HomeMy WebLinkAboutOWTS Site PlanOWTS DESIGN CALCULATION
GENERAL NOTES
GRAPHIC SCALE
10 p 5 10 26 l
1 f �
h 1
BATHROOM FACILITIES, ONE ROOM APARTMENT AND RV CAMPER + IN FEET)
f ■ I 1 inch = 10 ft.
/ I EXISTING AS -CONSTRUCTED NOTE:
I ' IT APPEARS THAT THE EXISTING OWTS WAS CONSTRUCTED TO SERVE THE EXISTING
USES ASSOCIATED WITH THE ADJACENT GARAGE/APARTMENT STRUCTURE
L 20.0
S� \
EXISTING 4" TRANSPORT PIPE EXISTING MOUNDED AREA CONTOURS 1
N,
RECOMMENDED LOCATION OF OWTS PUMP CONTROL PANEL
INSTALL PUMP CONTROL BOX IN LINE OF SITE WITH TANK
ELECTRICIAN TO PROVIDE CIRCUITS & WIRES FOR PUMPS &
EXISTING TANK \ \ CONTROLS TO CONTROL PANEL. ELECTRICIAN TO CONFIRM
t \ \ WIRE GAUGE SIZE & COORDINATE INSTALLATION WITH PUMP
SUPPLIER/ INSTALLER.
i• \ I l \ \ `� - NG 1000 GALLON 2-COMPARTMENT COPELAND TANK -
� t
/ - EXISTING -PUMP ASSEMBLY AND RISERS TO BE UPGRADED
EXISTING COPLAND TWO COMP CONC. SEPTIC TANKS IN SERIES,.
TO BE MAINTAINED FOR CONTINUED USE '� ,► \
f?CISTING IPRESSIJRE MANIFOLD TO BE UPGRADED
_ \
\ EXISTING 2-COMPARTMENT 10OD-GALLON CONCRETE SEPTIC/DOSING TANK ! _ .
\ INSTALLED WITH CONCRETE RISERS W/ LIDS ATTHE EXISTING SURFACE. ` EXISTING 24" DEPTH SAND FILTER CHAMBER BED WITH 3 ROWS `
INSTALL NEW ORENCO BIO TUBE SIMPLEX EFFLUENT PUMP ASSEMBLY. Q-4 CHAMBERS & ENDCAPS W/ 1.5" PVC PERF DISTR LATERALS
\ (PVUS7-1819-L) W/P300S11 PUMP), W/ 1.5" DISCHARGE ASSEMBLY. COMPONENTS TO BE RECOVERED, REMOVED, STAGED & RESET
W/ NEW 24" DIA X 30" DEEP RIBBED PVC RISER & FIBER LID PER PROPOSED OWTS FIE EPAIR/DESIGN EXPANSION
\ DEPTH TO TOP OF TANK FROM FINISH GRADE IS APPROX. 2.5'. 26.
� 1.5" SCHD-40TRAN5PORT PIPE WJ 2.0' MIN. DEPTH OF BURY. --- �
\ INSTALL AT MIN. 2.5%FOR DRAINRACK
_ EX 1.5" PVCTRANSPORT & MANIFOLD DISTRIBUTION PIPE ASSEMBLY TO
BE REPAIRED & RESET FOR PROPOSED FIELD DESIGN/ EXPANSION
1.5" PVC MANIFOLD WITH CONNECTION FITTINGS TO EACH
PERFORATED DISTRIBUTION LATERAL
INSTALL 1 1/2" PVC SCHD-40 CUSTOM PERFORATED
DISTRIBUTION LATERALS. DRILL 5/32-INCH DIA.
k ORIFICES EVERY 2.5-FEET ALONG PIPE. /
_ TREATMENT LEVEL 3 PRESSURE DOSED SAND FILTER ABSORPTION/TREATMENT BED '
INSTALL 24 QUICK-4 CHAMBERS IN 3 ROWS IN A SINGLE (47' BY IT) MOUNDED BED
1 , WITH 11 CHAMBERS PER ROW FOR USE AS SPRAY SHIELDS OVER THE 563 S.F EXPANDED�s I
SAND FILTER BED ABSORPTION AREA. THE SYSTEM SHALL BE PLUMBED FOR EQUAL
1I PRESSURE DISTRIBUTION. THE SAND, DISRIBUTION LATERALS & CHAMBERS SHALL BE
INSTALLED ON LEVEL GRADE IN THE BED.
