HomeMy WebLinkAboutOWTS DesignTF"
Design Calculations OWTS
OPRIS ENGINEERING, LLC.
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SITE PLAN
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The design flow is calculated as follows for the total waste flows of the from the existing single
family residence. The waste flaw from the existing residence has been served by a OWTS permitted
GENERAL
NATES
CIVIL CO NSU LTANTS
502 MAIN STR EET
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at the time of building permit in 1999, under County ISDS permit No. 3152 to serve a 5 -bedroom
CARBONDALE,
CO 81623
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residence. The unfinished lower level plumbing has not been in use to date however does have an
equipped interior ejector pump system in place that discharges into the gravity pipe to the existing
septic tank. This upgrade design proposes the continued use of the older chamber Bed in lace and
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1.
THE OWTS A5 SHOWN ON THE PLAN AND THE DETAILS WERE DESIGNED BY JEROME GAMBA &
ASSOCIATES.
{970) 704-0311
FAX: 1970]-704 0313
construction of additional soil treaternent area {STA}. The minor expansion and upgrade of the
2.
THE PROPOSED LOT CONDITIONS BYJEROME GAMBA & ASSOCIATES
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older system components will allow for expanded capacity and longevity of the residential system
be in OWTS design
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upgraded to compliance with current Regulation criteria. The original system
designed in ISDS design
3.
THE EXISITNG LOT CONDITIONS PER COUNTY GIS DATA BASE, LIDAR TOPOGRAPHY AND AERIAL
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was accordance with regulatory criteria adopted at the time of permit.
Based on current regulation 43 design criteria the existing system is slightly undersized for existing
MAPPING.
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+ EXCAVATION DEPTH 1' MIN. -4' MAX. BELOW SURFACE
INSTALL 4" RISER PIPE INSPECTION PORT
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and possible future usage. The existing functioning 1250 septic tank has been pumped a few times
over the ears and is equipped with sanita tees, however it is undersized for existing and possible
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4.
PRIMARY OWNER NAME & ADDRESS: KATHLEEN CLAUSEN &JAMES CLAUSEN, 17603 HIGHWAY 82
ACCESS ROAD, CARBONDALE, COLORADO
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GRADE MINIMUM. 12" COVER OVER TOP OF CHAMBERS
EXTEND RISER W/ PUSH ON CAP MIN. 4" BELOW FILL & GRADE FIELD AREA APPROXIMATELY 3"-6" ABOVE
FINISH GRADE &COVER WITH 6" DIA. VALVE BOX EXISTING SURFACE GRADES
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future usage. The upgrade will include installation of additional tankage, STA, distribution piping
and appurtenances to insure adequate capacity and functioning of the upgraded system to treat
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ane equivalent 6 -bedroom design flow,
5.
LEGAL SUMMARY: SECTION: 33 TOWNSHIP: 7 SOUTH RANGE: 87 WEST ATR IN THE 5W AKA LOT A
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SET WITH LID 1" ABOVE FINSH GRADE
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{TYP. EACH TRENCH CHAMBER END CAP] ADDITIONAL ABSORPTIONjTREATMENT FIELD •
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6.
SITE ADDRESS: 17603 HIGHWAY 82 ACCESS ROAD, CARBONDALE, CO 81623
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The existing system consists of a 1250 -gallon two-compartment concrete septic tank with gravity+t1
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ADD 20 QUICK -4 CHAMBERS IN 1 BED WITH TWO ROWS FOR ATOTAL ABSQRPTIO�AR 10
EXISTING PVC OBSERVATION 3.0 SYSTEM SHALL BE PLUMBED FOR EQUAL GRAVITY DISTRIBUTION. THE CHAMBERS HA�INSTALLED O
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STANDPIPE LEVEL GRADE IN THE TRENCH. THE BOTTOM OF THE BED IS TO BE EXCAVATED TO A MAXIMUM AVERAGE
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effluent piping to an approximate 788 S.F. chamber trench field consisting of 42 Standard Infiltrator
chamber units (6.25' X 2.83'). The STA bed was constructed with 6 rows containing 7 chamber units
in the flat lawn the dwelling. The distribution
7.
