HomeMy WebLinkAbout1.05 SPCC PlanWestern Slope Materials
SPCC Plan – North Hangs Mine
November 2021
Prepared by:
II
Lewicki & Associates
SPCC - North Hangs Mine
November 2021
Table of Contents
INTRODUCTION 1
PART 1: PLAN ADMINISTRATION 3
1.1 Management Approval and Designated Person (40 CFR 112.7) ...................................3
1.2 Professional Engineer Certification (40 CFR 112.3(d)) ..................................................4
1.3 Location of SPCC Plan (40 CFR 112.3(e)) ....................................................................5
1.4 Plan Review (40 CFR 112.3 and 112.5) ........................................................................5
1.5 Facilities, Procedures, Methods, or Equipment Not Yet Fully Operational (40 CFR
112.7) 6
1.6 Cross-Reference with SPCC Provisions (40 CFR 112.7) ..............................................6
PART 2: GENERAL FACILITY INFORMATION 9
2.1 Facility Description (40 CFR 112.7(a)(3)) ......................................................................9
2.1.1 Location and Activities ...............................................................................................9
2.2 Evaluation of Discharge Potential ...............................................................................11
PART 3: DISCHARGE PREVENTION - GENERAL SPCC PROVISIONS 12
3.1 Compliance with Applicable Requirements (40 CFR 112.7(a)(2)) ...............................12
3.2 Facility Layout Diagram (40 CFR 112.7(a)(3)) .............................................................12
3.3 Spill Reporting (40 CFR 112.7(a)(4))...........................................................................12
3.4 Potential Discharge Volumes and Direction of Flow (40 CFR 112.7(b)) ......................12
3.5 Containment and Diversionary Structures (40 CFR 112.7(c))......................................14
3.6 Practicability of Secondary Containment (40 CFR 112.7(d)) .......................................14
3.7 Inspections, Tests, and Records (40 CFR 112.7(e)) ...................................................14
3.9 Security (40 CFR 112.7(g)) .........................................................................................23
3.10 Tank Truck Loading/Unloading Rack Requirements (40 CFR 112.7(h)) ..................23
3.11 Brittle Fracture Evaluation (40 CFR 112.7(i)) ...........................................................25
3.12 Conformance with State and Local Applicable Requirements (40 CFR 112.7(j)) .....25
PART 4: DISCHARGE PREVENTION – SPCC Provisions for Onshore Facilities (Excluding
Production Facilities) 26
4.1 Facility Drainage (40 CFR 112.8(b))............................................................................26
4.2 Bulk Storage Containers (40 CFR 112.8(c)) ................................................................27
4.3 Transfer Operations, Pumping, and In-Plant Processes (40 CFR 112.8(d)) ................32
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November 2021
PART 5: DISCHARGE RESPONSE 34
5.1 Minor Spill Response .....................................................................................................35
5.2 Response to a Major Discharge .......................................................................................36
5.3 Waste Disposal ..............................................................................................................37
5.4 Spill Notification Forms and Discharge Notification ......................................................37
5.5 Cleanup Contractors and Equipment Suppliers ...............................................................38
APPENDIX A – FIGURES 44
APPENDIX B – ULTRASONIC SHELL TEST PROTOCOL 45
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INTRODUCTION
Purpose
The purpose of this Spill Prevention, Control, and Countermeasure (SPCC) Plan is to describe
measures implemented by Western Slope Materials to prevent oil discharges from occurring, and to
prepare Western Slope Materials to respond in a safe, effective, and timely manner to mitigate the
impacts of a discharge.
This Plan has been prepared to meet the requirements of Title 40, Code of Federal Regulations, Part
112 (40 CFR part 112).
In addition to fulfilling requirements of 40 CFR part 112, this SPCC Plan is used as a reference for oil
storage information and testing records, as a tool to communicate practices on preventing and
responding to discharges with employees, as a guide to facility inspections, and as a resource during
emergency response.
Western Slope Materials management has determined that this facility does not pose a risk of
substantial harm under 40 CFR part 112, as recorded in the “Substantial Harm Determination” included
in this Plan.
This Plan provides guidance on key actions that Western Slope Materials must perform to comply with
the SPCC rule:
Complete monthly and annual site inspections as outlined in the Inspection, Tests, and Records section
of this Plan (Section 3.7) using the inspection checklists.
• Perform preventive maintenance of equipment, secondary containment systems, and discharge
prevention systems described in this Plan as needed to keep them in proper operating conditions.
• Conduct annual employee training as outlined in the Personnel, Training, and Spill Prevention
Procedures section of this Plan (Section 3.8) and document them on the log.
• If either of the following occurs, submit the SPCC Plan to the EPA Region 8 Regional Administrator
(RA) and the Colorado Department of Public Health and Environment (CDPHE), along with other
information as detailed in Section 5 of this Plan:
o The facility discharges more than 1,000 gallons of oil into or upon the navigable waters of
the U.S. or adjoining shorelines in a single spill event; or
o The facility discharges oil in quantity greater than 42 gallons in each of two spill events
within any 12-month period.
• Review the SPCC Plan at least once every five (5) years and amend it to include more effective
prevention and control technology, if such technology will significantly reduce the likelihood of a
spill event and has been proven effective in the field at the time of the review. Plan amendments,
other than administrative changes discussed above, must be recertified by a Professional Engineer on
the certification page in Section 1.2 of this Plan.
• Amend the SPCC Plan within six (6) months whenever where is a change in facility design,
construction, operation, or maintenance that materially affects the facility’s spill potential. The
revised Plan must be recertified by a Professional Engineer (PE).
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Review the Plan on an annual basis. Update the Plan to reflect any “administrative changes” that are
applicable, such as personnel changes or revisions to contact information, such as phone numbers.
Administrative changes must be documented in the Plan review log, but do not have to be certified by a
PE.
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PART 1: PLAN ADMINISTRATION
1.1 Management Approval and Designated Person (40 CFR 112.7)
Western Slope Materials is committed to preventing discharges of oil to navigable waters and the
environment, and to maintaining the highest standards for spill prevention control and countermeasures
through the implementation and regular review and amendment to the Plan. This SPCC Plan has the
full approval of Western Slope Materials management. Western Slope Materials has committed the
necessary resources to implement the measures described in this Plan.
The Facility Manager is the Designated Person Accountable for Oil Spill Prevention at the facility
and has the authority to commit the necessary resources to implement this Plan.
