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HomeMy WebLinkAboutSite PlanACCESS EASEMENT 20' WIDE BOOK 905 PAGE 347 REC 4464338 LECTRIC ASSOCIATION, INC M MID CONTINENT COAL AND COKE CO. 550 PAGE 454AS EEC e304903 a LESS EASEMENT BENEFITING 4D THE NIESIANIK PROPERTIES Na 89115 EXISTING ROADWAY COVERED BY EASEMENT REC. NO. 237727 (BOOK 383 PAGE 558) STORAGE UNIT 20' UTILITY EASEMENT EXCHANGE AGREEMENT REC. NO. 891195 CENTERED OVER EXISTING WATERLINE SERVICING IRMW PARCEL 1B 30' HOLY CROSS EASEMENT REC. NO. 889895 POSITIONED OVER EXISTING OVERHEAD LINE 4" SOLID PVC GRAVITY DISTRIBUTION PIPES (TYP.) TO ABSORPTION FEILD STORK UNIT 2 U 000 20 DISTRIBUTION BOX LID AT GROUND SURFACE WAREHOUSE/SHO F.F.= 6214+/- MIN. 1/2 BATH PER UNI 0 10 RISER SECTION BAFFLE 4" DISTRIBUTION GRAVITY LINE FROM SEPTIC TANK `INVERT IN 8" AGREGATE BASE COURSE COMPACTED SUBGRADE DISTRIBUTION BOX DETAIL N.T.S. FA 2" A , 4 EMPLO STORAGE UNIT 4 ITY STRUCTURE E EXIST. GRADE ES GRAPHIC SCALE 20 40 ( IN FEET ) 1 inch = 20 ft. PROPOSED 4" 2-WAY CLEANOUT 4" PVC GRAVITY SEWER PIPE. 2% SLOPE±, BED & BACKFILL W/ CLASS-6 80 OWTS DESIGN PLAN CONCRETE DISTRIBUTION BOX WITH BAFFLE INSTALLED LEVEL ON COMPACTED B INSTALL RISERS AND LID TO SURFACE 4" PVC DISTRIBUTION PIPES, INSTALL INTO UPPER SIDE WALL PENETRATION OF END CAP (TYP.) EXCAVATION DEPTH APPROX, 3' BELOW EXISTING GRADE CONNECT INDIVIDUAL 4" DISTRIBUTION PIPE TO HEAD OF EACH CHAMBER TRENCH (TYPICAL EACH TRENCH). INSTALL CONNECTION AS NEEDED FROM END OR SIDE INLET PORT OF EACH INFILTRATOR CHAMBER END CAP. CHAMBER END CAP CHAMBER END CAP CONNECTION DETAIL N.T.S. INSTALL A 2-COMPARTMENT 1000-GALLON CONCRETE SEPTIC TANK (USE VALLEY PRECAST ITEM-1000T-2CP-EF OR EQUAL) INSTALL INLET SANITARY TEE & OUTLET EFFLUENT FILTER ASSEMBLY. INSTALL WITH (2) 24" DIA. BY 24" DEEP CONCRETE RISERS WITH LIDS. TOP OF RISERS/LIDS TO BE INSTALLED @ + 3" ABOVE FINISH GRADE. 4" PVC EFFLUENT PIPE @ MIN. 1%, USE SCHD-40 OR SDR-26 BED & BACKFILL W/ CLASS-6 TOP PERIMETER OF FIELD SURFACE TO BE MOUNDED 6" ABOVE SURFACE GRADES INSTALL 4" RISER PIPE INSPECTION PORT EXTEND RISER W/ THREADED CAP MIN. 12" ABOVE FINISH GRADE (TYP. EACH CHAMBER END CAP) INSTALL CHAMBER END CAP ON ALL END CHAMBERS PROTECT OWTS FIELD AREA FROM VEHICULAR TRAFFIC OR ANY DISTURBANCE BY PLACEMENT OF CONCRETE BARRIERS OR BOLLARDS ABSORPTION/TREATMENT FIELD USE 20 QUICK-4 CHAMBERS IN 2 TRENCHES WITH 10 CHAMBERS PER TRENCH FOR A TOTAL ABSORPTION AREA OF 240 S.F. THE SYSTEM SHALL BE PLUMBED FOR ABSORPTION/TREATMENT FIELD INSTALLATION NOTE: 1. THE BOTTOM OF EACH TRENCH TO BE EXCAVATED TO A MAXIMUM DEPTH OF 36-INCHES BELOW THE EXISTING SURFACE GRADES, WITHIN THE NATIVE SANDY SILT LOAM SOILS. THE TRENCHES SHALL BE EXCAVATED TO THE SPECIFIED DEPTH WITH THE BOTTOM ABSORPTIVE SURFACE SCARIFIED BY A FINAL PASS OF THE EXCAVATOR BUCKET TEETH. 2. THE CHAMBERS SHALL BE INSTALLED ON LEVEL GRADE IN EACH TRENCH. THE INSTALLED CHAMBERS & END CAPS SHALL BE COVERED WITH NON -WOVEN FILTER FABRIC & BACKFILLED WITH A MINIMUM 12-INCHES OF COVER OVER THE TOP OF THE CHAMBERS. 