PARCEL NUMBER: 239133300034
DESIGNED BY
XXX
00/00/00
DRAWN BY
XXX
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3 DEPTH OF 36 INCHES BELOW THE EXISTING SURFACE GRADES, WITHIN THE UPPER HORIZON OF THE NATIVE per row area north of existing simple system consist of 8. EXISTING GARFIELD COUNTY BUILDING PERMIT # 7170, ISSUED MAY 1999
- diverging flaw split manifold with tee connections terminating to each individual distribution at
SANDY SILT LOAM SOILS & BACKFILLED WITH A MINIMUM 12 -INCHES OF COVEFOOVER THE CHAMBERS. THE �I
FINISH GRADE ACROSS THE FIELD SHALL BE SLIGHTLY MOUNDED A MINIMUM 6 -INCHES ABOVE EXISTING
ADJACENT GRADES.
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pipe pipe
the the head of each chamber row. The depth of the absorptive surface is approximately 2.5 -3-feet.
9.
EXISTING GARFIELD COUNTY ISDS PERMIT # 3152, ISSUED NOVEMBER 1999
CHECKED BY
XXX
00/00/00
1
PREVIOUS BE SITE PLAN
The treatment capacity for the upgraded system is designed for a minimum 6 -bedroom residence
10.
CONTRACTOR:
3.0
adequate for the existing 5 -bedroom single family home that will provide additional capacity for
OWTS
SYSTEM NOTES
DATE:
06-2I-22
additional usage as needed.
JOB NO
32146
42.0
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From the Regulation 43 usage table 1:
Minimum population based on 2 person per bedroom for the first 3 bedrooms = 6 persons and 1
person per bedroom for each additional 3 bedrooms = 3 persons for a total of 9 persons.
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1.
2.
ALL MATERIALS AND INSTALLATION SHALL CONFORM TO STATE AND COUNTY ONSITE
WASTEWATER TREATMENT SYSTEM {OWTS) REGULATIONS.
ALL SEWER LINES TO BE SDR OR SCHEDULE 40 P.V.C. PIPE UNLESS NOTED OTHERWISE.
6.3
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Gallons per day per person =75 gal/person/day, No peaking factor
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Max. Design flow (Qd)gallons/da [# f le) x (aV . flow)gal/person/day.
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3.
INSURE ATWO-WAY CLEAN OUT ON THE SERVICE LINE FROM THE BUILDING.
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6.0
INSTALL CHAMBER CAP
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Design flow Qd=9*75=675 gpd
4.
THE SEPTIC TANK SHALL BE INSTALLED LEVEL ON COMPACTED EARTH. INSTALL WATERTIGHT RISERS
A5 NECESSARY TO BRING ALL REQUIRED ACCESS POINTS TO THE FIN (SHED SU RFACE GRADE.
ON ALL END CHAMBERS
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IFOLD 5
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Septic Tank Design:
BACKFILL WITH SUITABLE NATIVE SOIL FREE OF BOULDER AND ROCK IN EXCESS OF 3" DIAMETER.
EXISTING SAT CHAMBER BED FIELD I CONCRETE DISTRIBUTION BOX WITH BAFFLE
788 S.F. ABSORPTION AREA INSTALLED LEVEL ON COMPACTED BASE
- INSTALL RISERS AND LID TO SURFACE
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The septic tank capacity required for a minimum 48 hour retention time is calculated as follows or
for minimum 1,750 gallon for 6 bedroom capacity:
5.
A SANITARY BAFFLE TEE IS REQUIRED ON THE SEPTIC TANK IN LET AND SECOND COMPARTMENT
OUTLET. INSTALLTHE INLET AND OUTLET TEES PLUMB AND IN A POSITION TO ALLOW EASY
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V = 675 gal/day * 2 = 1,350 gallons. Continue use of the 1,250 gallon, two compartment concrete
INSPECTION AND MAINTENANCE OF TANK FROM THE TANK RISERS.