Authorized Facility Representative (facility response coordinator): ______________________________
Signature:
Title:
Date:
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1.2 Professional Engineer Certification (40 CFR 112.3(d))
The undersigned Registered Professional Engineer is familiar with the requirements of Part 112 of Title
40 of the Code of Federal Regulations (40 CFR part 112) and has visited and examined the facility, or
has supervised examination of the facility by appropriately qualified personnel. The undersigned
Registered Professional Engineer attests that this Spill Prevention, Control, and Countermeasure Plan
has been prepared in accordance with good engineering practice, including consideration of applicable
industry standards and the requirements of 40 CFR part 112; that procedures for required inspections
and testing have been established; and that this Plan is adequate for the facility. [40 CFR 112.3(d)]
This certification in no way relieves the owner or operator of the facility of his/her duty to prepare and
fully implement this SPCC Plan in accordance with the requirements of 40 CFR part 112. This Plan is
valid only to the extent that the facility owner or operator maintains, tests, and inspects equipment,
containment, and other devices as prescribed in this Plan.
1.2.1 Required Improvements
The Professional Engineer’s certification of this plan is contingent on the following facility improvements
being implemented for compliance with SPCC regulations 40 CFR 112:
1) Stormwater control structure must be installed along the perimeter of the
processing area to separate from adjacent uses. Complete within the first six months
following the start of mining.
Name:
State and Registration #:
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1.3 Location of SPCC Plan (40 CFR 112.3(e))
In accordance with 40 CFR 112.3(e)(2), a complete copy of this SPCC Plan is maintained at the
Western Slope Materials mine in Silt, CO.
1.4 Plan Review (40 CFR 112.3 and 112.5)
1.4.1 Changes in Facility Configuration
In accordance with 40 CFR 112.5(a), Western Slope Materials periodically reviews and evaluates this
SPCC Plan for any change in the facility design, construction, operation, or maintenance that materially
affects the facility’s potential for an oil discharge, including, but not limited to:
• commissioning of containers;
• reconstruction, replacement, or installation of piping systems;
• construction or demolition that might alter secondary containment structures; or
• changes of product or service, revisions to standard operation, modification of testing/inspection
procedures, and use of new or modified industry standards or maintenance procedures.
Amendments to the Plan made to address changes of this nature are referred to as technical
amendments, and must be certified by a PE. Non-technical amendments can be done (and must be
documented in this section) by the facility owner and/or operator. Non-technical amendments include
the following:
• change in the name or contact information (i.e., telephone numbers) of individuals responsible for
the implementation of this Plan; or
• change in the name or contact information of spill response or cleanup contractors.
Western Slope Materials must make the needed revisions to the SPCC Plan as soon as possible, but
no later than six months after the change occurs. The Plan must be implemented as soon as possible
following any technical amendment, but no later than six months from the date of the amendment. The
Facility Manager is responsible for initiating and coordinating revisions to the SPCC Plan.
1.4.2 Scheduled Plan Reviews
In accordance with 40 CFR 112.5(b), Western Slope Materials reviews this SPCC Plan at least once
every five years. Revisions to the Plan, if needed, are made within six months of the five-year review. A
registered Professional Engineer certifies any technical amendment to the Plan, as described above, in
accordance with 40 CFR 112.3(d). This Plan is dated November 8, 2021. The next plan review is
therefore scheduled to take place on or prior to Date, 202 6.
1.4.3 Record of Plan Reviews
Scheduled reviews and Plan amendments are recorded in the Plan Review Log. This log must be
completed even if no amendment is made to the Plan as a result of the review. Unless a technical or
administrative change prompts an earlier review of the Plan, the next scheduled review of this Plan
must occur by October ##, 2026.
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1.5 Facilities, Procedures, Methods, or Equipment Not Yet Fully
Operational (40 CFR 112.7)
Bulk storage containers at this facility have never been tested for integrity since their installation.
Section 4.2.6 of this Plan describes the inspection program to be implemented by the facility following a
regular schedule, including the dates by which each of the bulk storage containers must be tested.
1.6 Cross-Reference with SPCC Provisions (40 CFR 112.7)
This SPCC Plan does not follow the exact order presented in 40 CFR part 112. Section headings
identify, where appropriate, the relevant section(s) of the SPCC rule. Table 1-2 presents a cross-
reference of Plan sections relative to applicable parts of 40 CFR part 112.
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Table 1-1: Plan Review Log
By Date Activity
PE
certification
required? Comments
Ben
Langenfeld
MONTH ##, 2021 Writing
plan
Yes Initial SPCC plan
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Table 1-2: SPCC Plan Cross-Reference with CFR
Provision Plan Section Page
112.3(d) Professional Engineer Certification 4
112.3(e) Location of SPCC Plan 5
112.5 Plan Review 5
112.7 Management Approval 3
112.7 Cross-Reference with SPCC Rule 8
112.7(a)(3) Site Plan and Facility Diagram 12 and Appendix
A
112.7(a)(4) Spill/Discharge Notification 41
112.7(a)(5) Part 5: Discharge Response 35
112.7(b) 3.4 Potential Discharge Volumes and
Direction of Flow
12
112.7(c) 3.5 Containment and Diversionary
Structures
14
112.7(d) 3.6 Practicability of Secondary
Containment
14
112.7(e) 3.7 Inspections, Tests, and Records 14
112.7(f) 3.8 Personnel, Training and Discharge
Prevention Procedures
21
112.7(g) 3.9 Security 23
112.7(h) 3.10 Tank Truck Loading/Unloading 23
112.7(i) 3.11 Brittle Fracture Evaluation 25
112.7(j) 3.12 Conformance with Applicable State
and Local Requirements
25
112.8(b) 4.1 Facility Drainage 26
112.8(c)(1) 4.2.1 Construction 28
112.8(c)(2) 4.2.2 Secondary Containment 28
112.8(c)(3) 4.2.3 Drainage of Diked Areas 28
112.8(c)(4) 4.2.4 Corrosion Protection 28
112.8(c)(6) 4.2.6 Inspection - Facility Inspection
Checklists
28
112.8(c)(8) 4.2.8 Overfill Prevention System 32
112.8(c)(10) 4.2.10 Visible Discharges 32
112.8(c)(11) 4.2.11 Mobile and Portable Containers 32
112.8(d) 4.3 Transfer Operations, Pumping and In-
Plant Processes
32
112.20(e) Certification of Substantial Harm
Determination
42
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PART 2: GENERAL FACILITY INFORMATION
Name: Western Slope Materials – North Hangs Mine
Address: 6533 346 County Rd
Silt, CO 81652
Type: Concrete Batch Plant Facility
Date of Initial Operations: Not yet in operation
Owner/Operator: Western Slope Materials, LLC
PO Box 1319
Carbondale, CO 81623
Primary contact: Sean Mello
Work: 970 963-2296
Cell (24 hours): 970 379-0427
2.1 Facility Description (40 CFR 112.7(a)(3))
2.1.1 Location and Activities
The North Hangs Mine is located approximately one mile southwest of Silt, CO in Garfield County. The
mine will contain a permanent concrete batch plant to process the aggregate material being mined on
site. The concrete that is produced will be shipped offsite for use in construction. Concrete truck
washing and waste concrete storage will also take place onsite. Oil storage consists of diesel fuel for
the plant and onsite off-highway equipment. Small quantities of oil and grease is also stores onsite for
equipment maintenance.
