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HomeMy WebLinkAboutOWTS DesignN yr AftE \ a%0 A .L l0 U r 0 a \1 \ \ oA \\ \ ' \ \ CONSTRUCTION SPECIFICATIONS 1. Topsoil shall be stripped, stockpiled and replaced over all disturbed areas. Existing w C Y \ ® trees and shrubs shall remain unless otherwise approved by the Owner; existing � = n v \ vegetation shall not be disturbed beyond the necessary limits of the construction. E o \ \ \ V A 2. All disturbed areas shall be revegetated by the Owner. p 3. The site shall be graded so that runoff water does not drain onto the leach field 0 0 \ V A v` Know what's below. 4. Cao struction shall conform to Garfield County Regulations. � d \ ` Call before you dig. 5. Chris Hale, Mountain Cross Engineering, Inc. shall be notified of the construction \ c� U) \� V progress so the system may be inspected. Do not backfill over any system components y v until they have been inspected. E a) \ � \ \ \\N6. Sewer piping shall be bedded and initially backfilled with gravel 4 inches under piping W m ` A \ �` �� and 6 inches on top of piping. Backfill shall be wheel -roll compacted. Piping shall be 0 > a,N-1` \ installed watertight and to prevent freezing. > a IN N\ \\ +0 s 0 10 7. The septic tank shall be precast concrete, set level on a bed of gravel. Install the � W r- 4 IN \ tank in accordance with the manufacturer's recommendations. (� L 'n \ _ v -\ \ \ `" r \ SCALE: 1 10 8. The septic tank capacity must be at least the size specified. ® � v \ \ 9. The septic tank inlet must be at least 3 inches higher than the outlet. b inlet tee e R N 6 ` \ `, \ �., \ \ \ baffle must extend above the surface of the liquid to within 1 inch of the bottom of the � r � \ \ tank top and must extend at least 14 inches below the inlet. W a n \ \ ` 01 10. A filter is required on the final outlet tee or at some point between the septic tank V 00 rx \ `` and absorption field so that only the liquid effluent will be discharged. Other outlet tees o 154 1\ \ or baffles must extend above the surface of the liquid to within one inch of the IN � underside of the tank top. Tees must extend at least 14 inches below the outlet. 11. The distance from the septic tank outlet to the underside of the tank top must be \ \ at least 10 inches. ` , ` _ 12. Liquid depth must be at least 30 inches and must not exceed the septic tank length ' N, or 60 inches, whichever is less, NI � compartment t b t least �, �, 13 Aseptic tank must have two or more compartments or more than one tank in 1. \ ` \ series to provide the necessary capacity). The first compo men mus e a eas as �-� � �' �`� V '� large as the second compartment. s� ti \ 14. The transfer of liquid from the first compartment to the second or successive y \ � \ compartment must be made at a liquid depth of at least 14 inches below the outlet ` invert, but not in the sludge zone \ \ ` 15. At least one access no less than 20 inches across must be provided in each compartment of a tank. V A 16. The opening cover of a septic tank, inspection port, or sampling access port must Q IN, \be marked and must be no more than 8 inches below the finished grade. It must be woo made of materials resistant to degradation from moisture or sewer gases. U) �. g ` . \ \ 17. Pipe meeting or exceeding ASTM standard 3034 properly supported to prevent failure - 7�S y A `-by settling must extend from the septic tank at leasfive (5) feet from the inlet and ^� W V \ ` \ 18.A ends. wastewater Ines ed us be constructed of compatible pipe, bonding agent, outlet \ 18 IIi used must N, ®.