are considered reports that shall be available to the public under Section 308(b) of
the CWA and Section 61.5(4) of the Colorado Discharge Permit System Regulations. The permittee shall make plans
available to members of the public upon request. However, the permittee may claim any portion of a SWMP as
confidential in accordance with 40 CFR Part 2.
11. Total Maximum Daily Load (TMDL)
If a TMDL has been approved for any waterbody into which the permittee discharges, and stormwater discharges
associated with construction activity have been assigned a pollutant - specific Wasteload Allocation (WLA) under the
TMDL, the Division will either:
a) Ensure that the WLA is being implemented properly through alternative local requirements, such as by a municipal
stormwater permit; or
b) Notify the permittee of the WLA, and amend the permittee's certification to add specific BMPs and /or other
requirements, as appropriate. The permittee may be required to do the following:
1) Under the permittee's SWMP, implement specific management practices based on requirements of the WLA,
and evaluate whether the requirements are being met through implementation of existing stormwater BMPs or
if additional BMPs are necessary. Document the calculations or other evidence that show that the requirements
are expected to be met; and
2) If the evaluation shows that additional or modified BMPs are necessary, describe the type and schedule for the
BMP additions /revisions.
Discharge monitoring may also be required. The permittee may maintain coverage under the general permit provided they
comply with the applicable requirements outlined above. The Division reserves the right to require individual or alternate
general permit coverage.
PART I
Permit - Page 15
Permit No. COR- 030000
E. ADDITIONAL DEFINITIONS
For the purposes of this permit:
1. Best Management Practices (BMPs): schedules of activities, prohibitions of practices, maintenance procedures, and
other management practices to prevent or reduce the pollution of waters of the State. BMPs also include treatment
requirements, operating procedures, pollution prevention, and practices to control site runoff, spillage or leaks, waste
disposal, or drainage from material storage.
2. Dedicated asphalt plants and concrete plants: portable asphalt plants and concrete plants that are located on or adjacent
to a construction site and that provide materials only to that specific construction site.
3. Final stabilization: when all ground surface disturbing activities at the site have been completed, and uniform vegetative
cover has been established with an individual plant density of at least 70 percent of pre- disturbance levels, or equivalent
permanent, physical erosion reduction methods have been employed. For purposes of this permit, establishment of a
vegetative cover capable of providing erosion control equivalent to pre- existing conditions at the site will be considered
final stabilization.
4. Municipal separate storm sewer system: a conveyance or system of conveyances (including: roads with drainage
systems, municipal streets, catch basins, curbs, gutters, ditches, man -made channels, or storm drains), owned or operated
by a State, city, town, county, district, or other public body (created by state law), having jurisdiction over disposal of
sewage, industrial waste, stormwater, or other wastes; designed or used for collecting or conveying stormwater.
5. Operator: the entity that has day -to -day supervision and control of activities occurring at the construction site. This can
be the owner, the developer, the general contractor or the agent of one of these parties, in some circumstances. It is
anticipated that at different phases of a construction project, different types of parties may satisfy the definition of
'operator' and that the permit may be transferred as the roles change.
6. Outfall: a point source at the point where stormwater leaves the construction site and discharges to a receiving water or a
stormwater collection system.
7. Part of a larger common plan of development or sale: a contiguous area where multiple separate and distinct
construction activities may be taking place at different times on different schedules.
8. Point source: any discernible, confined and discrete conveyance from which pollutants are or may be discharged. Point
source discharges of stormwater result from structures which increase the imperviousness of the ground which acts to
collect runoff, with runoff being conveyed along the resulting drainage or grading pattern.
9. Pollutant: dredged spoil, dirt, slurry, solid waste, incinerator residue, sewage, sewage sludge, garbage, trash, chemical
waste, biological nutrient, biological material, radioactive material, heat, wrecked or discarded equipment, rock, sand, or
any industrial, municipal or agricultural waste.
10. Process water: any water which, during manufacturing or processing, comes into contact with or results from the
production of any raw material, intermediate product, finished product, by product or waste product. This definition
includes mine drainage.
11. Receiving Water: any classified stream segment (including tributaries) in the State of Colorado into which stormwater
related to construction activities discharges. This definition includes all water courses, even if they are usually dry, such as
borrow ditches, arroyos, and other unnamed waterways.