A MINIMUM 24-INCHES OF FILTER SAND TO BE PLACED OVER CLASS-3 PITRUN
MATERIAL SUBGRADETO BE PLACED ATA LEVEL APPROXIMATELY TO FEET ABOVE EX
�. SURFACE GRADES TO MATCH EX15TING MOUNDED BED. SAND TO BE PLACED AS
► REQUIRED OVER THE ELEVATED SUBGRADE TO MAINTAIN THE SPECIFIED TOP OF SAND
LAYER ELEVATION SET A MIN. 30-INCHES ABOVE THE BFE LIMITING LAYER (EL=5425±).
` THE Q-4 CHAMBERS TO BE PLACED OVER THE TOP OF THE SAND LAYER, COVERED WITH
FILTER FABRIC, BACKFILLED WITH A MIN OF 8" OF ADDITIONAL SAND AND/Oft NATIVE
SOILAND CAPPED WITH 4" OFTOPSOIL. THE UP GRADIENT FINISH SURFACE OF THE FIELD
SHALL BE MOUNDED A MINIMUM 4-FEET ABOVE EXISTING ADJACENT GRADES.
t
1
OWTS PLAN
l �
\ t
t
6" VALVE BOX
4" INSPECTION PORT RISER
SEED AND MULCH FINISH CROWNED TOPSOIL
SURFACE MAINTAIN SUITABLE VEGETATIVE COVER CUSTOM PERFORATED PRESSURE PIPE
WITH ORIFICES AT 12 O'CLOCK. SECURE
MIN. 4" TOPSOIL PIPE WITH PUSH IN STAPLES
INFILTRATING CHAMBER UNIT ( SPRAY SHIELD)
SCREENED BACKFILL 12.0' QUICK-4
NATIVE SOIL 1• FINISHED GRADE
2,9'
z 5' NATIVE LOAM EMBANKMENT
3 0, FILL PLACED @ 3:1 SIDESLOPE
PRESSURE DISTRI UTION PIPE CONNECTED 1
THROUGH END CAP O CUSTOM PERFORATED EXI ING GRADE
DI TRIBUTION LATERAL PIPE
SCARIFY/TILL BOTTOM SURFACE AND
EXCAVATION SIDE WALLS UNDISTURBED EARTH
SANDY SILT LOAM
NOTE:
THE INTERMITTENT SAND FILTER BED MUST BE LEVEL. INSTALL CHAMBERS WITH END CAPS
OVER SAND LAYER FOR USE AS SPRAY SHEILDS. INSTALL DISTRIBUTION MANIFOLD PIPE ATTHE
HEAD OF EACH CHAMBER DISTRIBUTION LATERAL ROW. CUSTOM PERFORATED PIPE TO BE
LAID ON TOP OF THE SAND LAYER WITH ORIFICES ORIENTED UPWARD EXCEPT THE FIRST AND
LAST ORIFICES TO BE ORIENTED DOWNWARD. INSTALL A4" VERTICAL INSPECTION RISER FROM
THE MOLDED CUT OUT ON THE END CAPS OF EACH ROW. INSTALL A BALL VALVE ON THE
TERMINAL END OFTHE DISTRIBUTION LATERAL ACCESSIBLE FROM THE INSPECTION PORT TO
ALLOW FLUSHING OF THE LINE. THE VALVE IS CLOSED FOR NORMAL OPERATION.