� "N, ., and fittings. The following may be used: plastic pipe and fittings with a minimum wall J` 4thickness of ASTM Standard 3034, SDR35, or equivalent, perforated distribution pipe o o,� surrounded by rock within a soil absorption system with a minimum wall thickness \ / / A_uQ "ems a° \ ` conforming to ASTM Standard 2729; or corrugated polyethylene pipe with smooth interior / F0 i �_ VN, meeting ASTM F405 and AASHTO M252 specifications or equivalent. Tile, open -joint pipe, \ .and cast iron pipe may not be used in OWTS's. \ / fa 019. All components, work, equipment, and material must be designed, operated and / / \ p Q \ maintained so as to comply with the minimum requirements of the applicable and current /•• / / \ a CLEANOUT AND TIE TO 4 PVC o \ Plumbing, Electrical, Building or other code in force on the date of the OWTS Permit N `v v / / SEWER PIPE FROM RESIDENCE �� `N \ Application. Q% / ti (INTERIOR PLUMBING BY OTHERS), \ 20. Major components not constructed on the site where installed must have a L ca permanent plate or other indelible marking, easilyread and visible, for the purpose of inspection, to include name of manufacturer, mod el or serial number designation, and low $x maximum design capacity of the unit. .21. Gravel shall be clean, screened rock ��" to 2-�,�" in size. /�Y 1�+ 22. Tanks, treatment units, and piping material must be watertight and must be certified W by the Water Quality Control Division of the Colorado Department of Public Health and }� o �- � \ � `" Environment. Under certain circumstances, the Department may require the tank be filled ICU 4" PVC SEWER PIPE `.. with water prior to backfill to check for leaks. \ `> INV=6719.0 ® 87. FITTINGS AND \ 23. The ground over any part of the OWTS must be restricted to activity or use that will BENDS AS NEEDED \ \ allow the system to function as designed and that will not contribute to compaction of �y the soil or to the structural loading detrimental to the capability of the component to function as designed. Driveways, parking areas, storage buildings, large animal confinement areas and other similar uses may not be placed on or above an OWTS v/ _disposal field. ' \ F'Qa 0..1 - \ �� 24. Machine tamping, rolling, or hydraulic compaction of final cover is not permitted, \ \ ore cod however, hand tamping may be allowed where necessary to stabilize the soil to prevent \ \ erosion or the intrusion of extraneous water. i F'a � " INV --6714.5 '.. :� "-N 'I +` v INV=6711.75Cn \ AN, _ X.,4" PV PIPE` o // �..C SEWER � ®2% FITTINGS AND �,\ oINSTALL SEPTIC/DOSING BENDS AS NEEDED A `� TANK, SEE DETAILS \ \ i INV=6711.45 ` \ TALL DISTRIBUTION + ;a DETAILS \ \ .INS 0 FO � B v X, SEE ~ \, Po/ � :. �- �� �- INV=6710.95 � \ PN6 �cfi1�� ti tl ©ESTIMATED , TEST HOLE3596 LOCATIONS " PVC SEWER PIPE 0 v \ \ 2% MIN. FITTINGS AND \... !,P + \ F INv=8709.5 V BENDS AS NEEDED fA 1 SEPTIC/DOSING TANK SETBACKS: '- X6715 \. ` \ \ °a4w \ 5' FROM DWELLING OCCUPIED BUILDING 10' FROM WATER LINE ` 10' FROM PROPERTY LINE r ' WV=6706.5 \ NI \ + \ 10' FROM LINED DITCH \ \ \ fw `IN IN 10' FROM TOP OF BANK ' \ U) \ o� 50' FROM WELL z y \ LL1 \ \ - o INV -8707.5 ` > o C) \ - Ld , INV=6 09.5 LdE i V INV=6707.0 v ` + LEACH FIELD SETBACKS: - - o n 100' FROM WELL l 25' FROM WATER LINE - _ DATE \ �1 20' FROM DWELLING OCCUPIED BUILDING 10' FROM PROPERTY LINE INv=8708.5 07/29/21 1l + SCALE 10' FROM LINED WATER BODY v 5' FROM SEPTIC TANK1 "=1 0, C\2, � � I � a � _- - -- � � y ENGINEER INV=6707.5- v. C HALE DWG FILE C oodstelnDrive INSTALL LEACH _ A ` r r' r ,r e FIELD, SEE DETAILS JOB 517-019 ti INV=6707.0 ' SHEET \ s = \ IN 4 1 � T 1 1 i N yr AftE \ a%0 A .L l0 U r 0 a \1 \ \ oA \\ \ ' \ \ CONSTRUCTION SPECIFICATIONS 1. Topsoil shall be stripped, stockpiled and replaced over all disturbed areas. Existing w C Y \ ® trees and shrubs shall remain unless otherwise approved by the Owner; existing � = n v \ vegetation shall not be disturbed beyond the necessary limits of the construction. E o \ \ \ V A 2. All disturbed areas shall be revegetated by the Owner. p 3. The site shall be graded so that runoff water does not drain onto the leach field 0 0 \ V A v` Know what's below. 