12. Significant Materials include, but are not limited to: raw materials; fuels; materials such as solvents, detergents, and
plastic pellets; finished materials such as metallic products; raw materials used in food processing or production; hazardous
substances designated under section 101(14) of CERCLA; any chemical the facility is required to report pursuant to
section 313 of title III of SARA; fertilizers; pesticides; and waste products such as ashes, slag and sludge that have the
potential to be released with stormwater discharge.
13. Stormwater: precipitation- induced surface runoff.
PART I
Permit - Page 16
Permit No. COR- 030000
F. GENERAL REQUIREMENTS
1. Signatory Requirements
a) All reports required for submittal shall be signed and certified for accuracy by the permittee in accordance with the
following criteria:
1) In the case of corporations, by a principal executive officer of at least the level of vice - president or his or her
duly authorized representative, if such representative is responsible for the overall operation of the facility from
which the discharge described in the form originates;
2) In the case of a partnership, by a general partner;
3) In the case of a sole proprietorship, by the proprietor;
4) In the case of a municipal, state, or other public facility, by either a principal executive officer, ranking elected
official, or other duly authorized employee, if such representative is responsible for the overall operation of the
facility from which the discharge described in the form originates.
b) Changes to authorization. If an authorization under paragraph a) of this section is no longer accurate because a
different individual or position has responsibility for the overall operation of the facility, a new authorization
satisfying the requirements of paragraph a) of this section must be submitted to the Division, prior to or together
with any reports, information, or applications to be signed by an authorized representative.
c) Certification. Any person signing a document under paragraph a) of this section shall make the following
certification:
"I certify under penalty of law that this document and all attachments were prepared under my direction or
supervision in accordance with a system designed to assure that qualified personnel properly gather and
evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or
those persons directly responsible for gathering the information, the information submitted is, to the best of my
knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for
submitting false information, including the possibility of fine and imprisonment for knowing violations."
2. Retention of Records
a) The permittee shall retain copies of the SWMP and all reports required by this permit and records of all data used to
complete the application to be covered by this permit, for three years after expiration or inactivation of permit
coverage.
b) The permittee shall retain a copy of the SWMP required by this permit at the construction site from the date of
project initiation to the date of expiration or inactivation of permit coverage, unless another location, specified by
the permittee, is approved by the Division.
3. Monitoring
The Division reserves the right to require sampling and testing, on a case -by -case basis (see Part I.D.1.e), for example to
implement the provisions of a TMDL (see Part I.D.11 of the permit). Reporting procedures for any monitoring data
collected will be included in the notification by the Division of monitoring requirements.
If monitoring is required, the following definitions apply:
a) The thirty (30) day average shall be determined by the arithmetic mean of all samples collected during a thirty (30)
consecutive -day period.
b) A grab sample, for monitoring requirements, is a single "dip and take" sample.
PART II
A. MANAGEMENT REQUIREMENTS
1. Amending a Permit Certification
PART II
Permit - Page 17
Permit No. COR- 030000
The permittee shall inform the Division (Permits Section) in writing of changes to the information provided in the permit
application, including the legal contact, the project legal description or map originally submitted with the application, or
the planned total disturbed acreage. The permittee shall furnish the Division with any plans and specifications which the
Division deems reasonably necessary to evaluate the effect on the discharge and receiving stream. If applicable, this
notification may be accomplished through submittal of an application for a CDPS process water permit authorizing the
discharge. The SWMP shall be updated and implemented prior to the changes (see Part I.D.5.c).
Any discharge to the waters of the State from a point source other than specifically authorized by this permit or a different
CDPS permit is prohibited.
2. Special Notifications - Definitions
a) Spill: An unintentional release of solid or liquid material which may cause pollution of state waters.
b) Upset: An exceptional incident in which there is unintentional and temporary noncompliance with permit discharge
limitations because of factors beyond the reasonable control of the permittee. An upset does not include
noncompliance to the extent caused by operational error, improperly designed treatment facilities, inadequate
treatment facilities, lack of preventative maintenance, or careless or improper operation.
3. Noncompliance Notification
a) The permittee shall report the following instances of noncompliance:
1) Any noncompliance which may endanger health or the environment;
2) Any spill or discharge of hazardous substances or oil which may cause pollution of the waters of the state.