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2.1.2 Oil and Fuel Storage
The capacities of oil containers present at the site are listed below and are also indicated on the facility
diagram in the facility layout. All containers with a capacity of 55 gallons or more are included.
Table 2-1: Oil Containers
ID Content Size Location Secondary Containment
DB1 Diesel 10,000
Northeast side
of processing
area Double walled
DB2 Diesel 5,000
Northeast side
of processing
area Double walled
DB3 Diesel 2,000
Northeast side
of processing
area Double walled
Other Containers:
1. Various other tanks associated with mobile equipment used for the sole purpose of motive
power. These tanks are not regulated under the SPCC rule. See 40 CFR 112.1(d)(2)(ii)(B)
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2.2 Evaluation of Discharge Potential
2.2.1 Distance to Navigable Waters and Adjoining Shorelines and Flow Paths
The nearest navigable water is the Colorado River, which is directly to the north of the site. Stormwater
discharges are made to transport to the Colorado River via existing drainage swale s on undisturbed
areas of the site or the Bernudy ditch.
2.2.2 Discharge History
Table 2-1 summarizes the facility’s discharge history.
Table 2-2: Oil Discharge History
Description of Discharge Corrective Actions Taken
Plan for Preventing
Recurrence
No Discharges
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PART 3: DISCHARGE PREVENTION - GENERAL
SPCC PROVISIONS
The following measures are implemented to prevent oil discharges during the handling, use, or
transfer of oil products at the facility. Oil-handling employees have received training in the proper
implementation of these measures.
3.1 Compliance with Applicable Requirements (40 CFR 112.7(a)(2))
Diesel tank (DB1) has double walls have leak detection equipment. All other chemical tanks are stored
within a building where leaks can be inspected for visually at any time.
3.2 Facility Layout Diagram (40 CFR 112.7(a)(3))
The Facility Layout presents a layout of the facility and the location of storage tanks and drums. As
required under 40 CFR 112.7(a)(3), the facility diagram indicates the location and content of AST.
3.3 Spill Reporting (40 CFR 112.7(a)(4))
The discharge notification form will be completed upon detection of a discharge by the Environmental
Manager and prior to reporting a spill to the proper notification contacts.
3.4 Potential Discharge Volumes and Direction of Flow (40 CFR
112.7(b))
Table 3-1 presents expected volume, discharge rate, general direction of flow in the event of equipment
failure and means of secondary containment for different parts of the facility where oil is stored, used,
or handled. The Facility Layout shows the tank locations in plan view.
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Table 3-1: Potential Discharge Volumes and Direction of Flow
Potential Event
Maximum
volume
released
(gallons)
Maximum
discharge
rate
Direction of
Flow Secondary Containment
Failure of aboveground
tank (collapse or
puncture below product
level)
10,000 Gradual to
instantaneous
Southwest Tank double wall
Tank overfill 1 to 120 60 gal/min Varies Concrete berm around
DB1
Pipe failure 100 50 gal/min Varies Land-based spill response
capability (spill kit)
Leaking pipe or valve
packing
100 1 gal/min Varies Land-based spill response
capability (spill kit)
Diesel dispenser hose/
connections leak
1 to 150 30 gal/minute Varies Land-based spill response
capability (spill kit)
Leak or failure of drum 1 to 55 Gradual to
instantaneous
Varies Storage building walls
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3.5 Containment and Diversionary Structures (40 CFR 112.7(c))
Methods of secondary containment at this facility include a combination of structures (e.g., concrete
berm, building walls) and land-based spill response (e.g., sorbents) to prevent oil from reaching the
nearest drainage. The capacities of the containment are shown in Table 2-1.
• For bulk storage containers (refer to Section 4.2.2 of this Plan):
o Diesel tank DB1
• In transfer areas and other parts of the facility where a discharge could occur:
o Drip pans. Fill ports for all ASTs are equipped with drip pans to contain small leaks from
the piping/hose connections.
o Sorbent material. a Spill cleanup kit of at least 90 gallons or more that include
absorbent material, booms, and other portable barriers is located in the Storage Building
as shown on the Facility Layout. The spill kit is located within close proximity of the
chemical storage and handling areas for rapid deployment should a spill occur.
3.6 Practicability of Secondary Containment (40 CFR 112.7(d))
Western Slope Materials management has determined that secondary containment is practicable at this
facility.
3.7 Inspections, Tests, and Records (40 CFR 112.7(e))
As required by the SPCC rules, Western Slope Materials performs the inspections, tests, and
evaluations listed in the following Table 3-2. The table summarizes the various types of inspections and
tests performed at the facility. The inspections and tests are described later in this section, and in the
respective sections that describe different parts of the facility (e.g., Section 4.2.6 for bulk storage
containers).
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Table 3-2: Inspection and Testing Program
Facility Component Action Frequency/Circumstances
Aboveground
container with all
sides visible
Test container integrity by conducting visual
inspection. Inspect outside of container for
signs of deterioration and discharges.
Following a regular schedule (monthly, annual,
and during scheduled inspections) and
whenever material repairs are made.
Container supports
and foundation
Inspect container’s supports and
foundations.
Following a regular schedule (monthly, annual,
and during scheduled inspections) and
whenever material repairs are made.
Liquid level sensing
devices (overfill)
Test for proper operation. Monthly
Diked area, lined
berms and site berms
Inspect for signs of deterioration, discharges,
or accumulation of oil inside diked areas.
Visually inspect content for presence of oil.
Monthly
Prior to draining
All aboveground
valves, piping, and
appurtenances
Assess general condition of items, such as
flange joints, expansion joints, valve glands
and bodies, catch pans, pipeline supports,
locking of valves, and metal surfaces.
Monthly
Buried piping Inspect for deterioration.
Integrity and leak testing.
Whenever a section of buried line is exposed
for any reason.
At the time of installation, modification,
construction, relocation, or replacement.
Note: If any above ground container is added to the site at a later date, where all sides are not visible,
alternative testing requirements will be needed and the plan will need to be modified.