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- INSTALL A 1060 GALLON SEPTIC TANK IN SERIES WITH
septic tank with sanitary tees and install in series a new 1,060 gallon, two compartment plastic
septic tank with an inlet sanitary tee and effluent filter outlet sanitary tee in the second
6.
INSTALL AN ORENCO BIOTUBE FILTER HIGH HEAD EFFLUENT PUMP ASSEMBLY IN THE SECOND
THE 1250 GALLON SEPTIC TANK
3.0 Ix INSTALL EFFLUENT FILTER ON OUTLET SANITARY TEE
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ALTERNATIVELY A 1000 GALLON CONCRETE SEPTIC
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compartment. The new tank shall be installed with sealed ribbed PVC or plastic risers and fiber or
plastic lids to the finish grade surface.The existing concrete tank shall be retrofitted with sealed
COMPARTMENT OF THE 2- COMPARTMENT SEPTICTANK. THE BIOTUBE FILTER SHOULD BE
INSPECTED EVERY SIX MONTHS. THE EFFLUENT FILTER SHALL BE MAINTAINED AND CLEANED WHEN
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• TANK CAN 8E USED
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ribbed PVC risers and fiber lids to the finish rade surface.
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THE TANK 15 PERIODICALLY PUMPED OR AS NECESSARY. INSTALL A SUITABLE EXTENSION ON THE
FILTER AND FLOAT TREE WITH A HANDLE TO BE WITHIN 6" BELOW THE ACCESS LID.
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� 4" PVC EFFLUENT PIPE @ MIN. 1 R6,
LOWER LEVEL FLOORPLAN
Sub Surface Conditions and Testing:
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4" PVC DISTRIBUTION PIPES (TYP.)
1060 Gallon 2CP
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A geotechnical study was performed by CTL Thompson, Inc., to support the original design with
7.
THE CONTRACTOR SHALL ENSURE THATTHE SEWER LINES, SEPTIC TANK AND RISERS ARE
WATERTIGHT. ALL PLUMBING FIXTURES AND OWTS COMPONENTS SHALL BE INSTALLED AND
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applicable findings presented in their letter/report " Percolation Test Results, Lot A Jowell
MAINTAINEDTO AVOID SURFACE OR GROUNDWATER FROM ENTERING THE SYSTEM AND TO
-
EXISTING 1250 GALLON SEPT
r . ' EXCAVATE TO TOP OF TANK
1111 1060.X. Infiltrator Poly Tank
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Subdivision", dated 10-23-1996, under project number GS -2011.
A profile and percolation borings were drilled in the area of the proposed OWTS field. The sails
PREVENT LEAKAGE FROM THE SYSTEM. IN-HOUSE PLUMBING FIXTURES SHALL BE MAINTAINED TO
PREVENT EXCESS WATER FROM ENTERING THE SEPTIC SYSTEM.
REPLACE RISERS AND LIDS WITH RIB PVC
y RECOVER DISTRIBUTION MANIFOLD PIPES INSTALL EFFLUENT FILTER ON OUTLET SANITARY TEE
ST BUTION BOK WITH RISER LID TO SURFACE
1 y ISTRIBUTION PIPING TO CHAMBER ROWS
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encountered in the profile borings generally consist of a gravelly sandy silt loam with scattered
cobbles and boulders. The borings indicate presence of a typical sandy, silt loam soil matrix.
Percolation test resulted in an average percolation rate of 15 minutes per inch and recommended a
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THE DIMENSIONS AND NOTES SHOWN ON THE PLAN INDICATE MINIMUM AREA, LENGTH, WIDTHS
AND SEPARATION DISTANCES FOR THE ABSORPTION FIELD COMPONENTS.
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design rate of 20 mpi that is consistent with a soil type 2, silt loam.. The soils evaluation did not
indicate the presence of any limiting soil or hydrological conditions.9.
