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HomeMy WebLinkAboutOWTS Design 03.25.2020a) 0 0 .0 a) Addendum /3 nna Svobo 4/13/2020 7:47 P civil \PS—SheetSet\SB—GfldCo_OWTS.dwg Plotte / -?1• I I I 4' -- E ---OH- x X X X X X F- - 100YEAR FLOOD PLAIN I' I I I I I I I I I I I / / / I / • I I .I X I' 1 I / 'I / / 0o 40, / `O n_ O EL.5454.01(F N / • • o- EL.5452.99(FG) i OH - N0„ X w,C ------------------------- ------- TI ------------ II ------------------------------------------- -OH- - X -- E- I I I 6"S 6"S 6"S 6"S 6"S 6"S - 8C1„Z ba„z 540 �A Q. Q. Q. CiN �1h Ill M 71 M Ill M el M GENERAL NOTES: 1. ALL MATER/ALS, INSTALLATION PRACTICES, SETBACK REQUIREMENTS, ETC., SHALL COMPLY WITH GARFIELD COUNTY ON-SITE WASTEWATER TREATMENT SYSTEM REGULATIONS. 2. GRAVITY PIPING IN THE SYSTEM SHALL BE 4" STANDARD SEWER PIPE (ASTM 03034 SDR 35) WITH MIN. 2% GRADE PRESSURE DISTRIBUTION PIPING SHALL BE CLASS 200 PVC, SIZED AS INDICATED ON DRAWING. 3. GRADE AROUND ABSORPTION SYSTEM TO DIVERT SURFACE DRAINAGE AWAY FROM THE SYSTEM. 4. ABSORPTION SYSTEM SHALL BE TIMED PRESSURED DOSED INFILTRATION CHAMBERS PLACED IN TRENCHES ON NATIVE MATERIAL. DESIGN CALCULATIONS (PER GARFIELD COUNTY OSWT REGULATIONS): SILT FARMS - 30 EMPLOYEES (GARFIELD OWTS REGULATIONS TABLE 6-2 FOR FACTORIES AND PLANTS EXCLUSIVE OF INDUSTRIAL WASTEWATER PER EMPLOYEE PER 8HOUR SHIFT - NO SHOWERS) 30 EMPLOYEES * 1 (8 HR SHIFT) * 20 = 600 GAL/DAY ADDITIONAL WASTEWATER USAGE PER MECHANICAL DEMAND CALCULATIONS 16,294 GALLONS PER 31 DAY MONTH => 526 GALLONS PER DAY QrorAL = 600 + 525 = 1,126 GAL/DAY 5. SEPTIC TANK SIZE : 48 HOUR MIN DETENTION OF INCOMING WASTE (43.9. B. b) SEPTIC TANK = 1.126 GALLONS/DAY * 2 = 2.252 GALLONS TANKAGE PROVIDED = 2.500 GALLONS 6. SIZE ABSORPTION SYSTEM • A GEOTECHNICAL INVESTIGATION DID NOT ENCOUNTER BEDROCK AND SUGGESTS BEDROCK IS GREATER THAN 8' BELOW GROUND SURFACE. • AN ONSITE SOILS INVESTIGATION WAS CONDUCTED IN NOVEMBER, 2019, THE SOIL CLASSIFICATION AT THE LOCATION OF THE SOIL TREATMENT AREA (STA) IS BELIEVED TO BE TYPE 3A TO A DEPTH OF 11 ' BELOW THE GROUND SURFACE THE LONG TERM ACCEPTANCE RATE FOR THIS SOIL ACCORDING TO REGULATION 43 IS 0.3 GPD/SF • QUICK 4 STANDARD CHAMBERS ARE PROPOSED FOR THE OWTS. A SIZE REDUCTION FACTOR OF a7 WAS APPLIED TO THE CALCULATED REQUIRED SOIL TREATMENT AREA AS ALLOWED IN REGULATION 43 TABLE 10-3. • INFILTRATOR/SAND BED SIZING: A = Q/LTAR Q = 1,130 GAL/DAY A = 1, 130/a3 = 3,770 SF AREDUCED = 3,770*0.7 = 2,640 • INFILTRATION CHAMBERS = 11 SF EACH. TRENCH WIDTH (W) = 3FT WIDE LF OF TRENCH REQUIRED LTOTAL= AREDUCED / W = 880LF PROPOSED TRENCH LENGTH (L) = 73.3 FT+2 (EITHER END OF LATERAL) = 75.3FT Na TRENCHES REQUIRED = 407 -AL / L = 12 TRENCHES. 