TYPICAL YARD LANDSCAPED SURFACE
OR AGGREGATE PAVED SURFACE
EXCAVATED MATERIAL
COMPACTED TO 90%
4" STANDARD PROCTOR
4" I-\_ NATIVESCREENED
4„ OR CL-6 ABC
TRENCH CROSS-SECTION FOR
SDR-35.0 SCH-40 PIPES
N.T.S.
1.1
6" VALVE B(
EXTEND 4" RISER PIPE MIN. 3"
THROUGH END CAP OR CHAMBER
PRE FORMED PENETRATION
SECURE WITH SCREWS THROUGH
PENETRATION FLANGE INTO PIPE
6" VALVE BOX
PUSH ON CAP
4" INSPECTION PORT
QUICK-4 INFILTRATOR
Pmr) rAQ
Quic
(to scale)
0...-_' LX 1G FIL
1�
40
ti -
ED WiT DISTRJ UTION LATERALS USING INFILTRATOR CHAMBERS AS SPRAY SHIELDS
i l
PROP05ED MOUNDED AREA CONTOURS
SURFACE ELEVATION OF MOUND = 5430.S
1 TALL 4" RISER PIPE INSPECTION PORT EXTEND RISER W/
PU H ON CAP MIN. 4" BELOW FINISH GRADE & COVER WITH 6"
DIA VALVE BOX SET WITH LID 1" ABOVE FINSH GRADE
(TY . EACH TRENCH CHAMBER END CAP)
IN ALL HAMBERENDCAP
O ALL ND CHAMBERS
12.0
J
J
l
EAGLE NEST EFFLUENT DISCHARGE TO SAND FILTER BED
DOSI NG CALCS
TOTAL VOL 1.5" TRANSPORT PIPE
0.7
GAL
SUMTOTAL PIPE/DRAINBACK VOL
0.7
GAL
VOL 1.5" MAINIFOLD PIPE
0.7
TOTAL VOL 1.5" DISTRIBUTION LATERALS
12A
VOL TO DELIVER 3X DISTRIBUTION LATERALS
37.2
GAL
TOTAL VOL All PIPES, + DRN BACK
13.1
GAL
TOTAL VOL PER PUMP CYCLE 4X LAT VOL
50.3
VOL 2ND COMP 1000 GAL TANK GAL
449.0
gal
POSING COMPARTMENT STAGE VOL GAL/IN
9-76
GAL/IN
ON/OFF FLOAT SPREAD SETTING
5.2
IN
MIN DESIGN PUMP DISCHARGE RATE
37
GPM
PUMP RUN TIME
1.4
MIN
MIN PUMP TIME TO DELIVER DOSE
1.0
MIN
PUMP TIME TO FILL PIPES
0-4
MIN
DEMAND DOSE FLOAT LEVEL SETTINGS 1000 GAL SECOND COMP
TANK
FLOAT) LL BELOWOP OF
T TANK
DE LL FIR HOT
DEPTH
FLOAT FIR TOT
STAGE ABOVE BOTTOM INTTANK
IN
IN
HIGH LIQUID LEVEL INV IN
46
68.0
3RD FLOAT HL ALARWOVERRIDE
43.D
25.o
2ND FLOAT PUMP ON
40,0
28.0
I ST FLOAT REDUNDANT OFF
34.8
33,2
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SYSTEM PERFORMANCE DOSING PUMP CURVE
Design Calculations OWTS
The existing structure has a deisgn flow based on 1 bedroom studio apartment, and a single RV trailer
with sewer hookup- The facility will likely include the addition of 4 campsites without sewer or water
hook ups. Minimum design flow is equivalent to 3 bedroom residential usage. Alternative: 1 additional
1 bedroom studio apartment and 1 campsite without sewer or water hook up.
Design Flow Criteria: Minimum population based on 2 people per 1 bedroom studio apartment and
number of campsites without water or sewer hookups.