3) Any discharge of stormwater which may cause an exceedance of a water quality standard.
b) For all instances of noncompliance based on environmental hazards and chemical spills and releases, all needed
information must be provided orally to the Colorado Department of Public Health and Environment spill reporting
line (24 -hour number for environmental hazards and chemical spills and releases: 1- 877 - 518 -5608) within 24 hours
from the time the permittee becomes aware of the circumstances.
For all other instances of noncompliance as defined in this section, all needed information must be provided orally to
the Water Quality Control Division within 24 hours from the time the permittee becomes aware of the
circumstances.
For all instances of noncompliance identified here, a written submission shall also be provided within 5 calendar
days of the time the permittee becomes aware of the circumstances. The written submission shall contain a
description of:
1) The noncompliance and its cause;
2) The period of noncompliance, including exact dates and times, and if the noncompliance has not been
corrected, the anticipated time it is expected to continue;
3) Steps taken or planned to reduce, eliminate, and prevent reoccurrence of the noncompliance.
PART II
Permit - Page 18
Permit No. COR- 030000
A. MANAGEMENT REQUIREMENTS (cont.)
4. Submission of Incorrect or Incomplete Information
Where the permittee failed to submit any relevant facts in a permit application, or submitted incorrect information in a
permit application or report to the Division, or relevant new information becomes available, the permittee shall promptly
submit the relevant application information which was not submitted or any additional information needed to correct any
erroneous information previously submitted.
5. Bypass
a) A bypass, which causes effluent limitations (i.e., requirements to implement BMPs in accordance with Parts I.B.3
and I.D.2 of the permit) to be exceeded is prohibited, and the Division may take enforcement action against a
permittee for such a bypass, unless:
1) Bypass was unavoidable to prevent loss of life, personal injury, or severe property damage;
2) There were no feasible alternatives to the bypass, such as the use of auxiliary treatment facilities (e.g.,
alternative BMPs), retention of untreated wastes, or maintenance during normal periods of equipment
downtime. This condition is not satisfied if the permittee could have installed adequate backup equipment (e.g.,
implemented additional BMPs) to prevent a bypass which occurred during normal periods of equipment
downtime or preventative maintenance; and
3) The permittee submitted notices as required in "Non- Compliance Notification," Part II.A.3.
6. Upsets
a) Effect of an Upset: An upset constitutes an affirmative defense to an action brought for noncompliance with permit
limitations and requirements if the requirements of paragraph b of this section are met. (No determination made
during administrative review of claims that noncompliance was caused by upset, and before an action for
noncompliance, is final administrative action subject to judicial review.)
b) Conditions Necessary for a Demonstration of Upset: A permittee who wishes to establish the affirmative defense
of upset shall demonstrate through properly signed contemporaneous operating logs, or other relevant evidence that:
1) An upset occurred and that the permittee can identify the specific cause(s) of the upset;
2) The permitted facility was at the time being properly operated;
3) The permittee submitted notice of the upset as required in Part II.A.3. of this permit (24 -hour notice); and
4) The permittee complied with any remedial measures required under 40 CFR Section 122.41(d) of the federal
regulations or Section 61.8(3)(h) of the Colorado Discharge Permit System Regulations.
c) Burden of Proof: In any enforcement proceeding the permittee seeking to establish the occurrence of an upset has
the burden of proof.
7. Removed Substances
Solids, sludges, or other pollutants removed in the course of treatment or control of discharges shall be properly disposed
of in a manner such as to prevent any pollutant from such materials from entering waters of the State.
8. Minimization of Adverse Impact
The permittee shall take all reasonable steps to minimize any adverse impact to waters of the State resulting from
noncompliance with any terms and conditions specified in this permit, including such accelerated or additional monitoring
as necessary to determine the nature and impact of the noncomplying discharge.
PART II
Permit - Page 19
Permit No. COR- 030000
A. MANAGEMENT REQUIREMENTS (cont.)
9. Reduction, Loss, or Failure of Stormwater Controls
The permittee has the duty to halt or reduce any activity if necessary to maintain compliance with the permit requirements.