3. THE FINISH GRADE ACROSS THE FIELD SHALL BE SLIGHTLY MOUNDED ABOVE EXISTING ADJACENT GRADES A MINIMUM 12-INCHES ALONG THE CENTER OF THE FIELD & A MINIMUM 6-INCHES AROUND THE PERIMETER ABOVE EXISTING GRADES. 4. IF LARGE COBBLES OR BOULDERS ARE ENCOUNTERED IN ANY PORTION OF THE EXCAVATIONS, OVER EXCAVATE AS NEEDED AND BACKFILL WITH ASTM-33 (CONCRETE SAND) TO THE BOTTOM OF TRENCH ABSORPTIVE SURFACE GRADE. 5. INSTALL 4" PVC RISER PIPE INSPECTION PORT AT EACH CHAMBER END CAP. FOR QUICK-4 CHAMBERS, INSTALL 4" PIPE RISER IN ONE OF THE PAIRED END CAP TOP PENETRATION CUT OUTS OR FOR BIODIFFUSER INSTALL 4" PIPE RISER IN THE TOP PENETRATION CUT OUT ON EACH END CHAMBER. EXTEND RISER W/ THREADED CAP MIN. 12" ABOVE FINISH GRADE. INSTALL FITTING AND/OR SCREWS TO HOLD BOTTOM OF RISER MIN. 9" ABOVE INFILTRATIVE SURFACE (TYP.EACH CHAMBER ROW END CAP) 6. ENGINEER TO INSPECT EXCAVATION AT TIME OF CONSTRUCTION TO VERIFY SOIL CONDITIONS & LAYOUT OF TRENCHES. ALL WORK TO BE APPROVED BY THE ENGINEER PRIOR TO BACKFILL OF TANK, PIPING AND CHAMBERS. 6" MIN. 1-1 4" MIN. NATIVE, YARD OR LANDSCAPED SURFACE EXCAVATED MATERIAL COMPACTED ��/� i\/i4' { 4" 1-•-- TO 90% STANDARD PROCTOR SUITABLE BACKFILL OR CLASS 6 ROAD BASE COMPACTED SUBGRADE TRENCH CROSS-SECTION FOR SDR-35,26 OR SCHD-40 PIPES N.T.S. Design Calculations OWTS The design flow is calculated as follows for low useage commercial facility onsite wastewater treatment system (OWTS) From the Regulation 43 usage Table 6-2 : Max. Design flow (Qd) = # of people x (avg.per capita and/or per base fixture flow-GPD) Each unit has } bath with single water closet (24.8 gpd) and Lavatory (8.4 gpd) Qd1=Base fixture load = (24.8 gpd + 8.4 gpd)=33.2 gpd x 4 units = 33.2 x 132.8 gpd; Qd2= Assume 1 additional daily worker per unit: 1 persons @ 15 gpd = 4 x 15 = 60 gpd; Qd=Qd1 + Qd2 = 132.8 + 60 = 192.8 gpd Total Design flow Qd = 200 gpd Septic Tank Design: Use a 1000 gallon, two compartment concrete septic tank with an effluent filter outlet sanitary tee in the second chamber. Tank shall be installed with sealed concrete risers and lids to the finish grade surface. Sub Surface Conditions and Testing: Subsurface soil investigations and USDA soil texture method tests were performed by Sopris Engineering in May, 2018. The soils in the area of the proposed absorption field were sampled and characterized by application of the USDA soil texture method analysis. The soils were tested to determine the hydraulic loading rate and to confirm the appropriate absorptive surface suitable for conventional absorption systems in native soils. A shallow and deep excavated pit was observed in the Easterly portion of the site adjacent to the proposed field location. The soils below 4 to 9 inches of mixed surface fill & topsoil consist of medium dense sandy silt loam with moderate granular to slightly blocky structure with some cobbles and gravels. The percentage of cobbles and graves: below 24 inches was less than 20% in the sandy silt loam to the 7 foot depth explored. The soil appears