1 Bedroom apartment = 2 persons @ 75 gal/person/day,
RV space with sewer hookup = 1 @ 100 gal/space/day
4 campsites @ 50 gal/campsite/day
Design flow Qd = (2 x 75)+ (1 x 100) + (4 x 50) = 450 gpd
Septic Tank Design: 2-Day detention time = 450 x 2 = 900 gallons required.
There are two existing 1000 gallon concrete Copeland tanks in series that need an upgraded effluent
pump system to dose the existing and proposed expanded mound sand filter. The second
compartment of the the second tank in series will be equipped with a bio-tube simplex high head
effluent pump dosing assembly.
Sub Surface Conditions and TestinE:
The permitted Design was for a typical pressure dosed mound system with top of the specified filter
media and base fill installed above the the limiting layer that is the base floodplain elevation. Previous
design criteria and soil infiltration rates, established by Gamba and Associtates in 2015, were based
equivalent percolation rates for specified imported sand and gravel base materials to be placed over
the native shallow silt loam overlying typical alluvial soils. The soils in the area of the proposed
absorption field have very shallow topsoil underlained by alluvium soils in a shallow silt loam matrix.
The imported gravel pit based materials specified to to create the mound foundation are assumed to
have an equivalent percolaton rate of 20 mpi for basal area design purposes. Gravelly sand and sand
filter materials typically have equivalent percolation rate of 5 to 15 mpi. This previous desgin criteria is
consistent with typical mound systems placed overalluvial floodplains.
Subsurface soil investigations and USDA soil texture method tests were performed by Sopris
Engineering in July of 2022. The soils in the area of the proposed absorption field were sampled and
characterized by application of the USDA soil texture method test- The soils below nil to 3 inches of
topsoil consist of medium dense gravelly silt loam material to 1 to 2 feet below the surface. The soils
become increasingly rocky with depth. The soil appears to be consistent across the designated field
envelope.
The native soils observed 1.5 feet below the surface are characterized as a soil type 2 soil consisting of
sandy gravelly silt loam texture with fine granular structure. This soil has an effective loading rate for
conventional soil treatment of 0.6 Gal/5.F./day for a level 1 conventional treatment system- Soils
below 2 feet are characterised as Type R1 sails with rock content greater than 35% and less than 65%
with 50% of the rock content size less than 3/4 inch. The rocky soils at depth have an effective loading
rate for of 0.8 Gal/S.F./day for a level 1 treatment system. To be consistent with the previous design
criteria with respect to limiting layers the expansion and refurbishment of the existing an intermittent
sand filter is recommended to provide for a treatment level TL3 mounded sand filter system. No free
water was encountered in shallow excavation on site at the time of exploration. Normal Groundwater
levels are expected to be below 3-4 feet below existing surface grades, seasonal high groundwater
levels are expected to be 2 foot below existing surface grades and the 100-year flood plain base flood
elevation has previously been determined to at elevation 5425+/- approximately 1 foot below the
existing surface grade.
Additional observations and soil evaluation will be performed, bySopris Engineering, during
construction priorto placement of the base course class-3 and enchanced sand filter media materials in
the area of the proposed mounded treatment/absorption field to confirm native soil interface and
installation of select fill materal. If any adjustments to design or installation recommendations are
necessary notice will be made to County EHD and applicable revisions to design/construction plans and
report will be submitted. All conditions and installations will be included in the As -Constructed
documentation.
Intermittent Sand Filter Treatment Unit/ Absorption System Design
The treatment/absorption field upgrade is designed based on utilizing the effective Long Term
Acceptance Rate (LTAR) for an intermittent sand filter treatment system utilizing pressure dosed
distribution laterals and gravelless chamber units as spray shields- The upgraded mounded
treatment system will consist of a fully pressure dosed sand filter Treatment bed with a 24-inch
layer of filter sand (ASTM-33, "washed ASTM-33 Concrete sand").