THE ABSORPTION /TREATMENT BEDS SHALL BE EXCAVATED TO LEVEL GRADE IN NATIVE EARTH.62.7
THE BED BOTTOM AND SIDEWALLS SHALL BE SCARIFIED AND/OR RACKED IF SMEARING OCCURS. IF
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The chambers were installed in the native soils. A recent observation of an excavation on site indicated
soils of silt Team texture and consistent with the evaluations and reported conditions at the
EXCESSIVE LARGE COBBLES OR BOULDERS ARE ENCOUNTERED IN ANY PART OF THE EXCAVATION
OVER 6" FROM THE PROPOSED TRENCH BOTTOM SURFACE, OVER EXCAVATE AND BACKFILL WITH
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previous
time of permit application. No limiting conditions are expected. Potential ground water levels are
expected to be below 8' from existing surface grades. Wlth respect to current regulatory design criteria
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Mild
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the soil is assumed to be characterized as a soil type 2, pursuant to USDA soil texturelstructure
classification methods. The soils are expected to consist of silt loam to sandy silt loam with moderate
10.
THE TREATMENT ABSORPTION FI ELQ MUST BE GENERALLY MARKED AT THE FOUR CORNERS WITH
INSPECTION PORTS. THE FIELDS MUST BE PROTECTED FROM VEHICULAR TRAFFIC.
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granular to slightly blocky structure with scattered cobbles and boulders. The long term Acceptance
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rate (LTAR) for this type 2 soil is 0.60 gals/SF/day receiving residential septic tank effluent via a
treatment level 1 sail treatment unit (5TU). The original field was sized based on a percolation rate of
11.
THE ABSORPTION/TREATMENT FIELD SURFACES MUST BE SLIGHTLY MOUNDED TO DIVERT SURFACE
DRAINAGE AWAY FROM THE FIELD.
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20 mpi, Based on existing STA performance and expected soil conditions, the soils are suitable for a
shallow conventional shallow absorption field consisting of gravelless infiltration chamber units.
12.
THE TREATMENT FIELD SHALL BE INSTALLED PER THE REQUIRED SETBACK DISTANCES:
10 feet from any property line.
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Additional observations and soil evaluation will he performed prior to construction mobilization
and during construction, by Sopris Engineering in the area of the proposed absorption field and
tank to confirm the previous soil evaluation and design criteria. Sopris Engineering will observe
25 feet from any potable water supply line.
20 feet from any occupied dwelling.
100 feet from any well, spring or cistern.
100 feet from any stream or water course
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new profile pits in the area of the proposed absorption field. The soils will be sampled and
characterized by application of the USDA soil texture methods. The sails will be further evaluated
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Insulated lids evellehle t>�rar
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to determine the presence of any limiting soil or hydrological conditions, appropriate hydraulic
loading rate, absorptive surface level capacity and to verify treatment level design for the in-situ
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depth Is 6'
. Minimum at rated lauding trnon,w
Tann Iv net rot.d to ,er vehicular lmtrafftthe,
. E.tarier of manhela LbYM includes Ino }d16Wing {[Yl11xL}
womm� "DANGER na NOT ENTER: POISON
native soils. If soil conditions encountered require adjustments to design criteria or the design plan
notice will he made to County EHD and applicable revisions to design/construction plans and report
be submitted. The results of the additional soil evaluation and soil characterization will be
7� C��T �T�TtI ►1e�Es
y1r71niBV 11VN NLiCa�•
1. EFFUENT FROM EXISTING 1250 TANK WILL GRAVITY FLOW TO NEED 1000 GALLON TANK
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included in the As -Constructed documentation.
48
EQUIPPED WITH EFFLUENT FILTER. FILTERED SEPTIC TANK EFFLUENT WILL DISCHARGE TO A 7
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Wiggling Spoto Invert Dimensions Net Weight
Capacity
12' Lang x 7' Wide Inlet Outlet Length Wieth Heigh!
47" 44" 127" 62.2" 54.7" 1094 gal 320 lbs
rte`-
r�(' INFILTRATOR'
'nsssicA
Treatment -Soil Treatment Unit/ Absorption System Design
OWTS Design Criteria per Former RegulationCHAMBER
Existing OWTS Design per Former County ISDS Regulation:
PORT DISTRIBUTION BOX, WITH RISERS AND LID ATTHE SURFACE. INDIVIDUAL 4" DISCHARGE
PIPES FROM THE DISTRIBUTION BOX WILL CONNECT TO EXISTING AND PROPOSED PAIRED
BED ROWS AT A TEE ON THE EACH PAIRED 4" MANIFOLD PIPE.