Upon reduction, loss, or failure of any stormwater controls, the permittee shall, to the extent necessary to maintain
compliance with its permit, control production, or remove all pollutant sources from exposure to stormwater, or both, until
the stormwater controls are restored or an alternative method of treatment /control is provided.
It shall not be a defense for a permittee in an enforcement action that it would be necessary to halt or reduce the permitted
activity in order to maintain compliance with the conditions of this permit.
10. Proper Operation and Maintenance
The permittee shall at all times properly operate and maintain all facilities and systems of treatment and control (and
related appurtenances) which are installed or used by the permittee to achieve compliance with the conditions of this
permit. Proper operation and maintenance includes effective performance, adequate funding, adequate operator staffing
and training, and adequate laboratory and process controls, including appropriate quality assurance procedures. This
provision requires the operation of back -up or auxiliary facilities or similar systems only when necessary to achieve
compliance with the conditions of the permit.
B. RESPONSIBILITIES
1. Inspections and Right to Entry
The permittee shall allow the Director of the State Water Quality Control Division, the EPA Regional Administrator,
and/or their authorized representative(s), upon the presentation of credentials:
a) To enter upon the permittee's premises where a regulated facility or activity is located or in which any records are
required to be kept under the terms and conditions of this permit;
b) At reasonable times to have access to and copy any records required to be kept under the terms and conditions of
this permit and to inspect any monitoring equipment or monitoring method required in the permit; and
c) To enter upon the permittee's premises to investigate, within reason, any actual, suspected, or potential source of
water pollution, or any violation of the Colorado Water Quality Control Act. The investigation may include, but is
not limited to, the following: sampling of any discharge and /or process waters, the taking of photographs,
interviewing permittee staff on alleged violations and other matters related to the permit, and access to any and all
facilities or areas within the permittee's premises that may have any effect on the discharge, permit, or any alleged
violation.
2. Duty to Provide Information
The permittee shall furnish to the Division, within the time frame specified by the Division, any information which the
Division may request to determine whether cause exists for modifying, revoking and reissuing, or inactivating coverage
under this permit, or to determine compliance with this permit. The permittee shall also furnish to the Division, upon
request, copies of records required to be kept by this permit.
3. Transfer of Ownership or Control
Certification under this permit may be transferred to a new permittee if:
a) The current permittee notifies the Division in writing when the transfer is desired as outlined in Part I.A.7; and
b) The notice includes a written agreement between the existing and new permittees containing a specific date for
transfer of permit responsibility, coverage and liability between them; and
c) The current permittee has met all fee requirements of the Colorado Discharge Permit System Regulations, Section
61.15.
PART II
Permit - Page 20
Permit No. COR- 030000
B. RESPONSIBILITIES (cont.)
4. Modification, Suspension, or Revocation of Permit By Division
All permit modification, inactivation or revocation and reissuance actions shall be subject to the requirements of the
Colorado Discharge Permit System Regulations, Sections 61.5(2), 61.5(3), 61.7 and 61.15, 5 C.C.R. 1002 -61, except for
minor modifications.
a) This permit, and/or certification under this permit, may be modified, suspended, or revoked in whole or in part
during its term for reasons determined by the Division including, but not limited to, the following:
1) Violation of any terms or conditions of the permit;
2) Obtaining a permit by misrepresentation or failing to disclose any fact which is material to the granting or
denial of a permit or to the establishment of terms or conditions of the permit;
3) Materially false or inaccurate statements or information in the application for the permit;
4) Promulgation of toxic effluent standards or prohibitions (including any schedule of compliance specified in
such effluent standard or prohibition) which are established under Section 307 of the Clean Water Act, where
such a toxic pollutant is present in the discharge and such standard or prohibition is more stringent than any
limitation for such pollutant in this permit.
b) This permit, and/or certification under this permit, may be modified in whole or in part due to a change in any
condition that requires either a temporary or permanent reduction or elimination of the permitted discharge, such as:
1) Promulgation of Water Quality Standards applicable to waters affected by the permitted discharge; or
2) Effluent limitations or other requirements applicable pursuant to the State Act or federal requirements; or
3) Control regulations promulgated; or
4) Other available information indicates a potential for violation of adopted Water Quality Standards or stream
classifications.
c) This permit, or certification under this permit, may be modified in whole or in part to include new effluent
limitations and other appropriate permit conditions where data submitted pursuant to Part I indicate that such
effluent limitations and permit conditions are necessary to ensure compliance with applicable water quality
standards and protection of classified uses.
d) At the request of the permittee, the Division may modify or inactivate certification under this permit if the following
conditions are met:
1) In the case of inactivation, the permittee notifies the Division of its intent to inactivate the certification, and
certifies that the site has been finally stabilized;
2) In the case of inactivation, the permittee has ceased any and all discharges to state waters and demonstrates to
the Division there is no probability of further uncontrolled discharge(s) which may affect waters of the State.