Long Term Acceptance Rate (LTAR)
Considering the application of regulation 43 design criteria of unlined sand filters receiving
septic tank effluent, pressure dosed sand filter results in the applied effluent to be treated to
Wastewater Treatment Level 3 quality prior to infiltration into base and native soil basal area:
The design area for a treatment level 3 5TA is sized per the maximum LIAR of (1.1 gai-/S-F./day)
for type 2 receiving soils or the maximum LTAR of 0.8 gal/S.F./day for the minimum 24" depth
of secondary sand treatment media whichever results in the larger area;
The maximum Loading rate for this design is therefore 0.8 gal./sq.ft./day The 5TA is designed
utilizing a loading factor of 1: (Table 10-2, pressure dosed application bed = 1.0 }
A(sf) = Qd x L.F. A = Area;
LTAR LTAR = 0-8 Gal/S.F./day for secondary sand, ASTM-33, "
Concrete sand"
Qd = flow (gal/day) = 450 gpd
L.F.1= 1-D pressure dosed bed
A(sf) = 450 gpd x 1.0 = 563 S.F.
0.8 Gal/S.F./day
Existing A(sf) = 26.5*12 = 318 S.F. 562.5 - 318 = 244.5 S.F. additional filter area required.
The single 26.5' by 12' mounded sand filter bed with a minimimum 24-inch depth of ASTM-33,
concrete sand will be extended to 47' of length over shallow native soils and imported Class-3
pit run material placed over native soil to the specified depth at the bottom of sand. Extend 3
rows of custom perforated 1.5 inch distribution laterals on top of sand layer and cover with 8
Quick-4 chambers per row for use as pressure dose spray shields, as delineated on the plan.
Backfill entire bed with native soil 8 to 12 inches above the top of chambers.
TESTING, INSPECTIONS AND CONSTRUCTION MANAGEMENT
1. PRIOR TO CONSTRUCTION OF THE PERMITTED SYSTEM THE ENGINEER SHOULD BE CONTACTED BY
THE PROJECT MANAGER/CONTRACTOR WELL IN ADVANCE TO PROVIDE ADEQUATE TIME TO DISCUSS
THE SYSTEM COMPONENTS WITH THE CONTRACTOR, ANSWER QUESTIONS, RESOLVE ANY CONFLICT
ISSUES AND SCHEDULE INSPECTION SITE VISITS BASED ON CONSTRUCTION PROGRESS. A PRE-OWTS
CONSTRUCTION MEETING WITH THE ENGINEER, SUPPLIER,THE CONTRACTOR, ELECTRICIAN AND
THE QUALIFIED INSTALLER 15 E5SENTIAL AND REQUIRED PRIOR TO INSTALLATION OF THE OWTS
COMPONENTS. PRE CONSTRUCTION CONSULTATION INSPECTIONS AND STARTUP BY QUALIFIED
SERVICE PROVIDER.
2. REGULATIONS REQUIRE THAT THE DESIGN ENGINEERS OF RECORD PERFORM SITE INSPECTIONS OF
THE PERMITTED SYSTEM DURING CONSTRUCTION AND PROVIDE "AS -CONSTRUCTED"
DOCUMENTATION OF THE INSTALLED SYSTEM TO THE THE COUNTY LPHA AFTER CONSTRUCTION IS
COMPLETE. THE ENGINEER SHOULD BE CONTACTED AND NOTIFIED OF THE CONSTRUCTION
SCHEDULE TO PERFORM TIMELY INSPECTIONS, PROVIDE DIRECTION TO CONTRACTOR REGARDING
THE INSTALLATION OF THE OWTS COMPONENTS AND AT LEAST48 HOURS PRIOR TO FINAL
BACKFILL OF COMPONENTS.
3. THE COUNTY ENVIRONMENTAL HEALTH DEPARTMENT SHOULD BE CONTACTED AT LEAST48 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 COMPONENTS. The
Garfield County contact is: Ted White, P.E., Environmental Health Specialist III.Garfield County Public
Health; twhite@garfield-county.com, 970-945-6614 x 8106 (main office) or 970-230-2442 (mobile)
4. CONTRACTOR SHOULD DISCUSS ISSUES REGARDING SPECIFICATIONS, INSTALLATION AND
OPERATION OF OWTS MECHANICAL SYSTEMS AND CONTROLS WITH THE MANUFACTURERS
REPRESENTATIVE AND/OR THE ENGINEER.