20 CHAMBERS PER LATERAL => 240 TOTAL CHAMBERS => => => => DOMESTIC WELL > 100' FROM SOIL TREATMENT AREA (ABSORPTION FIELD) NO KNOWN WETLANDS AT SITE ALL COMPONENTS OUTSIDE 100 YR FLOOD PLAIN WATER COURSES >60.5' SEPARATION 8. PRESSURE DISTRIBUTION CALCULATIONS: • TO DECREASE FRICTION LOSS AND VOLUMES REQUIRED PER DOES, THE ABSORPTION AREA WILL BE SPLIT INTO 2 ZONES WHICH WILL BE DOSED ALTERNATING USING A DUPLEX PUMP SYSTEM. EACH ZONE WILL BE DOSED 4X PER DAY FOR A TOTAL OF 8 DOSES PER DAY FOR THE ENTIRE SOIL TREATMENT AREA. • PIPE VOLUMES TRANSPORT: 74.6 GAL MANIFOLD: 2(5.0) = 10.0 GAL LATERAL: 21.3 GAL DRAIN BACK VOLUME = VOL DISCHARGE PIPE = 74.6 GAL • MAX DOSE: <25% OF DAILY FLOW + DRAINBACK • - 0.25 * 1130 GAL + DRAINBACK = 281.5 GAL • MIN DOSE: 4X LATERAL VOLUME + DRAIN BACK • - 4 *21.3GAL + DRAINBACK = 42.6 GAL + 74.6 GAL = 1172 GAL/DOSE • DESIGN DOSE: 140 GAL/DOSE •- •- + 74.6 GAL = 356.1 GAL/DOSE 9. MINIMUM 2% SLOPE ON GRAVITY SEWER SERVICE LINES. 10. IF TOP OF TANK IS LESS THAN 3' DEEP, PLACE 2" RIGID INSULATION ON TOP OF SEPTIC TANK AND DOWN SIDES A MIN. 24': PLACE 2" RIGID INSULATION OVER 4" SEWER & EFFLUENT LINE FROM BUILDING TO SEPTIC TANK AND TO START OF DRAIN FIELD LATERALS UNLESS DEPTH OF COVER EXCEEDS 36 L.5452.94(FG) TECHNICAL BUILDING • 545,E 6 1-1/2 " SDR 11 PVC MANIFOLD LATERAL FLUSHING VALVE SEE DTL SHT C20.0 I��II I AUTOMATIC DISTRIBUTING VALVE ORENCO 4402 OR APPROVED EQUAL 12"DR a„S ba„Z1 ba«Z ba«Z O PUMP CONTROL PANEL • • - 4" INVERT OUT 5450.60 QUICK 4 STANDARD CHAMBERS IN INFILTRATION TRENCH. SEE DTL SHT C20.0 / / EL.5454.07( •S 1-1/2" SDR 11 PVC MAN/FOLD BOTTOM OF CHAMBER ELEV: 545a5 (TYP.) a„S END PIPE INSULATION WHEN COVER OVER PIPE IS >3.5' CP START PIPE INSULATION PER DTL SHT C20.0 WHEN COVER OVER PIPE <3.5' 1.5" 1-1/2" SDR 11 INSTALL PIPE © a25 o W/ 1.5"FM 1.5" L - - CJI G SEWER SERVICE CLEANOUT SEE DTL SHT C20.0 4" SDR 35 SEWER SERVICE 2.0%' (MIN) FORCE MAIN INBACf0 TANK 5"FM R/M:5452. 71 /NVT.• 448.70 G INVT OUT - 48.70-/ 2,500 GALLON SEPTIC TANK SEE DTL SHT C20.0 6"W G 6"W Graphic Scale 0 5 10 20 In Feet: 1" = 1" = 30" E 0 Q N ▪ D 0) t/) �? ;or) Q CN •- 00 EOM O LC) 30:; co c //D^ O V E (15 U- VJ Garfield County, Colorado FOR CONSTRUCTION Project Milestone: Job No. 2019-145.002 Drawn by: JS Date: 12.17.2019 Qoroved: JB PES: JS File: SB-GfldCo_OWTS Title: OWTS Plan Dwg No. C19.O Of : C14.0 l: \ 2019 2019-145—SpringBorn \ 002—Garfield H—Dwgs \ Civil \ PS—SheetSet SB—GfldCo_OWTS. dwg Plotted: 4/13/2020 7:41 PM By: Jenna Svoboda EXISTING DIRT OR TOPSOIL AREA VARIES .11 M/N. 3.5' TO TOP OF PIPE C Q L W CL Z O k SLOPE TRENCH WALLS FOR SAFETY PER CURRENT OSHA ONS/TE MATERIAL COMPACTED TO 95% STANDARD DENS/TY INSIDE ROADWAY COMPACTED TO 90% STANDARD DENS/TY OUTSIDE OF ROADWAY 4" THICK RIGID INSULATION ON TOP 2" THICK RIGID INSULATION VERTICALLY 4" GRAVITY SERVICE OR 1 i" FORCE MA/N CLASS 6 AGGREGATE BEDDING COMPACTED TO 95% STANDARD DENSITY 1) DIRT / TOPSOIL PLACEMENT SHALL MEET EXISTING THICKNESS AND KIND 2) MAINTAIN MIN. 2% SLOPE ON SEWER SERVICE GRAVITY LINE. DESIGN NOTES: • Design per performance test per ASTM C1227 • Top surface area 108.88 ft2 • f'c ® 28 days; concrete = 6,000 PSI Min. Installation: • Tank to be set on 5" min. sand bed or pea gravel • Tank to be backfilled uniformly on all sides in lifts less than 24" and mechanically compacted • Excavated material may be used for backfill, provided large stones are removed • Excavation should be dewatered and tank filled with water prior to being put in service for installation with water table less than 2' below grade • Meets C1644-06 for resilient connectors • Inlet and Outlet identified above pipe • Delivered complete with internal piping • Control Panel to be mounted in sight line of tank • TRUCK MUST BACK UP PERPENDICULAR TO LONG SIDE OF HOLE, LID IS A SECOND SET (NO EXCEPTIONS) • 4' Maximum bury depth FLEXIBLE BOOT TYPICAL TRENCH CROSS SECTION SCALE: N.T.S. 201" 20" CLEAR ACCESS 0 I —3O" CLEAR ACCESS RISERS TO GRADE (2' MAX) 5" WIRES TO PANEL TOP VIEW 24" MIN/MUM RISER HEIGHT (TYP.) a� .I, "Service contracts available for maiafenance " o BUTYL RUBBER SEALANT o PVC BAFFLE 196" PUMP REQUIREMENTS: SECTION VIEW • DESIGN FLOW RATE: 3OGMP • DESIGN TOTAL DYNAMIC HEAD: 50FT • COMPLETE INSTALLATION (WIRING, PANEL, MOUNTING AND START—UP PROCEDURES • COMPLETE WARRANTY • PROVIDE FOR DRAIN BACK INTO PUMP CHAMBER EFFLUENT FILTER • QUICK DISCONNECT BALL VALVE ALTERNATE DISCHARGE HEIGHT d' ORENCO 3005 DUPLEX PUMP IN PUMP VAULT, OR APPROVED EQUAL. SEE PUMP REQUIREMENTS THIS SHEET. Digging Specs Invert Dimensions Net Capacity Net Weight 19' Long x 8' Wide Inlet 56" Outlet 73"or54" Length Width Height Inlet Side Outlet Total Lid Tank Total 201" 78" 68" 2250 gal 1053 gal 2636 gal 6420 lbs 18200 lbs 24820 lbs 2,500 GALLON SEPTIC TANK SCALE: N.T.S. 8" VALVE BOX ONE AT END OF EACH LATERAL 1-1/4" PVC LATERAL FLUSHING VALVE AND CLEANOUT W/ SCREW ON CAP MOUND FOR PROPER DRAINAGE TOPSOIL_ , \` / — ESTABLISH VEGETATIVE COVER NATIVE BACKFILL 1-1/4" LATERAL W/ 1/8" ORIFICE IN 12 O'CLOCK POSITION SPACED 3' O.C. 4' MAXIMUM I- i NOTE: 1. LOCATE SEWER CLEANOUT AND/OR VERTICAL CHANGES IN DIRECTION. 2. ELEVATIONS MAY VARY DEPENDING ON SITE & GRADING. COORDINATE INSTALLATION W/ENGINEER. 4'0 PIPE FLOW 45' PVC WYE OR ELBOW UNCOMPACTED NATIVE SOIL 1-1/4" PVC LATERALS. ORIFICE HOLES ORIENTED UP WITH 4 " LATERAL DRAIN HOLES AT EACH END AND AT MID POINTS. (TYP. ALL LATERALS) LATERAL FLUSHING AND OBSERVATION PORT DETAIL NOT TO SCALE PLUG: PVC IN LANDSCAPING, BRASS IN PAVED AREAS OR CONCRETE SLABS 45' PVC ELBOW CLEAN—OUT (CO) DETAIL SCALE: N.T.S. 4'0 PIPE FLOW SECTION VIEW 11,11 11 -III "1 QUlCK4 STANDARD INFIL TRA TOR TRENCH DETAIL NOT TO SCALE TOP VIEW 12" i UNCOMPACTED NATIVE SOILS SIDE VIEW SIDE VIEW INFIL TRA TOR SYSTEMS QUICK4 STANDARD CHAMBER OR EQUAL NOT TO SCALE E O Q N• D 0) (/) N cY) Q CV 3 s 00 EOM O LC) C 3"ct co O OHO E (15U- VJ Garfield County, Colorado Th a) as 0 0 C O .0 a) Addendum /3 FOR CONSTRUCTION Project Milestone: Job No. 2019-145.002 Drawn by: JS Date: 12.17.2019 Qoroved: JB PES: JS File: SB-GfldCo_OWTS Title: OWTS Details Dwg No. C20.0 Of : C14.0