to be consistent across the site the easterly side of the relatively flat development envelope. The native soils sampled from 2-3 feet below the surface are characterized as a soil type 2 consisting of silt loam texture with moderate granular structure. This soil has an effective loading rate for conventional soil treatment of 0.60 gal/S.F./day for a level 1 conventional treatment system. The equivalent percolation rate is assumed to be approximately 16-25 minutes per inch. No free water was encountered in the excavations on site. Groundwater levels are expected to be well below 10 feet from the existing surface grades. The soils appear suitable for a conventional shallow absorption field consisting of gravelless infiltration chamber units. Treatment -Soil Treatment Unit/Absorption System Design: The treatment/absorption field is designed based on utilizing the effective Long Term Acceptance Rate (LTAR) for the native soils and the application of appropriate loading factors for a soil treatment unit system utilizing gravity distribution to gravelless chamber trenches. The new treatment system and absorption field will consist of gravity distribution of septic tank effluent via a distribution box to individual chamber trenches with treatment across the scarified native soil absorptive surface. Long Term Acceptance Rate (LTAR) Wastewater Treatment Level 1; loading rate for silt loam is (0.60 gal./S.F./day) for soil type 2.; Loading factors; (Table 10-2, Gravity application trenches = 1.0) and (Table 10-3, gravelless chambers = 0.7) A(sf) = Qd .: A = Area; LTAR LTAR = 0.60 Gal/S.F./day for silt loam Qd = flow (gal/day) = 200 gpd L.F.1=1.0 Gravity Distribution L.F.2=0.7 Chambers A(sf) = 200 gpd x 1.0 x 0.7 = 233 S.F. 0.60 Gal/S.F./day Number of quick-4 chambers: 233 S.F = 19.4 chambers, Use 20 Quick-4 Infiltrator or 18 Biodiffuser chambers 12 S.F./Chamber Use 20 Quick-4 Infiltrator chambers in two trenches 42' long by 3' wide with two end caps as delineated on the plan. The septic tank effluent will be gravity discharge to a distribution box with two 4" distribution pipe routed to the head of each chamber row from the D-box. 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UNDISTURBED EARTH SILTY OF 3" LOAM SOIL. NOTE: ALL CHAMBERS IN EACH TRENCH MUST BE INSTALLED ON LEVEL GRADE OVER 3" ASTM-33 FILTER SAND LEVELING COURSE. MAXIMUM DEPTH OF TRENCHES NOT TO EXCEED 36" BELOW PROPOSED SURFACE GRADES. INLET AND END CAPS ARE TO BE INSTALLED ON EACH END CHAMBER ROW. IF EXCESSIVE LARGE COBBLES OR BOULDERS ARE ENCOUNTERED IN ANY PART OF THE EXCAVATION, OVER EXCVATE AND BACKFILL WITH SAND OR SUITABLE SCREENED NATIVE SOILS. 4" PVC INLET PORT IN END CAP 6' MIN 12" 36" CHAMBER TRENCH CROSS SECTION DETAIL N.T.S. GENERAL NOTES: 1. THE OWTS AS SHOWN ON THE PLAN AND THE DETAILS WERE DESIGNED BY SOPRIS ENGINEERING. 2. THE EXISTING/ PROPOSED LOT CONDITIONS AND SURVEY/PLAT INFORMATION SHOWN BY SOPRIS ENGINEERING. 