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3.7.1 Daily Inspection
A Western Slope Materials employee performs a complete walk-through of the facility each day during
normal operation. This daily visual inspection involves: looking for tank/piping damage or leakage,
stained or discolored soils, or excessive accumulation of water in the containment. All types of
secondary containment should be visually checked for damage.
3.7.2 Monthly Inspection
The checklist provided is used for monthly inspections by Western Slope Materials personnel. The
monthly inspections cover the following key elements:
• Observing the exterior of aboveground storage tanks, pipes, and other equipment for signs of
deterioration, leaks, corrosion, and thinning.
• Observing the exterior of portable containers for signs of deterioration or leaks.
• Observing tank foundations and supports for signs of instability or excessive settlement.
• Observing the tank fill and discharge pipes for signs of poor connection that could cause a
discharge, and tank vent for obstructions and proper operation.
• Verifying the proper functioning of overfill prevention systems.
• Checking the inventory of discharge response equipment and restocking as needed.
• Check all types of secondary containment on site for damage.
All problems regarding tanks, piping, containment, or response equipment must immediately be
reported to the Facility Manager. Visible oil leaks from tank walls, piping, or other components must be
repaired as soon as possible to prevent a larger spill or a discharge to navigable waters or adjoining
shorelines. Pooled oil is removed immediately upon discovery. The Monthly Inspection Checklist is
included in this section and the inspection will be conducted during normal operation of the site.
Written monthly inspection records are signed by the Facility Manager and maintained with this SPCC
Plan for a period of five years.
Monthly Inspection Checklist
This inspection record must be completed each month except the month in which an annual inspection
is performed or during normal site closure. Provide further description and comments, if necessary, on
a separate sheet of paper and attach to this sheet. *Any item that receives “yes” as an answer must be
described and addressed immediately.
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Monthly Inspection Checklist
Y* N Description & Comments
Storage tanks
Tank surfaces show signs of leakage
Tanks are damaged, rusted or deteriorated
Tank supports are deteriorated or buckled
Tank foundations have eroded or settled
Level gauges or alarms are inoperative
Vents are obstructed
Precipitation present in secondary containment
Secondary containment is damaged or stained
Site berms are Damaged
Piping
Valve seals, gaskets, or other appurtenances are leaking
Pipelines or supports are damaged or deteriorated
Joints, valves and other appurtenances are leaking
Buried piping is exposed
Loading/unloading and transfer equipment
Connections are not capped or blank-flanged
Security
Fencing, gates, or lighting is non-functional
Pumps and valves are locked if not in use
Response Equipment
Response equipment inventory is complete
Date: ____________ Signature: _________________________
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3.7.3 Annual Inspection
Facility personnel perform a more thorough inspection of facility equipment on an annual basis. This
annual inspection complements the monthly inspection described above and is performed in March of
each year using the checklist provided. The Annual Inspection Checklist is included in this section.
The annual inspection is preferably performed after a large storm event in order to verify the
imperviousness and/or proper functioning of drainage control systems such as the site berms, concrete
lined dikes, lined berms and control valves.
Written annual inspection records are signed by the Facility Manager and maintained with this SPCC
Plan for a period of five years.
Annual Inspection Checklist
This inspection record must be completed each year. Provide further description and comments, if
necessary, on a separate sheet of paper and attach to this sheet. *Any item that receives “yes” as an
answer must be described and addressed immediately.
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Annual Inspection Checklist
Y* N Description & Comments
Storage tanks
Tank surfaces show signs of leakage
Tanks are damaged, rusted or deteriorated
Tank supports are deteriorated or buckled
Tank foundations have eroded or settled
Level gauges or alarms are inoperative
Vents are obstructed
Precipitation present in secondary containment
Secondary containment is damaged or stained
Piping
Valve seals, gaskets, or other appurtenances are leaking
Pipelines or supports are damaged or deteriorated
Joints, valves and other appurtenances are leaking
Buried piping is exposed
Loading/unloading and transfer equipment
Connections are not capped or blank-flanged
Secondary Containment
Site berm is not preventing dischage
Concrete Bunker is damaged or stained
Security
Fencing, gates, or lighting is non-functional
Pumps and valves are locked if not in use
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Y* N Description & Comments
Response Equipment
Response equipment inventory is complete
Date: ____________ Yr: _________ Signature: _________________________
Annual reminders:
* Hold SPCC Briefing for all oil-handling personnel (and update briefing log in the Plan);
* Check contact information for key employees and response/cleanup contractors and update them
in the Plan as needed;
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3.7.4 Periodic Integrity Testing
In addition to the above monthly and annual inspections by facility personnel, Tank integrity is verified
with the leak detection system.
3.8 Personnel, Training, and Discharge Prevention Procedures
(40 CFR 112.7(f))
The Facility Manager is the facility designee and is responsible for oil discharge prevention, control, and
response preparedness activities at this facility.
Western Slope Materials management has instructed oil-handling facility personnel in the operation and
maintenance of oil pollution prevention equipment, discharge procedure protocols, applicable pollution
control laws, rules and regulations, general facility operations, and the content of this SPCC Plan. Any
new facility personnel with oil-handling responsibilities are provided with this same training prior to
being involved in any oil operation.
Annual discharge prevention briefings are held by the Facility Manager for all facility personnel involved
in oil operations. The briefings are aimed at ensuring continued understanding and adherence to the
discharge prevention procedures presented in the SPCC Plan. The briefings also highlight and describe
known discharge events or failures, malfunctioning components, and recently implemented
precautionary measures and best practices. Facility operators and other personnel will have the
opportunity during the briefings to share recommendations concerning health, safety, and
environmental issues encountered during facility operations.
Records of the briefings and discharge prevention training are kept on the Training Form and
maintained with this SPCC Plan for a period of five years.
Record of Annual Discharge Prevention Training Form
Briefings will be scheduled and conducted by the facility owner or operator for operating personnel at
regular intervals to ensure adequate understanding of this SPCC Plan. The briefings will also highlight
and describe known discharge events or failures, malfunctioning components, and recently
implemented precautionary measures and best practices. Personnel will also be instructed in operation
and maintenance of equipment to prevent the discharge of oil, and in applicable pollution laws, rules,
and regulations. Facility operators and other personnel will have an opportunity during the briefings to
share recommendations concerning health, safety, and environmental issues encountered during
facility operations.
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Briefings and Training
Date Subjects Covered Employees in Attendance Instructor(s)
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3.9 Security (40 CFR 112.7(g))
Since this is a portable plant, the site security cannot be outlined, however, Western Slope Materials
takes steps at each site to ensure they are safe and secure.