4. Cao struction shall conform to Garfield County Regulations. � d \ ` Call before you dig. 5. Chris Hale, Mountain Cross Engineering, Inc. shall be notified of the construction \ c� U) \� V progress so the system may be inspected. Do not backfill over any system components y v until they have been inspected. E a) \ � \ \ \\N6. Sewer piping shall be bedded and initially backfilled with gravel 4 inches under piping W m ` A \ �` �� and 6 inches on top of piping. Backfill shall be wheel -roll compacted. Piping shall be 0 > a,N-1` \ installed watertight and to prevent freezing. > a IN N\ \\ +0 s 0 10 7. The septic tank shall be precast concrete, set level on a bed of gravel. Install the � W r- 4 IN \ tank in accordance with the manufacturer's recommendations. (� L 'n \ _ v -\ \ \ `" r \ SCALE: 1 10 8. The septic tank capacity must be at least the size specified. ® � v \ \ 9. The septic tank inlet must be at least 3 inches higher than the outlet. b inlet tee e R N 6 ` \ `, \ �., \ \ \ baffle must extend above the surface of the liquid to within 1 inch of the bottom of the � r � \ \ tank top and must extend at least 14 inches below the inlet. W a n \ \ ` 01 10. A filter is required on the final outlet tee or at some point between the septic tank V 00 rx \ `` and absorption field so that only the liquid effluent will be discharged. Other outlet tees o 154 1\ \ or baffles must extend above the surface of the liquid to within one inch of the IN � underside of the tank top. Tees must extend at least 14 inches below the outlet. 11. The distance from the septic tank outlet to the underside of the tank top must be \ \ at least 10 inches. ` , ` _ 12. Liquid depth must be at least 30 inches and must not exceed the septic tank length ' N, or 60 inches, whichever is less, NI � compartment t b t least �, �, 13 Aseptic tank must have two or more compartments or more than one tank in 1. \ ` \ series to provide the necessary capacity). The first compo men mus e a eas as �-� � �' �`� V '� large as the second compartment. s� ti \ 14. The transfer of liquid from the first compartment to the second or successive y \ � \ compartment must be made at a liquid depth of at least 14 inches below the outlet ` invert, but not in the sludge zone \ \ ` 15. At least one access no less than 20 inches across must be provided in each compartment of a tank. V A 16. The opening cover of a septic tank, inspection port, or sampling access port must Q IN, \be marked and must be no more than 8 inches below the finished grade. It must be woo made of materials resistant to degradation from moisture or sewer gases. U) �. g ` . \ \ 17. Pipe meeting or exceeding ASTM standard 3034 properly supported to prevent failure - 7�S y A `-by settling must extend from the septic tank at leasfive (5) feet from the inlet and ^� W V \ ` \ 18.A ends. wastewater Ines ed us be constructed of compatible pipe, bonding agent, outlet \ 18 IIi used must N, ®.� "N, ., and fittings. The following may be used: plastic pipe and fittings with a minimum wall J` 4thickness of ASTM Standard 3034, SDR35, or equivalent, perforated distribution pipe o o,� surrounded by rock within a soil absorption system with a minimum wall thickness \ / / A_uQ "ems a° \ ` conforming to ASTM Standard 2729; or corrugated polyethylene pipe with smooth interior / F0 i �_ VN, meeting ASTM F405 and AASHTO M252 specifications or equivalent. Tile, open -joint pipe, \ .and cast iron pipe may not be used in OWTS's. \ / fa 019. All components, work, equipment, and material must be