3) The Division finds that the permittee has shown reasonable grounds consistent with the Federal and State
statutes and regulations for such modification, amendment or inactivation;
4) Fee requirements of Section 61.15 of the Colorado Discharge Permit System Regulations have been met; and
5) Applicable requirements of public notice have been met.
For small construction sites covered by a Qualifying Local Program, coverage under this permit is automatically
terminated when a site has been finally stabilized.
PART II
Permit - Page 21
Permit No. COR- 030000
B. RESPONSIBILITIES (cont.)
5. Permit Violations
Failure to comply with any terms and /or conditions of this permit shall be a violation of this permit.
Dischargers of stormwater associated with industrial activity, as defined in the EPA Stormwater Regulation (40 CFR
122.26(b)(14) and Section 61.3(2) of the Colorado Discharge Permit System Regulations, which do not obtain coverage
under this or other Colorado general permits, or under an individual CDPS permit regulating industrial stormwater, will be
in violation of the federal Clean Water Act and the Colorado Water Quality Control Act, 25 -8 -101, as amended. Failure to
comply with CDPS permit requirements will also constitute a violation.
6. Legal Responsibilities
The issuance of this permit does not convey any property or water rights in either real or personal property, or stream
flows, or any exclusive privileges, nor does it authorize any injury to private property or any invasion of personal rights,
nor any infringement of Federal, State or local laws or regulations.
Nothing in this permit shall be construed to preclude the institution of any legal action or relieve the permittee from any
responsibilities, liabilities, or penalties established pursuant to any applicable State law or regulation under authority
granted by Section 510 of the Clean Water Act.
7. Severability
The provisions of this permit are severable. If any provisions of this permit, or the application of any provision of this
permit to any circumstance, are held invalid, the application of such provision to other circumstances and the application of
the remainder of this permit shall not be affected.
8. Renewal Application
If the permittee desires to continue to discharge, a permit renewal application shall be submitted at least ninety (90) days
before this permit expires. If the permittee anticipates that there will be no discharge after the expiration date of this
permit, the Division should be promptly notified so that it can inactivate the certification in accordance with Part II.B.4.d.
9. Confidentiality
Except for data determined to be confidential under Section 308 of the Federal Clean Water Act and Colorado Discharge
Permit System Regulations, Section 61.5(4), all reports prepared in accordance with the terms of this permit shall be
available for public inspection at the offices of the Division. The permittee must state what is confidential at the time of
submittal.
Any information relating to any secret process, method of manufacture or production, or sales or marketing data which has
been declared confidential by the permittee, and which may be acquired, ascertained, or discovered, whether in any
sampling investigation, emergency investigation, or otherwise, shall not be publicly disclosed by any member, officer, or
employee of the Commission or the Division, but shall be kept confidential. Any person seeking to invoke the protection
of this section shall bear the burden of proving its applicability. This section shall never be interpreted as preventing full
disclosure of effluent data.
10. Fees
The permittee is required to submit payment of an annual fee as set forth in the Water Quality Control Act. Failure to
submit the required fee when due and payable is a violation of the permit and will result in enforcement action pursuant to
Section 25 -8 -601 et. seq., C.R.S. 1973 as amended.
PART II
Permit - Page 22
Permit No. COR- 030000
B. RESPONSIBILITIES (cont.)
11. Requiring an Individual CDPS Permit
The Director may require the permittee to apply for and obtain an individual or alternate general CDPS permit if:
a) The discharger is not in compliance with the conditions of this general permit;
b) Conditions or standards have changed so that the discharge no longer qualifies for a general permit; or
c) Data /information become available which indicate water quality standards may be violated.