3.10 Tank Truck Loading/Unloading Rack Requirements (40 CFR
112.7(h))
The potential for discharges during tank truck loading and unloading operations is addressed at each
facility using site berms. Western Slope Materials management is committed to ensuring the safe
transfer of material to and from storage tanks. The following measures are implemented to prevent oil
discharges during tank truck loading and unloading operations.
3.10.1 Secondary Containment (40 CFR 112.7(h)(1))
All drums and tanks have secondary containment. The containment consists of structures directly
around the tanks and the site berm which is the end of the flow path. The plant has sufficient capacity
to collect all tank capacity plus precipitation. All loading areas have drip pans to be used during the
disconnection of transfer hoses.
3.10.2 Loading/Unloading Procedures (40 CFR 112.7(h)(2) and (3))
All suppliers must meet the minimum requirements and regulations for tank truck loading/unloading
established by the U.S. Department of Transportation. Western Slope Materials ensures that the
vendor understands the site layout, knows the protocol for entering the facility and unloading product,
and has the necessary equipment to respond to a discharge from the vehicle or fuel delivery hose.
The Facility Manager or his/her designee supervises oil deliveries for all new suppliers, and periodically
observes deliveries for existing, approved suppliers.
Vehicle filling operations are performed by facility personnel trained in proper discharge prevention
procedures. The truck driver or facility personnel remain with the vehicle at all times while fuel is being
transferred. Transfer operations are performed according to the minimum procedures outlined in Table
3-3. This table is also posted next to the loading/unloading point.
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Table 3-3: Fuel Transfer Procedures
Stage Tasks
Prior to loading/
unloading
Visually check all hoses for leaks and wet spots.
Verify that sufficient volume (ullage) is available in the storage tank or truck.
Secure the tank vehicle with wheel chocks and interlocks.
Ensure that the vehicle’s parking brakes are set.
Verify proper alignment of valves and proper functioning of the pumping system.
During loading/
unloading
Driver must stay with the vehicle at all times during loading/unloading activities.
Periodically inspect all systems, hoses and connections.
When loading, keep internal and external valves on the receiving tank open along
with the pressure relief valves.
When making a connection, shut off the vehicle engine. When transferring Class 3
materials, shut off the vehicle engine unless it is used to operate a pump.
Monitor the liquid level in the receiving tank to prevent overflow.
Monitor flow meters to determine rate of flow.
When topping off the tank, reduce flow rate to prevent overflow.
After loading/
unloading
Make sure the transfer operation is completed.
Close all tank and loading valves before disconnecting.
Securely close all vehicle internal, external, and dome cover valves before
disconnecting.
Make sure the hoses are drained to remove the remaining oil before moving them
away from the connection. Use a drip pan.
Cap the end of the hose and other connecting devices before moving them to
prevent uncontrolled leakage.
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3.11 Brittle Fracture Evaluation (40 CFR 112.7(i))
There are no field constructed tanks on site.
3.12 Conformance with State and Local Applicable Requirements
(40 CFR 112.7(j))
All bulk storage tanks at this facility are registered with the state and local authorities if required and
have current certificates of registration and special use permits required by the local fire code. All above
ground tanks are strictly for the concrete processing operation. No off-site trucks are loaded from these
tanks. For this reason, the above ground tanks do not fall under the rules of the Colorado Division of Oil
and Public Safety.
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PART 4: DISCHARGE PREVENTION – SPCC
Provisions for Onshore Facilities (Excluding Production
Facilities)
4.1 Facility Drainage (40 CFR 112.8(b))
All secondary containment structures do not drain offsite. The facility drainage paths are outlined on the
Facility Plan.
Record of Containment Stormwater Pumping
This record must be completed when rainwater from containment areas is pumped out of the
containment. Discharge of water which is free of an oil sheen, can be to the pit floor. Any
contaminated stormwater needs to be disposed of in a safe way such as blending into the hot
plant feed material.
Date Diked Area Oil Sheen Time
Signature
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4.2 Bulk Storage Containers (40 CFR 112.8(c))
Table 4-1 summarizes the construction, volume, and content of bulk storage containers at the site.
Table 4-1: List of Bulk Containers
Tank Location Type (Construction
Standard)
Capacity
(gallons)
Content Discharge
Prevention &
Containment
DB1 Northeast
side of
processing
area
Steel tank (above
ground)
10,000 Off-highway
diesel
Double-walled;
Concrete berm
DB2 Northeast
side of
processing
area
Steel tank (above
ground)
5,000 Off-highway
diesel
Double-walled;
Concrete berm
DB3 Northeast
side of
processing
area
Steel tank (above
ground)
2,000 Off-highway
diesel
Double-walled;
Concrete berm
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4.2.1 Construction (40 CFR 112.8 (c)(1))
All oil tanks used at this facility are constructed of steel, in accordance with industry specifications as
described above. The design and construction of all bulk storage containers are compatible with the
characteristics of the oil product they contain, and with temperature and pressure conditions.
4.2.2 Secondary Containment (40 CFR 112.8(c)(2))
The full complement of tanks and their respective secondary containment is shown in Table 2-1.
Precipitation is not a concern for double walled tanks, or the berms and bins as they are well above the
110% volume requirement. Containers stored within a structure are protected from the elements.
These containments must be maintained in good condition and evaluated monthly, as shown on
the monthly inspection sheet.
4.2.3 Drainage of Diked Areas (40 CFR 112.8(c)(3))
No uncontaminated stormwater can discharge from the site without first passing through control
structures. At these control structures, all stormwater is inspected and recorded prior to discharge.
4.2.4 Corrosion Protection (40 CFR 112.8(c)(4))
There are no underground storage tanks on site and all above ground tanks are elevated therefore, no
cathodic protection is required on all above ground tanks.
4.2.5 Partially Buried and Bunkered Storage Tanks (40 CFR 112.8(c)(5))
This section is not applicable since there are no partially buried or bunkered storage tanks at this
facility.
4.2.6 Inspections and Tests (40 CFR 112.8(c)(6))
Visual inspections of ASTs by facility personnel are performed according to the procedure described in
this SPCC Plan. Leaks from tank seams, gaskets, rivets, and bolts are promptly corrected. Records of
inspections and tests are signed by the inspector and kept at the facility for at least three years.
The scope and schedule of certified inspections and tests performed on the facility’s ASTs are specified
in STI Standard SP-001. The external inspection includes ultrasonic testing of the shell, as specified in
the standard, or if recommended by the certified tank inspector to assess the integrity of the tank for
continued oil storage.
Records of certified tank inspections are kept at the facility for at least five years. Shell test comparison
records are retained for the life of the tanks.
Table 4-2 summarizes inspections and tests performed on bulk storage containers (“EE” indicates
that an environmentally equivalent measure is implemented in place of the inspection/test, as
discussed in Section 3.1 of this Plan).