designed, operated and / / \ p Q \ maintained so as to comply with the minimum requirements of the applicable and current /•• / / \ a CLEANOUT AND TIE TO 4 PVC o \ Plumbing, Electrical, Building or other code in force on the date of the OWTS Permit N `v v / / SEWER PIPE FROM RESIDENCE �� `N \ Application. Q% / ti (INTERIOR PLUMBING BY OTHERS), \ 20. Major components not constructed on the site where installed must have a L ca permanent plate or other indelible marking, easilyread and visible, for the purpose of inspection, to include name of manufacturer, mod el or serial number designation, and low $x maximum design capacity of the unit. .21. Gravel shall be clean, screened rock ��" to 2-�,�" in size. /�Y 1�+ 22. Tanks, treatment units, and piping material must be watertight and must be certified W by the Water Quality Control Division of the Colorado Department of Public Health and }� o �- � \ � `" Environment. Under certain circumstances, the Department may require the tank be filled ICU 4" PVC SEWER PIPE `.. with water prior to backfill to check for leaks. \ `> INV=6719.0 ® 87. FITTINGS AND \ 23. The ground over any part of the OWTS must be restricted to activity or use that will BENDS AS NEEDED \ \ allow the system to function as designed and that will not contribute to compaction of �y the soil or to the structural loading detrimental to the capability of the component to function as designed. Driveways, parking areas, storage buildings, large animal confinement areas and other similar uses may not be placed on or above an OWTS v/ _disposal field. ' \ F'Qa 0..1 - \ �� 24. Machine tamping, rolling, or hydraulic compaction of final cover is not permitted, \ \ ore cod however, hand tamping may be allowed where necessary to stabilize the soil to prevent \ \ erosion or the intrusion of extraneous water. i F'a � " INV --6714.5 '.. :� "-N 'I +` v INV=6711.75Cn \ AN, _ X.,4" PV PIPE` o // �..C SEWER � ®2% FITTINGS AND �,\ oINSTALL SEPTIC/DOSING BENDS AS NEEDED A `� TANK, SEE DETAILS \ \ i INV=6711.45 ` \ TALL DISTRIBUTION + ;a DETAILS \ \ .INS 0 FO � B v X, SEE ~ \, Po/ � :. �- �� �- INV=6710.95 � \ PN6 �cfi1�� ti tl ©ESTIMATED , TEST HOLE3596 LOCATIONS " PVC SEWER PIPE 0 v \ \ 2% MIN. FITTINGS AND \... !,P + \ F INv=8709.5 V BENDS AS NEEDED fA 1 SEPTIC/DOSING TANK SETBACKS: '- X6715 \. ` \ \ °a4w \ 5' FROM DWELLING OCCUPIED BUILDING 10' FROM WATER LINE ` 10' FROM PROPERTY LINE r ' WV=6706.5 \ NI \ + \ 10' FROM LINED DITCH \ \ \ fw `IN IN 10' FROM TOP OF BANK ' \ U) \ o� 50' FROM WELL z y \ LL1 \ \ - o INV -8707.5 ` > o C) \ - Ld , INV=6 09.5 LdE i V INV=6707.0 v ` + LEACH FIELD SETBACKS: - - o n 100' FROM WELL l 25' FROM WATER LINE - _ DATE \ �1 20' FROM DWELLING OCCUPIED BUILDING 10' FROM PROPERTY LINE INv=8708.5 07/29/21 1l + SCALE 10' FROM LINED WATER BODY v 5' FROM SEPTIC TANK1 "=1 0, C\2, � � I � a � _- - -- � � y ENGINEER INV=6707.5- v. C HALE DWG FILE C oodstelnDrive INSTALL LEACH _ A ` r r' r ,r e FIELD, SEE DETAILS JOB 517-019 ti INV=6707.0 ' SHEET \ s = \ IN 4 1 � T 1 1 8. COVER CHAMBERS TO A MINIMUM OF 12" AFTER CONSOLIDATION FOR H-10 APPLICATIONS AND 18" MINIMUM COVER AFTER CONSOLIDATION FOR H-20 APPLICATIONS. AVOID LARGE ROCKS OR DEBRIS IN COVER MATERIAL. A WELL GRADED, CRUSHED GRAVEL AND CAREFUL COMPACTION IS RECOMMENDED FOR H-20 INSTALLATIONS. CONSTRUCTION SPECIFICATIONS SECTION A -A Not to Scale 1. Topsoil shall be stripped, stockpiled and replaced over all disturbed areas. Existing trees and shrubs shall remain unless otherwise approved by the Owner; existing vegetation shall not be disturbed beyond the necessary limits of the construction. 2. All disturbed areas shall be revegetated by the Owner. 3. The site shall be graded so that runoff water does not drain onto the leach field surface. 