The permittee must be notified in writing that an application for an individual or alternate general CDPS permit is required.
When an individual or alternate general CDPS permit is issued to an operator otherwise covered under this general permit,
the applicability of this general permit to that operator is automatically inactivated upon the effective date of the individual
or alternate general CDPS permit.
Appendix B
NRCS Unit Map
Soils Descriptions
Map Unit Description: Arvada loam, 1 to 6 percent slopes —Rifle Area, Colorado,
Parts of Garfield and Mesa Counties
Rifle Area, Colorado, Parts of Garfield and Mesa
Counties
3— Arvada loam, 1 to 6 percent slopes
Map Unit Setting
Elevation: 5,100 to 6,200 feet
Map Unit Composition
Arvada and similar soils: 80 percent
Minor components: 5 percent
Description of Arvada
Setting
Landform: Terraces, fans
Landform position (three - dimensional): Tread
Down -slope shape: Convex, linear
Across -slope shape: Convex, linear
Parent material: Highly saline alluvium derived from sandstone and
shale
Properties and qualities
Slope: 1 to 6 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Well drained
Capacity of the most limiting layer to transmit water
(Ksat): Moderately low to moderately high (0.06 to 0.20 in /hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Calcium carbonate, maximum content: 10 percent
Gypsum, maximum content: 2 percent
Maximum salinity: Very slightly saline to moderately saline (4.0 to
16.0 mmhos /cm)
Sodium adsorption ratio, maximum: 30.0
Available water capacity: Moderate (about 8.0 inches)
Interpretive groups
Land capability classification (irrigated): 7s
Land capability (nonirrigated): 7s
Ecological site: Salt Flats (R048AY261 C0)
Typical profile
0 to 3 inches: Loam
3 to 17 inches: Silty clay loam
17 to 60 inches: Silty clay loam
Minor Components
Wann
Percent of map unit: 5 percent
Landform: Terraces
USDA Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
12/6/2011
Page 1 of 2
Map Unit Description: Arvada loam, 1 to 6 percent slopes —Rifle Area, Colorado,
Parts of Garfield and Mesa Counties
Landform position (three- dimensional): Tread
Data Source Information
Soil Survey Area: Rifle Area, Colorado, Parts of Garfield and Mesa Counties
Survey Area Data: Version 6, Mar 25, 2008
USDA Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
12/6/2011
Page 2 of 2
Map Unit Description: Nihill channery loam, 6 to 25 percent slopes —Rifle Area,
Colorado, Parts of Garfield and Mesa Counties
Rifle Area, Colorado, Parts of Garfield and Mesa
Counties
47— Nihill channery loam, 6 to 25 percent slopes
Map Unit Setting
Elevation: 5,000 to 6,500 feet
Map Unit Composition
Nihill and similar soils: 85 percent
Description of Nihill
Setting
Landform: Valley sides, alluvial fans
Down -slope shape: Convex, linear
Across -slope shape: Convex, linear
Parent material: Alluvium derived from sandstone and shale
Properties and qualities
Slope: 6 to 25 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Well drained
Capacity of the most limiting layer to transmit water
(Ksat): Moderately high to high (0.60 to 6.00 in /hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Calcium carbonate, maximum content: 15 percent
Gypsum, maximum content: 1 percent
Maximum salinity: Nonsaline to very slightly saline (0.0 to 4.0 mmhos/
cm)
Available water capacity: Low (about 3.6 inches)
Interpretive groups
Land capability (nonirrigated): 6e
Ecological site: Rolling Loam (R048AY298C0)
Typical profile
0 to 11 inches: Channery loam
11 to 18 inches: Very channery loam
18 to 60 inches: Stratified extremely channery sandy loam to
extremely channery loam
Data Source Information
Soil Survey Area: Rifle Area, Colorado, Parts of Garfield and Mesa Counties
Survey Area Data: Version 6, Mar 25, 2008
USDA Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
12/6/2011
Page 1 of 1
F: /Projects /011 -2618 PDC Land Farm Stormwater /GIS
, 'r�
/4*-441:-
I ,125 15000 ' I
Feet
PROJECT: 011 -2618
REVISED BY: SBS I
DATE: 1/4/2013
Legend
Permitted Area
Arvada Loam,
1 to 6 percent slopes
47 Nihill channery loam,
6 to 25 percent slopes
SW NRCS Soils Map
Piceance Centralized Soil Treatment Facility
PDC Energy, Inc.