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The recommendations for integrity testing are based on a) the knowledge of the tank history, b) the
fact that all tanks are shop constructed, c) past tank performance, d) the visible condition of the
tanks, and e) the quality and volume of secondary containment.
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Table 4-2: Scope and Frequency of Bulk Storage Containers Inspections and Tests
Tank ID
Inspection/Test DB1 DB2 DB3
Visual inspection by facility
personnel (as per checklist of
Section 3.7)
M M M
External inspection by inspector
(as per STI Standard SP-001)
A A A
Internal inspection by certified
inspector (as per STI Standard
SP-001)
EE EE EE
Tank tightness test meeting
requirements of 40 CFR 280
EE EE EE
Legend: M: Monthly
A: Annual
EE: Inspection not required until 2026, given use of environmentally equivalent measure (refer to
Section 3.1 of this Plan and Table 4-3).
* Or earlier, as recommended by the certified inspector based on findings from an external
inspection.
† Internal inspection may be recommended by the certified inspector based on findings from the
external inspection.
Rationale for the initial external shell testing of tanks is demonstrated in Table 4-3 below. Initial
ultrasonic shell testing will be performed by a qualified person according to the protocol included in
Appendix B. The report of the testing will be attached to this plan and will be available on site. Based on
the results of this testing, the tanks will either be placed out of service or a new test period will be
established.
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Table 4-3 Rationale for Determination of Tank Shell testing per SP-001
Tank ID DB1 DB2 DB3
Tank Size
(gallons) 10,000 5,000 2,000
Liquid Diesel Diesel Diesel
Shop
Constructed Yes Yes Yes
Year Placed in
Service 2021 2021 2021
Years used in
plant 0 0 0
Past leaks or
other
problems No No No
All Sides
Visible Yes Yes Yes
Bottom
Visible Yes Yes Yes
Visible
Condition Excellent Excellent Excellent
Type of
Secondary
Containment
Double
walled
Double
Walled
Double
Walled
Secondary
Containment
Volume 11,000 5,500 2,200
Containment
% of Tank Size 110 110 110
Leak
Detection Yes Yes Yes
Visual
Inspection
Frequency M M M
Required
Shell Test
Inspection
date
By Spring
2026
By Spring
2026
By Spring
2026
Note: DB1, DB2, and DB3 will be installed in 2022 as a brand-new tank. Ultrasonic shell testing must
be conducted once every five years.
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4.2.7 Heating Coils (40 CFR 112.8(c)(7))
No heating coils exist on any tank at this site.
4.2.8 Overfill Prevention Systems (40 CFR 112.8(c)(8))
General secondary containment is provided in the event of overfills, as described in this Plan.
Storage drums are not refilled, and therefore overfill prevention systems do not apply.
4.2.9 Effluent Treatment Facilities (40 CFR 112.8(c)(9))
Stormwater detention ponds are located onsite to trap effluent. These are inspected monthly and
discharges from them are documented as part of the site’s Stormwater Management Plan (SWMP).
4.2.10 Visible Discharges (40 CFR 112.8(c)(10))
Visible discharges from any container or appurtenance – including seams, gaskets, piping, pumps,
valves, rivets, and bolts – are quickly corrected upon discovery.
4.2.11 Mobile and Portable Containers (40 CFR 112.8(c)(11))
All small and portable containers are kept in the Storage Building
4.3 Transfer Operations, Pumping, and In-Plant Processes
(40 CFR 112.8(d))
Transfer operations at this facility include:
• The filling of mobile equipment.
All buried piping at this facility is cathodically protected against corrosion and is provided with a
protective wrapping and coating. When a section of buried line is exposed, it is carefully examined for
deterioration. If corrosion damage is found, additional examination and corrective action must be taken
as deemed appropriate considering the magnitude of the damage. Additionally, Western Slope
Materials conducts integrity and leak testing of buried piping at the time of installation, modification,
construction, relocation, or replacement. Records of all tests are kept at the facility for at least three
years.
Lines that are not in service or are on standby for an extended period of time are capped or blank-
flanged and marked as to their origin.
All pipe supports are designed to minimize abrasion and corrosion and to allow for expansion and
contraction. Pipe supports are visually inspected during the monthly inspection of the facility.
All aboveground piping and valves are examined monthly to assess their condition. Inspection includes
aboveground valves, piping, appurtenances, expansion joints, valve glands and bodies, catch pans,
pipeline supports, locking of valves, and metal surfaces. Observations are noted on the monthly
inspection checklist provided in this Plan.
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Warning signs are posted at appropriate locations throughout the facility to prevent vehicles from
damaging aboveground piping and appurtenances. Most of the aboveground piping is located within
areas that are not accessible to vehicular traffic (e.g., inside diked area). Brightly painted bollards are
placed where needed to prevent vehicular collisions with equipment.
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PART 5: DISCHARGE RESPONSE
This section describes the response and cleanup procedures in the event of an oil discharge. The
uncontrolled discharge of oil to groundwater, surface water is prohibited by state and federal laws.
Immediate action must be taken to control, contain, and recover discharged product.
This section describes the cleanup response and protocols to follow in the event of an oil or diesel
spill. The uncontrolled discharge of oil or diesel to groundwater, surface water or soil is prohibited by
State or Federal laws. It is imperative that action be taken to respond to a spill once it has
occurred. In the event of an oil spill, depending on the volume and characteristics of the material
released, the operator has defined spill response as either a “Minor Spill Response” or “Major
Spill Response” (“Spill Emergency”). A list of Emergency Contacts is included.
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5.1 Minor Spill Response
A spill is
encountered.
Locate the source of
the spill. Can the
source be stopped
safely?
Prevent further material from
being spilled. Can the on site
employees contain the spilled
material safely?
Once the spill is
contained, notify
the Facility
Manager.
The Facility Manager will
document the spill. Take
pictures of the spill and how it
was contained.
Did the spill reach
groundwater or
surface water?
Was the spill
greater than 25
gallons?
The Environmental
Manager will fill out the
Spill Notification Form.
The Environmental Manager or
upper management of Western
Slope Materials will notify the
required governmental
agencies listed on the Spill
Notification Form (Not
Including the EPA).
The Environmental Manager
or upper management of
Western Slope Materials will
notify the required
governmental agencies listed
on the Spill Notification Form
(Including the EPA).
Facility Manager will
evaluate safety hazard of
spill and Call 911 if there is
risk of fire or explosion and
evacuate the area.
Yes
No
Yes
The Facility Manager
will notify the
Environmental
Manager.
Yes
No
The Environmental
Manager will document
the spill.
No
Yes
The Environmental
Manager will fill out the
Spill Notification Form.