5. OUR DESIGN AND RECOMMENDATIONS ARE BASED UPON OUR EVALUATION OF THE EXISTING AND
PROPOSED SITE CONDITIONS, THE PREVIOUS PERMIT DOCUMENTS, THE DEVELOPMENT PLANS AND
INFORMATION SUPPLIED TO US BY OTHERS. IF DEVELOPMENT PLANS OR SITE CONDITIONS ARE
FOUND TO BE DIFFERENT FROM CONDITIONS ASSUMED OR INDICATED, WE SHOULD BE NOTIFIED
TO EVALUATE ANY EFFECT ON THE PROPOSED OWTS.
S. CONTRACTOR SHOULD REVIEW ANY CONDITIONS ON THE ISSUED PERMIT AND COORDINATE WITH
THE ENGINEER REGARDING CONSTRUCTION OF THE SYSTEM. IF YOU HAVE ANY QUESTION OR NEED
ANY ADDITIONAL INFORMATION, CALLTHE ENGINEER, PAUL RUTLEDGE, 50PRIS ENGINEERING, 970
704 0311.
1. THE OWTS AS SHOWN ON THE PLAN AND THE DETAILS WERE DESIGNED BY 50PRI5 ENGINEERING.
2. THE PROPOSED LOT CONDITIONS BY SOPRIS ENGINEERING.
3. THE EXISTING LOT CONDITIONS PER COUNTY GIS DATA BASE, GAMBA ISDS, AERIAL MAPPING, AND
SURVEY INFORMATION FROM TOPOGRAPHIC SURVEY, BY SOPRIS ENGINEERING.
4. PRIMARY OWNER NAME & ADDRESS: RIVER NEST LLC
361 COUNTY ROAD 311, SILT CO 816S2
S. LEGAL SUMMARY: SECTION: 10 TOWNSHIP: 6 RANGE: 92 A TR IN LOT 9 OF SEC 10. 6.784 ACRES
6. SITE ADDRESS: 361 COUNTY RD 311, SILT, CO 816S2
7. PARCEL NUMBER: 217910400516
8. PREVIOUS GARFIELD PERMIT # 5EPT-11-13-3052
9. NEW GARFIELD COUNTY PERMIT #: , ISSUED
10. CONTRACTOR:
OWTS SYSTEM NOTES
1. ALL MATERIALS AND INSTALLATION SHALL CONFORM TO STATE AND COUNTY ONSITE WASTEWATER
TREATMENT SYSTEM (OWTS) REGULATIONS.
2. IT IS THE RESPONSIBILITY OF THE CONTRACTOR TO CONTACT ALL UTILITY COMPANIES FOR FIELD
LOCATIONS OF UTILITIES PRIOR TO CONSTRUCTION AND EXCAVATION.
3. ALL SEWER LI NES TO BE SDR-35 BEDDED IN CLASS 6, SDR-26 BEDDED IN SCREENED NATIVE OR
SCHEDULE 40 P.V.C. PIPE BEDDED IN SCREENED NATIVE MATERIAL UNLESS NOTED OTHERWISE.
4- THE SEPTIC TANK SHALL BE INSTALLED LEVEL ON COMPACTED EARTH. I NSTALL WATERTIGHT RISERS AS
NECESSARY TO BRING ALL REQUIRED ACCESS POINTS TO THE FINISHED SURFACE GRADE.
5. A SAN ITARY BAFFLE TEE IS REQUI RED ON THE SEPTIC TANK INLET AND OUTLET. I NSTALL THE INLET AND
OUTLET TEES PLUMB AND IN A POSITION TO ALLOW EASY INSPECTION AND MAINTENANCE OF TANK
FROM THE TANK RISERS.