SW 1/4 S25 T6 R95W
OLSSON
ASSOCIATES
826 21 1/2 Road
Grand Junction, Colorado 81505
P: 970-263-7800
F: 970-263-7456
FIGURE
3
Appendix C
Site Map
OLSSON
ASSOCIATES
EXISTIJG SWALE
TO ROMAN
V
SWALE
3
ACCESS GATE
RCP CULVERT
FIRE ACCESS ROAD
DIMING SWALE
TO REMAIN
RCP CULVERT (TV.)
CELL ACCESS {TYP)
R2O' TYP.
B' CHAIN UNK FEF4CE
/
SWALE
SEE GRADING PLAN
30'
/
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/ �f
/ /
\\
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/
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LEGEND
/ Construction boundary
Sediment control logs (j- hooked)
Diversion with check dams or riprap
VDirection of flow
SITE DESCRIPTION
Disturbed Acreage: —10 acres
Receiving Water: ephemeral drainage to
Colorado River (shown above as "existing
swale ")
Pre - disturbance/ Reference Vegetation:
vegetation type and percentage not yet
assessed
Seeding Info: site not yet seeded
Map Revision Date: 1/3/2013
STORMWATER SITE MAP
PICEANCE CENTRALIZED
SOIL TREATMENT FACILITY
PDC ENERGY, INC.
GARFIELD COUNTY, COLORADO
SW 1/4, Section 25, Township 6S, Range 95W
ENERGY
NOT TO SCALE
Appendix D
BMP Manual — See BMP Manual Tab
Stormwater BMP Manual
Petroleum Development Corporation
Table of Contents
Erosion Controls
EC -1 Surface Roughening (SR)
EC -2 Temporary and Permanent Seeding (TS /PS)
EC -3 Soil Binders (SB)
EC -4 Mulching (MU)
EC -5 Compost Blanket and Filter Berm (CB)
EC -6 Rolled Erosion Control Products (RECP) (multiple types)
EC -7 Temporary Slope Drains (TSD)
EC -8 Rock Lined Channel
EC -9 Rough Cut Street Control (RCS)
EC -10 Earth Dikes and Drainage Swales (ED /DS)
EC -11 Terracing (TER)
EC -12 Check Dams (CD) (multiple types)
EC -13 Streambank Stabilization (SS)
EC -14 Wind Erosion / Dust Control (DC)
EC -15 Culvert (C)
EC -16 Culvert Protection (CP)
EC -17 Diversion (D)
EC -18 Drainage Dip (DD)
EC -19 Riprap (R)
EC -20 Roadside Ditch (RSD) and Turnout (TO)
EC -21 Water Bar (WB)
Materials Management
MM -1 Concrete Washout Area (CWA)
MM -2 Stockpile Management (SP) (multiple types)
MM -3 Good Housekeeping Practices (GH)
Sediment Controls
SC -1 Silt Fence (SF)
SC -2 Sediment Control Log (SCL)
SC -3 Straw Bale Barrier (SBB)
SC -4 Brush Barrier (BB)
SC -5 Rock Sock (RS)
SC -6 Filter Berm (FB)
SC -7 Sediment Basin (SB)
SC -8 Sediment Trap (ST)
SC -9 Vegetative Buffers (VB)
SC -10 Chemical Treatment (CT)
Site Management and Other Specific Practices
SM -1 Construction Phasing /Sequencing (CP)
SM -2 Protection of Existing Vegetation (PV)
SM -3 Construction Fence (CF)
SM -4 Vehicle Tracking Control (VTC) (multiple types)
SM -5 Stabilized Construction Roadway (SCR)
SM -6 Stabilized Staging Area (SSA)
SM -7 Land Grading (LG)
SM -8 Temporary Diversion Channel (TDC)
SM -9 Dewatering Operations (DW)
SM -10 Temporary Stream Crossing (TSC) (multiple types)
SM -11 Temporary Batch Plant (TBP)
SM -12 Paving and Grinding Operations (PGO)
SM -13 Retaining Wall (RW)