The Environmental
Manager will document
the spill.
No
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5.2 Response to a Major Discharge
Due to the secondary containment of the oil and fuel tanks on site, and the 3rd level of
containment, which is the site berm, the possibility of a major discharge to any River is
very unlikely. However, the possibility is addressed below.
A “major” discharge is defined as one that cannot be safely controlled or cleaned up by
facility personnel, such as when:
• The discharge is large enough to spread beyond the immediate discharge area;
• The discharged material enters water;
• The discharge requires special equipment or training to clean up;
• The discharged material poses a hazard to human health or safety; or
• There is a danger of fire or explosion.
In the event of a major discharge from the site, the following guidelines apply:
• If there is a chance of an ignition or any other condition that would put the site
personnel at risk, all workers must immediately evacuate the discharge site via the
designated access road.
• If the Facility Manager is not present at the facility, the senior on-site person
notifies the Facility Manager of the discharge and has authority to initiate
notification and response. Certain notifications are dependent on the circumstances
and type of discharge. For example, if oil reaches a sanitary sewer, the publicly
owned treatment works (POTW) should be notified immediately. A discharge that
threatens the Eagle River may require immediate notification to downstream users.
The Facility Manager (or senior on-site person) must call for medical assistance if
workers are injured.
• The Facility Manager (or senior on-site person) must notify the Fire Department or
Police Department.
• The Facility Manager (or senior on-site person) must call the spill response and
cleanup contractors listed in the Emergency Contacts list in this section.
• The Facility Manager (or senior on-site person) must immediately contact the
CDPHE Colorado Office of Emergency Management: 303-273-1778 and the
National Response Center (888-424-8802).
• The Facility Manager (or senior on-site person) must record the call on the
Discharge Notification form in this section and attach a copy to this SPCC Plan.
• The Facility Manager (or senior on-site person) coordinates cleanup and obtains
assistance from a cleanup contractor or other response organization as necessary.
If the Facility Manager is not available at the time of the discharge, then the next highest
person in seniority assumes responsibility for coordinating response activities.
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5.3 Waste Disposal
Wastes resulting from a minor spill response will be containerized in impervious
bags, drums or buckets. The waste will be removed from the site by a licensed
waste hauler within two weeks. Wastes resulting from a major spill response will be
removed and disposed of by a cleanup contractor. Waste that is safe to mix with
asphalt plant feed material can be conducted as well.
5.4 Spill Notification Forms and Discharge Notification
If a minor spill exists and the can be contained by site personnel, after the appropriate
phone calls are made and the spill is contained, a Spill Notification Form shall be
completed and submitted to the Facility Manager. This form is included in the following
pages. The Spill Notification Form includes a checklist to document the proper
notification of state and federal agencies. The form shall be filed and maintained for 3
years.
Any size discharge occurs, (i.e., one that creates a sheen, emulsion, or sludge) that affects
or threatens to affect navigable waters or adjoining shorelines must be reported
immediately to the National Response Center (1-800-424-8802). The Center is staffed 24
hours a day.
A summary sheet is included in this section to facilitate reporting. The person reporting
the discharge must provide the following information:
• Name, location, organization, and telephone number
• Name and address of the party responsible for the incident
• Date and time of the incident
• Location of the incident
• Source and cause of the release or discharge
• Types of material(s) released or discharged
• Quantity of materials released or discharged
• Danger or threat posed by the release or discharge
• Number and types of injuries (if any)
• Media affected or threatened by the discharge (i.e., water, land, air)
• Weather conditions at the incident location
• Any other information that may help emergency personnel respond to the incident
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5.5 Cleanup Contractors and Equipment Suppliers
Contact information for specialized spill response and cleanup contractors are provided
in this section. These contractors have the necessary equipment to respond to a
discharge of oil that affects the River, including floating booms and oil skimmers.
The 90+ Gallon Spill kit is located in the Storage Building as shown on the Facility
Layout. The inventory of response supplies and equipment is typical of a large spill cut,
which includes booms, pillow, socks, pads, overpack container with screw lid, bags,
gloves and instructions. The inventory is verified on a monthly basis. Additional supplies
and equipment may be ordered from the following sources:
Spill 911 (800) 474 5911
Creative Safety Supply (866) 754-0160
Contractors for Significant Spills and/or Significant Discharges
Custom Environmental Services, Inc.
Arvada, CO 80002
Tel+1 (303) 423-9949
Tel+1 (800) 310-7445
Fax+1 (303) 423-1854
Environmental contractor incl. oil spill, HAZMAT
and asbestos.
Custom Environmental Services, Inc.
Colorado Springs, CO 80907
Tel+1 (719) 598-1557
Tel+1 (800) 310-7445
Fax+1 (719) 598-2687
Environmental Restoration LLC
Commerce City, CO 80022
Tel +1 (303) 382-1258
Tel +1 (888) 814-7477
Fax +1 (303) 382-1285
Veolia ES Special Services
Henderson, CO 80640
Tel +1 (303) 371-7600
Tel +1 (800) 688-4005
Fax +1 (303) 371-7678
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Emergency Contacts
Spill Reporting Telephone #
EPA (800) 424-8802
Colorado Dept. of Health and Environment (877) 518-5608
Colorado DRMS (303) 866-3567
Local Health Department (970) 629-5102
MSHA (303) 231-5465
Local Emergency Agencies Telephone #
Fire Department 911
Sheriff/Police 911
Spill Response Contractors Telephone #
Lewicki and Associates (303) 346-5196
Adequate Heavy Equipment Kept Onsite for Rapid Spill Response
Owner/Operator Telephone #
Western Slope Materials (970) 524-2520
Sean Mello (970) 379-0427
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Spill Notification/Documentation Form
Part A: Basic Spill Data
Spill Type: Major / Minor [ ] Major [ ] Minor Spill Date:
Type of Spilled Substance: Spill Time:
Quantity Spilled: Spill Duration:
Facility Name: Location of Spill:
Owner / Company Name: Release to : [ ] Containment [ ] River [ ] Pond [ ]
Soil [ ] Air [ ] Ground water [ ] Other
Nature of spill and any environmental or health effects: [ ] Injuries [ ] Fatality
*Complete Part B if the spill is geater than 25 gallons
Part B: Notification Checklist
Spill of greater than 25 gallons of
petroleum product:
Notification Date and Time Name of Person
the Received
Call
Colorado Department of Public Health and Environment
(877) 518-5608
Local Health Department
Unknown Location
Colorado Division of Reclamation, Mining and Safety (303) 866-3567
MSHA (303) 231-5465
Spill reaches ground water or surface water:
EPA National Response Center (800) 424-8802
Form Completed By (Print Name): Sign and Date:
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The spill notification form must be submitted to the Facility Manager. A copy must be
retained on -site and included with the SPCC Plan.