3. PRIMARY OWNER NAME AND ADDRESS: T & T LLC, PO BOX 1252, CARBONDALE CO 81623 4. SITE ADDRESS: 0 544 COUNTY RD 100, CARBONDALE, CO 81623 5. Legal Summary: Quarter: SE Section: 35 Township: 7 Range: 88 Subdivision: IRMW LLC' PARCEL 1 Lot: 1B AS PER KMINOR SUBDIVISION PLAT RECEPTION NUMBER 893462. 6. Parcel Number: 2393-353-02-002 7. GARFIELD COUNTY SEPTIC PERMIT #: ISSUED 8. 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 LINES TO BE SDR-35 OR SCHEDULE 40 P.V.C. PIPE UNLESS NOTED OTHERWISE. 4. INSTALL A TWO-WAY CLEAN OUT ON THE SERVICE LINE FROM THE HOUSE AND AN ADDITIONAL CLEANOUT WITHIN 100' SECTION OF EFFLUENT DISCHARGE PIPE . 5. THE SEPTIC TANK SHALL BE INSTALLED LEVEL ON COMPACTED EARTH. INSTALL WATERTIGHT RISERS AS NECESSARY TO BRING ALL REQUIRED ACCESS POINTS TO THE FINISHED SURFACE GRADE. BACKFILL WITH SUITABLE NATIVE SOIL FREE OF BOULDER AND ROCK IN EXCESS OF 3" DIAMETER. 6. A SANITARY BAFFLE TEE IS REQUIRED ON THE SEPTIC TANK INLET AND OUTLET. INSTALL THE INLET AND OUTLET TEES PLUMB AND IN A POSITION TO ALLOW EASY INSPECTION AND MAINTENANCE OF TANK FROM THE TANK RISERS. 7. INSTALL A 4" EFFLUENT FILTER ON THE 4" OUTLET TEE OF THE SEPTIC TANK. THE FILTER SHOULD BE INSPECTED EVERY SIX MONTHS. THE EFFLUENT FILTER SHALL BE MAINTAINED AND CLEANED WHEN THE TANK IS PERIODICALLY PUMPED OR AS NECESSARY. INSTALL A SUITABLE EXTENSION ON THE FILTER WITH A HANDLE TO BE WITHIN 6" BELOW THE ACCESS LID. 8. THE CONTRACTOR SHALL ENSURE THAT THE SEWER LINES, SEPTIC TANK AND RISERS ARE WATERTIGHT. ALL PLUMBING FIXTURES AND OWTS COMPONENTS SHALL BE INSTALLED AND MAINTAINED TO AVOID SURFACE OR GROUNDWATER FROM ENTERING THE SYSTEM AND TO PREVENT LEAKAGE FROM THE SYSTEM. IN-HOUSE PLUMBING FIXTURES SHALL BE MAINTAINED TO PREVENT EXCESS WATER FROM ENTERING THE SEPTIC SYSTEM. 9. THE DIMENSIONS AND NOTES SHOWN ON THE PLAN INDICATE MINIMUM AREA, LENGTH, WIDTHS AND SEPARATION DISTANCES FOR THE TRENCHES, BED OR MOUNDED ABSORPTION FIELD. 10. THE ABSORPTION TRENCHES SHALL BE EXCAVATED TO LEVEL GRADE IN NATIVE EARTH. THE TRENCH BOTTOM AND SIDEWALLS SHALL BE SCARIFIED AND/OR RACKED IF SMEARING OCCURS. IF 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 SAND. 11. THE LEACHING CHAMBERS SHALL BE INSTALLED LEVEL WITH A MINIMUM COVER OF 10 INCHES NOT TO EXCEED 24 INCHES. 12. LEACHING CHAMBERS WILL BE PLACED IN THE EXCAVATION OVER THE NATIVE SOIL OR SELECT SOIL REPLACEMENT OR ASTM-33 SAND LEVELING COURSE. END CAPS SHALL BE INSTALLED ON THE END CHAMBERS IN EACH TRENCH. 13. VERTICAL INSPECTION PORTS SHALL BE INSTALLED FROM THE PRE MARKED HOLE ON THE TOP OF EACH END CHAMBER CAP . (TYP. BOTH ENDS OF EACH ROW) THE PORTS MAY HAVE THREADED CAPS AT GRADE. 14. THE CHAMBERS WILL BE BACKFILLED WITH EXCAVATED MATERIAL VOID OF ROCKS, THE BACKFILL MATERIAL SHALL NOT EXCEED 2 1/2" DIAMETER AND SHALL BE PLACED TO AT LEAST 6 INCHES ABOVE THE TOP OF THE CHAMBERS. THE TOP OF THE PLACED BACKFILL SHALL BE COVERED WITH A LAYER OF FILTER FABRIC. A MINIMUM 4" DEPTH OF TOPSOIL IS TO BE PLACED ABOVE THE BACKFILL TO THE SURFACE & RE VEGETATED. 15. INSTALLATION OF LEACHING CHAMBERS SHALL BE IN CONFORMANCE WITH THE MANUFACTURES INSTALLATION INSTRUCTIONS. 