4. Construction shall conform to Garfield County Regulations. 5. Chris Hale, Mountain Cross Engineering, Inc. shall be notified of the construction progress so the system may be inspected. Do not backfill over any system components until they have been inspected. 6. Sewer piping shall be bedded and initially backfilled with gravel 4 inches under piping and 6 inches on top. of piping. Backfill shall be wheel -roll compacted. Piping shall be installed watertight and to prevent freezing. 7. The septic tank shall be precast concrete, set level on a bed of gravel. Install the tank in accordance with the manufacturer's recommendations. 8. The septic tank capacity must be at least the size specified. 9. The septic tank inlet must be at least 3 inches higher than the outlet. An inlet tee or baffle must extend above the surface of the liquid to within 1 inch of the bottom of the tank top and must extend at least 14 inches below the inlet. 10. A filter is required on the final outlet tee or at some point between the septic tank and absorption field so that only the liquid effluent will be discharged. Other outlet tees or baffles must extend above the surface of the liquid to within one inch of the underside of the tank top. Tees must extend at least 14 inches below the outlet. 11. The distance from the septic tank outlet to the underside of the tank top must be at least 10 inches. 12. Liquid depth must be at least 30 inches and must not exceed the septic tank length or 60 inches, whichever is less. 13. A septic tank must have two or more compartments (or more than one tank in series to provide the necessary capacity). The first compartment must be at least as large as the second compartment. 14. The transfer of liquid from the first compartment to the second or successive compartment must be made at a liquid depth of at least 14 inches below the outlet invert, but not in the sludge zone. 15. At least one access no less than 20 inches across must be provided in each compartment of a tank. 16. .The opening cover of a septic tank, inspection port, or sampling access port must be marked and must be no more than 8 inches below the finished grade. It must be made of materials resistant to degradation from moisture or sewer gases. 17. Pipe meeting or exceeding ASTM standard 3034 properly supported to prevent failure by settling must extend from the septic tank at least five (5) feet from the inlet and outlet ends. 18. All wastewater lines used must be constructed of compatible pipe, bonding agent, and fittings. The following may be used: plastic pipe and fittings with a minimum wall thickness of ASTM Standard 3034, SDR35, or equivalent, perforated distribution pipe surrounded by rock within a soil absorption system with a minimum wall thickness conforming to ASTM Standard 2729; or corrugated polyethylene pipe with smooth interior meeting ASTM F405 and AASHTO M252 specifications or equivalent. Tile, open -joint pipe, and cast iron pipe may not be used in ISDS's. 19. All components, work, equipment, and material must be designed, operated and maintained so as to comply with the minimum requirements of the applicable and current Plumbing, Electrical, Building or other code in force on the date of the OWTS Permit Application. 20. Major components not constructed on the site where installed must have a permanent plate or other indelible marking, easily read and visible, for the purpose of inspection, to include name of manufacturer, model or serial number designation, and maximum design capacity of the unit. 21. Gravel shall be clean, screened rock �/z" to 2-%" in size. 22. Tanks, treatment units, and piping material must be watertight and must be certified by the Water Quality Control Division of the Colorado Department of Public Health and Environment. Under certain circumstances, the Department may require the tank be filled with water prior to backfill to check for leaks. 