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Substantial Harm Determination
Facility Name: Western Slope Materials – North Hangs Mine
Facility Address: 6533 346 County Rd
Silt, CO 81652
1. Does the facility transfer oil over water to or from vessels and does the facility have a
total oil storage capacity greater than or equal to 42,000 gallons?
Yes No
2. Does the facility have a total oil storage capacity greater than or equal to 1 million
gallons and does the facility lack secondary containment that is sufficiently large to
contain the capacity of the largest aboveground oil storage tank plus sufficient freeboard
to allow for precipitation within any aboveground storage tank area?
Yes No
3. Does the facility have a total oil storage capacity greater than or equal to 1 million
gallons and is the facility located at a distance (as calculated using the appropriate
formula in 40 CFR part 112 Appendix C, Attachment C-III or a comparable formula) such
that a discharge from the facility could cause injury to fish and wildlife and sensitive
environments?
Yes No
4. Does the facility have a total oil storage capacity greater than or equal to 1 million
gallons and is the facility located at a distance (as calculated using the appropriate
formula in 40 CFR part 112 Appendix C, Attachment C-III or a comparable formula) such
that a discharge from the facility would shut down a public drinking water intake?
Yes No
5. Does the facility have a total oil storage capacity greater than or equal to 1 million
gallons and has the facility experienced a reportable oil spill in an amount greater than or
equal to 10,000 gallons within the last 5 years?
Yes No
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Certification
I certify under penalty of law that I have personally examined and am familiar with the
information submitted in this document, and that based on my inquiry of those
individuals responsible for obtaining this information, I believe that the submitted
information is true, accurate, and complete.
Signature: Title: EHS Manager
Name:________________________ Date:
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November 2021
APPENDIX A – FIGURES
Map C-2 Phase 1 Mining Plan
Map C-3 Phase 2 Mining Plan
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APPENDIX B – ULTRASONIC SHELL TEST
PROTOCOL
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Western Slope Materials
Tank Thickness Testing Protocol
In addition to physical inspections conducted at intervals specified in Spill Prevention
Countermeasure and Control Plans, external ultrasonic thickness (UT) measurements of
the above ground storage tank (AST) shells shall be performed. External UT
measurements of the tank shell are a form of non-destructive testing used to locate
potential flaws or areas of localized corrosive attack and establish a general rate of shell
corrosion on the interior surface of the tank shell.
To insure that primary containment is satisfactory to contain petroleum products,
integrity testing shall be conducted on each vessel designated for testing in the SPCC
Plan. The following protocol shall be followed in determining the wall thickness of those
individual tanks specified for testing:
Field UT measurements are taken with a Hitachi HT300 Ultrasonic Digital
ThicknessMeter. The Ultrasonic Meter shall be set per manufacturer recommendations
for the type of metal being tested. Field calibrations shall be performed prior to and
during testing using the Zero Adjustment test piece attached to the meter at increments
not to exceed 1 hour.
It is expected that the surface of the tanks will have a painted surface to prevent
corrosion. The gage shall be adjusted to account for the painted surface. If the gage
does not have an adjustment for paint, the gage shall be calibrated by measuring the
known thickness of plate steel with and without paint coating. The gage shall be
adjusted, if possible to account for the painted surface. If no adjustment can be made to
the meter, adjustment to the reading shall be noted on the field test form.
UT measurements shall be concentrated in areas of the shell where corrosion is most
likely to be present. The areas of the shell for UT testing are divided into grid lines at
approximate arc lengths of 2 feet apart, starting at the bottom of the tank. Where
possible, measurements shall be along the longitudinal “A” grid or bottom of the tank.
Additional measurements shall be taken along the “B” and “C-C” longitudinal grid line,
which are 2 feet from the longitudinal “A” grid and on both sides of the “A” grid. In cases
where the “A” grid is not accessible, measurements shall be taken as close to the “A”
grid as possible on both sides of the “A” grid. Additional measurements shall be taken on
the longitudinal grid line 2-feet away from the first grid line. By example only, grid “C” is
the closest a measurement is taken to the preferred grid “A”. The next measurement
shall be taken along grid “E”. See attached sketch of the grid lines. The number of
measurements taken along any longitudinal grid line is in part determined by the total
length of the tank and the number of suspected areas which exhibit signs of corrosion.
Normally, these measurements are no greater than 3 feet apart. In addition to
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measurements taken along the longitudinal axis of the tank shell, two measurements
shall be taken on both end plates of the tanks and the top of the tank.
Once test grid points are determined, the tester shall take four measurements within two
inches of the specified grid point and record on the field test form. An average of these
four measurements shall also be calculated and recorded on the field test form. The
tester must be qualified and experienced in the use of the Hitachi HT300 Ultrasonic
Digital Thickness Meter. If the tester encounters areas of thin wall thickness, additional
readings may be taken to better identify the thin area. The test results will be passed on
to the P.E. and the tester will work with the P.E. to determine if the tank should be
removed from service, should be repaired, or can continue in service with a designated
shell test interval. The SPCC Plan will be then modified accordingly.
For double walled tanks, all liquid will need to be removed from the tank and the testing
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Tank Shell Test Grid Lines
"L" grid is slightly more than 2' arc
due to this tank size
required
Tank of ' Radius
Other t nk sizes will have
more o less grid lines
"B'fac between grid lines
"A" Grid Line
Note: Longitudinal measurements along
each grid line are no further than 3 feet apart.
Note: Grid lines H, I, J, and K are to be measured
if visual inspection shows cause for the
mesurement.
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ULTRASONIC TANK TESTING FIELD FORM
Company: Location: Tank Assignment:
Western Slope Materials
Inspector: Tank Contents: Shape/Orientation: Date:
Equipment Make/Model: Calibration
Hitachi HT300 Ultrasonic Digital Thickness Meter
TANK SPECIFICATIONS
Manufacturer: Model/Description: Manufactur Date: Length Diameter Capacity
Tank Sketch: Tank ID:
Material/Surface
Coating:
Notes:
Stationing for 1 foot square grids used during tank UT testing was
established with letter designations (A thru CC) around the
circumference of the tank and number designations (1-22 or the
actual length of the tank) along the horizontal axis of the tank.
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TANK THICKNESS MEASUREMENTS
GRID T1 T2 T3 T4 AVG GRID T1 T2 T3 T4 AVG
DATA SUMMARY SHELL WALL THICKNESS
Overall Average Thickness
Minimum Average Thickness
Minimum Thickness Reading
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