7. A 4" EFFLUENT FILTER MUST BE INSTALLED ON THE OUTLET TEE OF THE LAST SEPTIC TAN K.
8. THE CONTRACTOR SHALL ENSURE THATTHE SEWER LINES, SEPTIC TANK AND RISERS ARE WATERTIGHT.
ALL PLUMBING FIXTURES AND OWTS COMPONENTS SHALL BE INSTALLED AND MAINTAINED TO AVOI D
SURFACE OR GROUNDWATER FROM ENTERING THE SYSTEM AND TO PREVENT LEAKAGE FROM THE
SYSTEM.
9. THE 5TA BED SURFACE MUST BE CROWNED TO DIVERT SURFACE DRAINAGE AWAY FROM THE BED.
10. THE DIMENSIONS SHOWN ON THE PLAN INDICATE MINIMUM AREA AND SEPARATION DISTANCES FOR
THE OWS COMPONENTS.
11. THE BED SHALL BE LEVEL WITH DISTRIBUTION PIPES INSTALLED FOR EQUAL PRESSURE DISTRIBUTION.
12. THE BED SHALL BE OVER EXCAVATED TO ALLOW PLACEMENT OF THE SPECIFIED SAND FILTER
TREATMENT MEDIA LAYER. THE BOTTOM SURFACE AND SIDEWALLS OF THE TRENCH TO BE SCARIFIED
AND RAKED AS NECESSARY PRIOR TO PLACEMENT OF THE SAND.
13. THE TREATMENT BED SHALL BE CONSTRUCTED WITH CHAMBER UNITS PLACED OVER THE SPECIFIED
SAND LAYER FOR USE AS SPRAY SHIELDS. THE CHAMBERS, SAND AND DISTRIBUTION PIPES SHALL BE
COVERED WITH FILTER FABRIC TO THE SIDES OF THE EXCAVATION.
14. THE MINIMUM COVER OVER THE TOP OF THE CHAMBER SPRAY SHIELD UNITS SHALL BE 8" NOT TO
EXCEED 12"-
15. THE BED CHAMBERS WILL BE BACKFILLED TO THE SURFACE WITH EXCAVATED MATERIAL VOID OF
ROCKS. THE BACKFILL MATERIAL SHALL NOT EXCEED 3" DIAMETER. A MINIMUM 4" DEPTH OF TOPSOIL
IS TO BE PLACED ABOVE THE BACKFILLTO THE FINISH SURFACE GRADE.
16. BALL VALVES (SIZE PER PLAN) SHALL BE INSTALLED ON THE TERMINAL ENDS OF THE PERFORATED
DISTRIBUTION PIPE JUST BELOW THE 4" INSPECTION PORTS.
17. ALL INSTALLATION OF THE CHAMBER UNITS SHALL BE IN CONFORMANCE WITH THE MANUFACTURES
INSTALLATION INSTRUCTIONS.
THE ABSORPTION FIELD SHALL BE INSTALLED PER THE REQUIRED SETBACK DISTANCES:
10 feet from any property line.
25 feet from any potable water supply line.
20 feet from any occupied dwelling.
100 feet from any well, spring or cistern.
25 feet from drainage Swale or ditches
EFFLUENT DISTRMUTION SYMM NOTES
1. FILTERED EFFLUENT WILL DISCHARGE TO THE TRENCH LATERALS VIA A SIMPLEX HIGH HEAD PUMP
BIOTUBE DISCHARGE ASSEMBLY TO A COMMON MANIFOLD AT THE HEAD OF THE 5TA BED OR
TRENCHES THAT CONNECTS TO THE DISTRIBUTION LATERAL ROWS.