23. The ground over any part of the OWTS must be restricted to activity or use that will allow the system to function as designed and that will not contribute to compaction of the soil or to the structural loading detrimental to the capability of the component to function as designed. Driveways, parking. areas, storage buildings, large animal confinement areas and other similar uses may not be placed on or above an OWTS disposal field. 24. Machine tamping, rolling, or hydraulic compaction of final cover is not permitted, however, hand tamping may be allowed where necessary to stabilize the soil to prevent erosion or the intrusion of extraneous water. 25. Siphon to be model 414 by ORENCO Systems, Inc. or approved equal. Install per manufacturer's recommendations. OWTS DESIGN CALCULATIONS GOODSTEIN RESIDENCE: DESIGN FOR 5 BEDROOMS DESIGN FLOW PER GARFIELD COUNTY TABLE 6-1 = 600 gpd USDA SOIL TYPE IS 2A; LOAM OR SILT LOAM, LTAR ASSUMED = 0.50 gal./day/sq.ft. PER GARFIELD COUNTY TABLE 10-1. MINIMUM ABSORPTION AREA = 600 gpd / 0.5 gal./day/sq.ft. = 1,200 sq.ft. USE SIPHON DOSING FOR 0.9 REDUCTION USE CHAMBERS IN TRENCHES FOR 0.7 REDUCTION REQUIRED LEACH FIELD AREA = (0.9)*(0.7)*1200 sq.ft. = 756 sq.ft. REQUIRED CHAMBERS = (756 sq. ft.)/(12 sq. ft./chamber) = 63 chambers USE FOUR ROWS OF 16 CHAMBERS = 64 REQUIRED SEPTIC TANK VOLUME = 1,500 gallons PER GARFIELD COUNTY TABLE 9-1 DOSING FREQUENCY = 4 doses/day DOSE VOLUME _ (600 gpd) / (4 dpd) = 150 gallons/dose 13" DEPTH IN 70"x38" THIRD COMPARTMENT, USE ORENCO SIPHON MODEL #414 REMOVABLE CAP 4" PVC PIPE CUT HOLE IN CHAMBER. CAULK AROUND PIPE. 4" PERF. PIPE INSTALLED W/ PERFORATIONS DOWN IN�FT 12"0 ROUND IRRIGATION VALVE BOX INSTALL FLUSH WITH FINISHED GRADE 4 VENT HOLES Yz 4 MIN. W DISTRIBUTION BOX W/ BAI ALL INVERTS OUT TO 8 IDENTICAL ELEVAT THE INVERT IN T( 6" ABOVE INVERT 4 -INCH SOLID PVC PIPES AT 2% MIN. SLOPE OUT TO FOUR ROWS OF CHAMBERS DISTRIBUTION BOX Not to Scale ISDS PROFILE Not to Scale 4" PVC PIPE ® 2% MIN. FROM DOSING TANK 4 -INCH SDR35 PVC SEWER AT MIN. 1/4" PER FOOT SLOPE (TYP) CONCRETE SUPPORT �"N ENCASE WYE IN CONCRETE BRASS OR CAST IRON CAP AND COVER PROVIDE ADEQUATE SUPPORT FOR PIPE BEFORE AND DURING BACKFILLING CLEANOUT DETAIL Not to Scale 4 -INCH SDR35 PVC SEWER AT MIN. 1/4" PER FOOT SLOPE (TYP) CONCRETE SUPPORT Not to Scale E W 'gy'pA V/ v T E ■M (D 0 E CO (D i to cc ■® c co) T dt °o c En ,4e 1k y W 1Y 1k O� a Z: E, NOTES: 1 O 'a� U u`ai 1. EXCAVATE TRENCHES TO PROPER WIDTH, AND PROPER H O DEPTH AS REQUIRED BY STATE AND LOCAL CODES.Sl 12 MIN' '- c " 4" CLEANOUT RISERS TO GRADE AS r p SMOOTH 2. IRREGULARITIES IN THE EXCAVATION. A LEVEL, FLAT SURFACE IS NECESSARY. �� MAX. FLEXIBLE COUPLING NEEDED (TYPICAL) ORENCO SYSTEMS y % 0 £ SIPHON, MODEL 414 C G \\ 1 FILTER W HANDLE / INSTALLED PER Iy p 3. ASSEMBLE BIODIFFUSER LEACHING CHAMBERS AND ` RESIDENCE MANUFACTURER'S Z: O U 3 UNIVERSAL ENDPLATES TOGETHER IN TRENCH(ES). - - RECOMMENDATIONS C ZIP TIE, WIRE, OR OTHER APPROVED OR APPROVED EQUAL DISTRIBUTION BOX, d ,� 4. THE UNIVERSAL END PLATE IS CONSTRUCTED WITH TABS SO THAT THE EARTH FILL ON ONE SIDE WILL HOLD IT /� ` METHOD OF HANGING PERF. PIPE SEE DETAILS (� TO TOP OF CHAMBER (TYP.) j v SECURELY IN PLACE AGAINST THE BIODIFFUSER. / \ SUSPEND 6" MIN. ABOVE GROUND. INSPECTION PORTS (� E C O at c 5. PUNCH OUT PIPE HOLE OPENINGS IN THE END PLATES AS NEEDED AND CONNECT INLET PIPES./\ �� PIPE TO BE INSTALLED LEVEL �_ GRADE (VARIES) �• Z: O > � X THREE > 6. FILL SIDEWALL AREA TO TOP CHAMBERS NATIVE COMPARTMENT OWN r- WITH SOIL c2 1/2" 4 -INCH SDR35 PVC SEWER AT 