2. THE DISTRIBUTION SYSTEM WILL BE INSTALLED TO ALLOW FOR EFFLUENT TO BE EQUALLY
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P"ne: 7194954 +1
C,: VALLEY F&L: 719,19&3727
Single family 5 -bedroom home Design Flow (Qd) = Q avg. flow [# of people x 75 gal/person/day
x 1.5 (peaking factor) = gal/day [design) @ 2 persons per bedroom
Qd 750 1.5 1125
DISTRIBUTED TO THE PAIRED CHAMBER ROWS FROM THE DISTRIBUTION BOX CONNECTED TO
THE HEAD OF EACH CHAMBER ROW.
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Qavg=5x2x75=750 gal/day = gal/day x = gal/day
PRECAST Inc. wtllbsft wwwmallelyprWastcom
Total Peak Design Flow is 1125gal/day
3. THE MINIMUM SLOPE OF THE DISCHARGE LINE FROM THE DOSING TANK TO THE
Bu/.na Visa, C4210r&d* :
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Required septic tank volume is 1125`1.25 =1406 gallons
DISTRIBUTION BOX SHALL SHALL BE INSTALLED ATA MINIMUM 1%SLOPE. THE INDIVIDUAL
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Installed total Septic Tank Volume is 1250 gallons
DISTRIBUTION LINES ATTHE DISTRIBUTION BOX TO THE HEAD OF EACH TRENCH SHALL BE
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INSTALLED ATA MINIMUM OF 0.596 SLOPE.
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Treatment Trenches Absorption/Infiltration Area Design:
Average percolation rate of 20 minutes per inch.
TESTING. INSPECTIONS AND CONSTRUCTION MANAGEI[II+iT:
EXTEND 4" RISER PIPE NATIVE, YARD OR LANDSCAPED
MIN. 3" THROUGH END SURFACE
A (sf) = (Qd *(t) %: where A = Area;
5 t = time in minutes per inch=20mpi
1. ADDITIONAL GEOTECHNICAL EVALUATIONS AND INSPECTIONS BY THE ENGINEER WILL BE
CAP OR CHAMBER PRE DISTRIBUTION BOX LID
Qd =flow (gal/day) = 1125 gpd
PERFORMED DURING INITIAL STAGES OF CONSTRUCTION TO VERIFY SOIL CONDITIONS AND
FORMED PENETRATION AT GROUND SURFACE
6" VALVE BOXSECURE WITH SCREWS
6"VALVE BOX THROUGH PENETRATION 6" MIN.
RISER SECTION
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A 40% reduction was applied to the calculated absorption area for the bed utilizing Standard
Infiltrator chamber units approved for an equivalent absorption area of 18.75 S.F. per (34" wide by
6.25' long unit) chamberunit.
OWTS DESIGN.
2. THE EVALUATI0NSAND INSPECTIONS MAY RESULT IN M ODI FI CATI ONS TO TH E DESIGN THAT
MAY INCLUDE FIELD LOCATION ADJUSTMENTS AND REGRADING IN SELECT AREAS IF NEEDED.
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CAP FLANGE INTO PIPE
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/ EXCAVATED MATERIAL COMPACTED
A(credit reduction) = 1125 *[20] X x 0.6 = 604 S.F.
SUFFICIENT NOTICE TO THE ENGINEER BY THE PROJECT MANAGER/CONTRACTOR NEEDS TO
BAFFLE 6" MIN.
4" INSPECTION PORT RISE 4" DISTRIBUTION
4" EFFLUENT PIPE FROM GRAVITY LINE
TO 9046 STANDARD PROCTOR
5
Number of Standard Infiltrator Chambers = 604 5F/18.75 = 32 Chambers. Installed 42 Chambers.
788 S.F. absorption area installed (credit)
BE MADE IN ORDER TO SCHEDULE THE SITE INSPECTIONS.