2. THE DISTRIBUTION SYSTEM WILL BE INSTALLED TO ALLOW FOR EFFLUENT TO BE EQUALLY
DISTRIBUTED ACROSS THE ABSORPTION SURFACE IN EACH TRENCH VIA INDIVIDUAL CUSTOM
PERFORATED FULL PRESSURE DISTRIBUTION LATERALS CONNECTED TO THE MANIFOLD PIPE AT
THE HEAD OF THE BEDS OR TRENCHES INSTALLED ON TOP OF THE SAND MEDIA SURFACE ALONG
THE ENTIRE LENGTH OF THE INDIVIDUAL LATERAL ROWS. A BALL VALVE WILL BE INSTALLED ON
THE TERMINAL END OF EACH DISTRIBUTION LATERAL CENTERED BELOW AND HOUSED IN A
VALVE BOX WITH LID SET 2" ABOVE SURFACE GRADES.
3. THE MINIMUM SLOPE OF THE TRANSPORT PIPE FROM THE TANK'S DOSING COMPARTMENT TO
THE MANIFOLD SHALL BE INSTALLED ATA MINIMUM 2.5% UPWARD SLOPE TO ALLOW FOR
DRAINBACK TO THE PUMP VAULT.
;ELECTRICAL, NOTES MF omw Pump Amy
1. AN ORENCO SYSTEMS CONTROL PANELS SHALL BE INSTALLED BY A ELECTRICIAN IN
COORDINATION WITH THE CONTRACTOR AND THE TREATMENT SYSTEM SUPPLIER/SERVICE
PROVIDER. ELECTRICIAN TO PROVIDE ELECTRIC SERVICE FOR SPECIFIED VOLTAGE RATING OF
PUMP(S) AND CONTROLS. THE POWER SUPPLY FOR THE PUMP(S) AND CONTROLS SHALL CONSIST
OF A 20 AMP DOUBLE POLE CIRCUIT FOR EACH PUMP AND 10 AMP SINGLE POLE CIRCUITS FOR
CONTROLS. CONTROL PANEL PANEL TO BE INSTALLED BY ELECTRICIAN IN LINE OF SITE WITH
TANK AND/OR PUMP BASINS.
2. THE ELECTRICIAN SHALL INSTALL ELECTRICAL SUPPLY WIRE IN CONDUIT FROM A ELECTRICAL
SERVICE CIRCUIT BREAKER BOX TO THE REMOTE SUPPORT MOUNTED ORENCO CONTROL PANEL
LOCATED IN LINE OF SITE ADJACENTTO THE SECOND COMPARTMENT TANK RISER.
3. ELECTRICIAN TO WIRE ELECTRIC SUPPLY INTO CONTROL PANEL CIRCUITS AND INSTALL CONDUIT
FOR PUMP AND CONTROL WIRES OUT OF CONTROL PANEL AND IN TO THE EXTERNAL SPLICE BOX
MOUNTED ON THE EXTERIOR OF THE PUMP BASIN TANK RISER.
4. THE SYSTEM QUALIFIED INSTALLER SHALL INSTALL ELECTRICAL DIRECT BURY WIRES THROUGH
THE INSTALLED CONDUITS FROM THE CONTROL PANELTO THE EFFLUENT PUMP ASSEMBLY'S (IF
APPLICABLE) EXTERNAL SPLICE BOXES ON THE RESPECTIVE TANK ACCESS RISER. INSTALL COLOR
CODED OR LABELED WIRES PER CONTROL PANEL DIAGRAM- INSTALL ALL WIRES FOR PUMP(5)
AND CONTROLS WITH CONDUIT SEAL AT THE SPLICE BOX. ELECTRICIAN TO COORDINATE WJ
SYSTEM INSTALLER. FOR PUMP AND CONTROL INSTALLATION. INSTALLATION CONSULTATION
BY VALLEY PRECAST, INC. AND SOPRIS ENGINEERING.
FINAL DRAFT PLAN FOR REVIEW
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DESIGNED BY PER 09-12-23
DRAWN BY PER 08-23-23
CHECKED BY YTN 08-14-23
DATE: 09-14-23
JOB NO. 32128.01
SHEET C-1