1,500 GALLON TOP SEAM SEPTIC TANK, C 7. "WALK IN" FILL TO COMPACT SOIL ALONG SIDES OF MIN. 1/4" PER FOOT SLOPE (TYP) PER VALLEY PRECAST OR O / �+ R r o CHAMBER. THIS IS VERY IMPORTANT TO ACHIEVE FULL APPROVED EQUAL FI_-� • WEIGHT RATING. W N U t Q - 8. COVER CHAMBERS TO A MINIMUM OF 12" AFTER CONSOLIDATION FOR H-10 APPLICATIONS AND 18" MINIMUM COVER AFTER CONSOLIDATION FOR H-20 APPLICATIONS. AVOID LARGE ROCKS OR DEBRIS IN COVER MATERIAL. A WELL GRADED, CRUSHED GRAVEL AND CAREFUL COMPACTION IS RECOMMENDED FOR H-20 INSTALLATIONS. CONSTRUCTION SPECIFICATIONS SECTION A -A Not to Scale 1. Topsoil shall be stripped, stockpiled and replaced over all disturbed areas. Existing trees and shrubs shall remain unless otherwise approved by the Owner; existing vegetation shall not be disturbed beyond the necessary limits of the construction. 2. All disturbed areas shall be revegetated by the Owner. 3. The site shall be graded so that runoff water does not drain onto the leach field surface. 4. Construction shall conform to Garfield County Regulations. 5. Chris Hale, Mountain Cross Engineering, Inc. shall be notified of the construction progress so the system may be inspected. Do not backfill over any system components until they have been inspected. 6. Sewer piping shall be bedded and initially backfilled with gravel 4 inches under piping and 6 inches on top. of piping. Backfill shall be wheel -roll compacted. Piping shall be installed watertight and to prevent freezing. 7. The septic tank shall be precast concrete, set level on a bed of gravel. Install the tank in accordance with the manufacturer's recommendations. 8. The septic tank capacity must be at least the size specified. 9. The septic tank inlet must be at least 3 inches higher than the outlet. An inlet tee or baffle must extend above the surface of the liquid to within 1 inch of the bottom of the tank top and must extend at least 14 inches below the inlet. 10. A filter is required on the final outlet tee or at some point between the septic tank and absorption field so that only the liquid effluent will be discharged. Other outlet tees or baffles must extend above the surface of the liquid to within one inch of the underside of the tank top. Tees must extend at least 14 inches below the outlet. 11. The distance from the septic tank outlet to the underside of the tank top must be at least 10 inches. 12. Liquid depth must be at least 30 inches and must not exceed the septic tank length or 60 inches, whichever is less. 13. A septic tank must have two or more compartments (or more than one tank in series to provide the necessary capacity). The first compartment must be at least as large as the second compartment. 14. The transfer of liquid from the first compartment to the second or successive compartment must be made at a liquid depth of at least 14 inches below the outlet invert, but not in the sludge zone. 15. At least one access no less than 20 inches across must be provided in each compartment of a tank. 16. .The opening cover of a septic tank, inspection port, or sampling access port must be marked and must be no more than 8 inches below the finished grade. It must be made of materials resistant to degradation from moisture or sewer gases. 17. Pipe meeting or exceeding ASTM standard 3034 properly supported to prevent failure by settling must extend from the septic tank at least five (5) feet from the inlet and outlet ends. 18. All wastewater lines used must be constructed of compatible pipe, bonding agent, and fittings. The following may be used: plastic pipe and fittings with a minimum wall thickness of ASTM Standard 3034, SDR35, or equivalent, perforated distribution pipe surrounded by rock within a soil absorption system with a minimum wall thickness conforming to ASTM Standard 2729; or corrugated polyethylene pipe with smooth interior meeting ASTM F405 and AASHTO M252 specifications or equivalent. Tile, open -joint pipe, and cast iron pipe may not be used in ISDS's. 19. All components, work, equipment, and material must be designed, operated and maintained so as to comply with the minimum requirements of the applicable and current Plumbing, Electrical, Building or other code in force on the date of the OWTS Permit Application. 