16. THE ABSORPTION TRENCHES/BED OR MOUND MUST BE GENERALLY MARKED AT THE FOUR CORNERS WITH INSPECTION PORTS AND/OR BURIED REBAR. THE FIELDS MUST BE PROTECTED FROM VEHICULAR AND LIVESTOCK TRAFFIC. 17. THE ABSORPTION FIELD SURFACES MUST BE SLOPED OR SLIGHTLY MOUNDED TO DIVERT SURFACE DRAINAGE AWAY FROM THE FIELD. 18. THE ENTIRE ABSORPTION FIELD SURFACE MUST BE RE VEGETATED. 19. 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. 50 feet from any stream or water course. DISTRIBUTION SYSTEM NOTES: 1. AN EFFLUENT FILTER SHALL BE INSTALLED IN THE DISCHARGE TEE IN THE SECONDARY COMPARTMENT OF THE SEPTIC TANK. WE RECOMMEND THE INSTALLATION OF AN ORENCO SYSTEMS 4" EFFLUENT FILTER FILTERED EFFLUENT TAHT WILL DISCHARGE TO A CONCRETE DISTRIBUTION BOX WITH RISERS AND LID AT THE SURFACE. 2. THE DISTRIBUTION SYSTEM WILL BE INSTALLED TO ALLOW FOR EFFLUENT TO BE EQUALLY DISTRIBUTED TO THE ABSORPTION TRENCHES VIA INDIVIDUAL 4" DISTRIBUTION LINES CONNECTED TO THE HEAD OF EACH CHAMBER TRENCH. 3. THE MINIMUM SLOPE OF THE DISCHARGE LINE FROM THE TANK TO THE DISTRIBUTION BOX SHALL SHALL BE INSTALLED AT A MINIMUM 1% SLOPE. THE INDIVIDUAL DISTRIBUTION LINES AT THE HEAD OF THE TRENCHES SHALL BE INSTALLED AT A MINIMUM OF 2% SLOPE. TESTING, INSPECTIONS AND CONSTRUCTION MANAGEMENT: 1. ADDITIONAL GEOTECHNICAL EVALUATIONS AND INSPECTIONS BY THE ENGINEER SHOULD BE PERFORMED DURING INITIAL STAGES OF CONSTRUCTION TO VERIFY SOIL CONDITIONS AND OWTS DESIGN. 2. THE EVALUATIONS AND INSPECTIONS MAY RESULT IN MODIFICATIONS TO THE DESIGN THAT MAY INCLUDE FIELD SIZE REVISIONS AND POSSIBLE SOIL REPLACEMENT IN SELECT AREAS IF NEEDED. SUFFICIENT NOTICE TO THE ENGINEER BY THE PROJECT MANAGER/CONTRACTOR NEEDS TO BE MADE IN ORDER TO SCHEDULE THE SITE INSPECTIONS. 3. 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. 4. COUNTY REGULATIONS REQUIRE THAT THE DESIGN ENGINEERS OF RECORD PERFORM SITE INSPECTIONS OF THE PERMITTED SYSTEM DURING CONSTRUCTION AND PROVIDE "AS -BUILT" DOCUMENTATION OF THE INSTALLED SYSTEM TO THE COUNTY AFTER CONSTRUCTION IS COMPLETE. THE ENGINEER SHOULD BE CONTACTED AND NOTIFIED OF THE CONSTRUCTION SCHEDULE. 5. OUR DESIGN AND RECOMMENDATIONS ARE BASED OUR SITE ASSESSMENT, SOIL EVALUATION AND UPON INFORMATION SUPPLIED TO US BY OTHERS. IF SUBSURFACE 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. IF THE COUNTY REQUESTS CHANGES OR MODIFICATIONS TO THIS DESIGN, WE SHOULD BE CONTACTED TO EVALUATE AND RESPOND TO THE REQUEST. 6. CONTRACTOR SHOULD REVIEW ANY CONDITIONS ON THE ISSUED PERMIT AND COORDINATE WITH THE ENGINEER REGARDING CONSTRUCTION OF THE SYSTEM. 7. IF YOU HAVE ANY QUESTION OR NEED ANY ADDITIONAL INFORMATION, PLEASE CALL PAUL RUTLEDGE AT SOPRIS ENGINEERING, 704 0311. w 0 m 0 w 0 0 rn w 0 0 m 0 w 0 U w 0 U S OPRIS ENGINEERING, 0 Z 0 0 c:A2016V16094VCIVJLVC4vdt DWGsVDEV-76094-DE-Owns. dwg F- J_ U LL rLU V 0 t co 0 re -is LU CC 0 W 0 0 LLI CC O U 1- W Z J Z Q W 0 LT Oct Cr l C CC U 0 0 Q J IZ w 0) f- tu I- Z w 0 w ▪ C) U Lw co j Z 0 co w O w 0 DATE: April 7, 2018 JOB NO. 111747.01 SHEET Cl