3. PRIOR TO CONSTRUCTION OF THE PERMITTED SYSTEM THE ENGINEER SHOULD BE
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DISTRIBUTION BOX FROM SEPTIC TANK
CONTACTED BY THE PROJECT MANAGER/CONTRACTOR WELL IN ADVANCE TO PROVIDE.
ADEQUATE TI ME TO DISCUSS THE SYSTEM COMPONENTS WITH THE CONTRACTOR, ANSWER
00 4" MIN.Treatment-Sail
Treatment Unit/ Absorption System Design
QUESTIONS, RESOLVE ANY CONFLICT ISSUES AND SCHEDULE INSPECTION SITE VISITS BASED
SUITABLE BACKFILL OR
The field is based design
ON CONSTRUCTION PROGRESS.
I'� CLASS 6 ROAD BASE
upgraded treatment/absorption sized on current criteria utilizing the
INVERT IN
QUICK -4 INFILTRATOR 8" AGREGATE BASE COURSE
COMPACTED SUBGRADE
effective Long Term Acceptance Rate (LTAR) for the native soils and the application of appropriate
loading factors for a sail treatment area system utilizing gravity distribution to gravelless chamber
beds.Thenew treatment system and absorption field will consist of distribution of septic
4. COUNTY REGULATIONS REQUIRE THAT THE DESIGN ENGINEERS OF RECORD PERFORM SITE
INSPECTIONS OF THE PERMITTED SYSTEM DURING CONSTRUCTION AND PROVIDE "A5 -BUILT"
QUICK -4 INFILTRATOR OR EQUAL BIO DIFFUSER COMPACTED SUBGRADE TRENCH CROSS-SECTION
FOR
gravity
tank effluent via a distribution box to individual chamber bed paired rows with treatment across
DOCUMENTATION E INSTALLED SYSTEM CONSTRUCTION I5
PATE
REVISION
0/00/00
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GINEOF
D B CONTTO ACTED A D NOTIFIED O
THE ENGINEER SHOULD 8E CONTACTED AND NOTIFIED OF THE CONSTRUCTION
END CAP CHAMBER SDR -35.6 OR SCHD-40 FIPES the native soil absorptive surface.
DISTRIBUTION BOA DETAIL
SCHEDULE.
INSPECTION PORT CONNECTION DETAIL N.T.S. N.T.S. CROWN FIELD TRENCH TO 4" PVC INLET PORT Long Term Acceptance Rate (LTAR): 5. THE COUNTY ENVIRONMENTAL HEALTH DEPARTMENT SHOULD BE CONTACTED AT LEAST 48
Considering the application of the state regulation 43:
N.T.S. DIVERT SURFACE WATER
IN END CAP
Receiving Wastewater Treatment Level 1; Soil type 2 loading rate for a silt loam is (0.6
HOURS PRIOR TO FINAL BACKFILL OF COMPONENTS TO PROVIDE ADVANCED NOTICE OF
CONSTRUCTION SCHEDULE IN ORDER TO PERFORM A FINAL INSPECTION OF THE IN PLACE
FILTER FABRIC
{-+ 4' MIN
gal./S.F./day).; Loading factors; [Table 10-2, Gravity application bed = 1.2 ] and
COMPONENTS. The Garfield County contact is: Ted White, P.E., Environmental Health
(Table 10-3, gravelless chambers = 0.71
Specialist III.Garfield County Public Health; twhite@garfield-county.com, 970-945-6614 x
REVEGATATION
BACKFILL WITH SCREENED TOPSOIL LAYER
A(sf) = Qd x L.F.1 x L.F.2 .: A = Area;
8106 {main office} or 970-230-2442 [mobile]
ONSITE SOILS FREE OF ROCKS IN
CONNECT INDIVIDUAL4" DISTRIBUTION PIPE EXCESS OF 3" DIAMETER OR USE 3/4"-::.;N
LTAR LTAR = 0.6 Gal/S.F./day for silt loam
Qd =flow (gal/day) = 675 gpd
6. OUR DESIGN AND RECOMMENDATIONS ARE BASED OUR SITE ASSESSMENT, SOIL
EVALUATIONS AND UPON INFORMATION SUPPLIED TO US 8Y OTHERS. IF SUBSURFACE OR
TO HEAD OF EACH CHAMBER TRENCH (TYPICAL EACH TRENCH). TO 1.5' SCREENED ROCK -<<
L.F.1=1.2 Gravity Distribution Bed
SITE CONDITIONS ARE FOUND TO BE DIFFERENT FROM CONDITIONS ASSUMED OR
INSTALL CONNECTION AS NEEDED FROM END OR SIDE INLET
PORT OF EACH INFILTRATOR CHAMBER END CAP. _
/
L.F.2=0.7 Chambers
INDICATED, WE SHOULD BE NOTIFIED TO EVALUATE ANY EFFECT ON THE PROPOSED OWTS.