20. Major components not constructed on the site where installed must have a permanent plate or other indelible marking, easily read and visible, for the purpose of inspection, to include name of manufacturer, model or serial number designation, and maximum design capacity of the unit. 21. Gravel shall be clean, screened rock �/z" to 2-%" in size. 22. Tanks, treatment units, and piping material must be watertight and must be certified by the Water Quality Control Division of the Colorado Department of Public Health and Environment. Under certain circumstances, the Department may require the tank be filled with water prior to backfill to check for leaks. 23. The ground over any part of the OWTS must be restricted to activity or use that will allow the system to function as designed and that will not contribute to compaction of the soil or to the structural loading detrimental to the capability of the component to function as designed. Driveways, parking. areas, storage buildings, large animal confinement areas and other similar uses may not be placed on or above an OWTS disposal field. 24. Machine tamping, rolling, or hydraulic compaction of final cover is not permitted, however, hand tamping may be allowed where necessary to stabilize the soil to prevent erosion or the intrusion of extraneous water. 25. Siphon to be model 414 by ORENCO Systems, Inc. or approved equal. Install per manufacturer's recommendations. OWTS DESIGN CALCULATIONS GOODSTEIN RESIDENCE: DESIGN FOR 5 BEDROOMS DESIGN FLOW PER GARFIELD COUNTY TABLE 6-1 = 600 gpd USDA SOIL TYPE IS 2A; LOAM OR SILT LOAM, LTAR ASSUMED = 0.50 gal./day/sq.ft. PER GARFIELD COUNTY TABLE 10-1. MINIMUM ABSORPTION AREA = 600 gpd / 0.5 gal./day/sq.ft. = 1,200 sq.ft. USE SIPHON DOSING FOR 0.9 REDUCTION USE CHAMBERS IN TRENCHES FOR 0.7 REDUCTION REQUIRED LEACH FIELD AREA = (0.9)*(0.7)*1200 sq.ft. = 756 sq.ft. REQUIRED CHAMBERS = (756 sq. ft.)/(12 sq. ft./chamber) = 63 chambers USE FOUR ROWS OF 16 CHAMBERS = 64 REQUIRED SEPTIC TANK VOLUME = 1,500 gallons PER GARFIELD COUNTY TABLE 9-1 DOSING FREQUENCY = 4 doses/day DOSE VOLUME _ (600 gpd) / (4 dpd) = 150 gallons/dose 13" DEPTH IN 70"x38" THIRD COMPARTMENT, USE ORENCO SIPHON MODEL #414 REMOVABLE CAP 4" PVC PIPE CUT HOLE IN CHAMBER. CAULK AROUND PIPE. 4" PERF. PIPE INSTALLED W/ PERFORATIONS DOWN IN�FT 12"0 ROUND IRRIGATION VALVE BOX INSTALL FLUSH WITH FINISHED GRADE 4 VENT HOLES Yz 4 MIN. W DISTRIBUTION BOX W/ BAI ALL INVERTS OUT TO 8 IDENTICAL ELEVAT THE INVERT IN T( 6" ABOVE INVERT 4 -INCH SOLID PVC PIPES AT 2% MIN. SLOPE OUT TO FOUR ROWS OF CHAMBERS DISTRIBUTION BOX Not to Scale ISDS PROFILE Not to Scale 4" PVC PIPE ® 2% MIN. FROM DOSING TANK 4 -INCH SDR35 PVC SEWER AT MIN. 1/4" PER FOOT SLOPE (TYP) CONCRETE SUPPORT �"N ENCASE WYE IN CONCRETE BRASS OR CAST IRON CAP AND COVER PROVIDE ADEQUATE SUPPORT FOR PIPE BEFORE AND DURING BACKFILLING CLEANOUT DETAIL Not to Scale 4 -INCH SDR35 PVC SEWER AT MIN. 1/4" PER FOOT SLOPE (TYP) CONCRETE SUPPORT Not to Scale Y M W H Q 0 DATE 07/29/21 SCALE 1 "=10' ENGINEER C. HALE DWG FILE GoodsteinDrive JOB 517-019 SHEET 5 E W 'gy'pA V/ v 'n V, ■M (D 0 E CO (D i to cc ■® c co) En CnM ®� O� a V / 1 Y M W H Q 0 DATE 07/29/21 SCALE 1 "=10' ENGINEER C. HALE DWG FILE GoodsteinDrive JOB 517-019 SHEET 5