IF THE COUNTY REQUESTS CHANGES OR MODIFICATIONS TO THIS DESIGN, WE SHOULD BE
BACKFILL LAYER NATURAL ONSITE LEACHING 1Z A(sf) = 675 gpd x 1.2 x 0.7 = 945 S.F. CONTACTED TO EVALUATE AND RESPOND TO THE REQUEST.
SOILS FREE OF ROCKS [ . CHAMBER
0.6 Gal/5.F./day
CHAMBER END CAP 7. CONTRACTOR SHOULD REVIEW ANY CONDITIONS ON THE ISSUED PERMIT AND COORDINATE
������/���f�`�����f�\ UNDISTURBED
6
Total STA Area Required per Reg 43 =945 5.F.
WITH THE ENGINEER REGARDING CONSTRUCTION OF THE SYSTEM. THE CONTRACTOR
LOAM SOIL. Existing STA area installed in-place =788 S.F. AND/OR SYSTEM INSTALLER SHOULD PHOTO DOCUMENT ALL PHASES OF OWTS
SCARIFY/TILL BOTTOM SURFACE TO A
Additional STA minimum Required =158 S.F.
CONSTRUCTION AND INSTALLATION OF COMPONENTS.
DEPTH OF 3"
Number of Quick -4 Infiltrator chambers 4'x3'x12"chambers:
8. IF YOU HAVE ANY QUESTION OR NEED ANY ADDITIONAL INFORMATION, PLEASE CALL PAUL
TITLE
OWTS
NOTE: ALL CHAMBERS IN THE BED MUST BE INSTALLED ON LEVEL GRADE
OVER 3"
158 S.F = 14 chambers; Install 20 chambers 12x 20 =240 SF;
RUTLEDGE AT 50PRI5 ENGINEERING, 704 0311.
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ASTM -33 FILTER SAND LEVELING COURSE.
12 S.F./Chamber
EXHIBIT
CHAMBER END CAP CONNECTION DETAIL MAXIMUM DEPTH OF TRENCHES NOT TO EXCEED 36" BELOW PROPOSED SURFACE
N.T.S. GRADES. INLET AND END CAPS ARE TO BE INSTALLED ON EACH END CHAMBER
Number of 5'x3' Bio -Diffuser chambers:
ROW. IF EXCESSIVE LARGE COBBLES OR BOULDERS ARE ENCOUNTERED IN ANY
158 S.F = 11 chambers; Install 16 chambers 15x 16 =240 SF;
PART OF THE EXCAVATION, OVER EXCVATE AND BACKFILL WITH SAND OR
15 S.F./Chamber
SUITABLE SCREENED NATIVE SOILS.
DRAWING NO.
CHAMBER BED CROSS SECTION DETAIL
Required STA area = 158 S.F. Recommend Installing 240 S.F.
N.T.S.
Use 20 Quick -4 Infiltrator chambers in a two row bed trenches 42' long by 3' wide with 10
CALL 2 -BUSINESS DAYS IN ADVANCE
C-0.0
chambers units per row plus two end caps as delineated on the plan or equivalent Bio -Diffuser
BEFORE YOU DIG, GRADE, OR EXCAVATE
FOR THE MARKING OF UNDERGROUND
chamber bed rows. The septic tank effluent will be gravity distributed to the head of each aired
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MEMBER UTILITIES
chamber raw via individual distribution es from a distribution box.