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Home My WebLink AboutOWTS Design & Repair Report 02.13.2012)(IQ IF PO Box 2844 %L J( /j Glenwood Springs, CO 81602 / Ph 970.618.5033 i 1 . Fax 303-216-2796 February 13, 2012 Carol Proud 899 Gage Road Rifle, Colorado 81650 (14.3 N3 I ‘,7-2.17 Project No. 1937 Subsurface Review and Repair Onsite Wastewater System Design, Existing Residence 899 Gage Road Garfield County, Colorado Carol, ALL SERVICE septic, LLC performed a subsurface investigation and a repair onsite wastewater system (OWS) design for the subject residence. The property is located outside of Glenwood Springs, Colorado, in an area where OWS are necessary. Per the septic permit water is supplied to the residence via a water storage tank. A 100ft separation is mandatory between any wells and the proposed new drywell. SITE CONDITIONS A single-family, 3 -bedroom residence exists and is utilizing an OWS which is experiencing problems. The septic tank is in good condition, although the drain field will be abandoned and replaced. The proposed drywell drain field area is relatively flat. SUBSURFACE The subsurface was investigated by evaluating the local soil conditions. The materials anticipated are sandy clay, with sparse rock debris. Our office should be contacted to evaluate the drywell excavation to confirm soil conditions. An LTAR of 0.95 gals/day will be used to design the OWS. DESIGN SPECIFICATIONS The OWS design is based on 3 -bedrooms and an average sewage load of 450 GPD. The installation must include the existing 1000 -gallon, two-compartment, concrete septic tank, with the addition of an effluent filter. One `drywell' must be constructed as indicated on plans. The drywell must be 14 -ft by 14 -ft, and must be 10 feet deep. 5 -foot perforated concrete rings must be used in the drywell construction. The total proposed area is 756 SF. Construction must be according to the county ISDS regulations, the septic permit provided by Garfield County Environmental Health Department, and this design. This design for the subject property, noted above, is valid only in conjunction with the approved County Health Department permit. Onsite Wastewater Systems Page 2 OPERATION INFORMATION AND MAINTENANCE The surface of the drain field should be seeded upon completion. Vegetation is an important factor in drain field performance. Erosion control should be practiced prior to and during re -vegetation. Geo - fabrics or plastics should not be used over the drain field. No heavy equipment, machinery, or materials should be placed on backfilled drain field. Livestock should not graze on the drain field. Plumbing fixtures should be checked to ensure that no additional water is being discharged to OWS. For Example, a running toilet or leaky faucet can discharge hundreds of gallons of water a day and harm a drain field. The homeowner should pump the septic tank every two years and clean the effluent filter as needed. Garbage disposal use should be minimized, and non -biodegradable materials should not be placed into the OWS. Grease should not be placed in household drains. Loading from a water softener should not be discharged into the OWS. No hazardous wastes should be directed into the OWS. Mechanical room drains should not discharge into the OWS. The OWS is engineered for domestic waste only. ADDITIONAL CONSTRUCTION NOTES If design includes a pump, air release valves and weep holes should be installed to allow pump lines to drain to minimize risk of freezing. Excavation equipment must not drive in excavation of drain field due to the potential to compact soil. Extensions should be placed on all septic tank components to allow access to them from existing grade. Precast concrete tanks and distribution boxes should be used, unless plastic or fiberglass is required. Access to all tank compartments and distribution devices is optimal. INSTALLATION OBSERVATIONS ALL SERVICE septic, LLC, and the county must view the OWS during construction. The OWS observation should be performed before backfill, after placement of chambers and distribution pipes. Septic tanks, distribution devices, pumps, dosing siphons, and other plumbing, as applicable, must also be observed. ALL SERVICE septic, LLC should be notified 48 hours in advance to observe the installation. LIMITS: The design is based on information submitted. If soil conditions encountered are different from conditions described in report, ALL SERVICE septic, LLC should be notified. All OWS construction must be according to the county regulations. Requirements not specified in this report must follow county regulations. The installer should have documented and demonstrated knowledge of the requirements and regulations of the county in which they are working. Please call with questions. Sincerely, ALL SER , septic, LLC h . Petz y z 3 copies Reviewed By: Richard H. Pet; Onsite Wastewater Systems Page 3 N Scale: Not to Scale W z rJ O Q SITE PLAN PROPERTY LINE 1,101 10 SCA1t GAGE ROAD fill Roe', P.O. Box 2844 Glenwood Springs, Colorado 81602 Phone 970.618.5033 Fax 303.216.2796 Proud Residence 899 Gage Road Garfield County, Colorado Project Number: 1937 W1.0 Sheet 1 of 4 N 0' 10' 20' Scale: 1" = 20'-0" Er - 3 -BEDROOM RESIDENCE Must ie no wells 100' EXISTING SEWER PIPE AND CLEANOUT EXISTING 1000 -GALLON CONCRETE SEPTIC TANK TO REMAIN, ADD EFFLUENT FILTER NEW SEWER PIPE (2% SLOPE TO DRYWELL) 1 OBSERVATION PIPE 0 PROPOSED OWS NA1 TA ._• NEW 14'x14'x10' DEEP DRYWELL WITH 60" DIAMETER PERFORATED CONCRETE RINGS EXISTING DRAIN FIELD TO BE ABANDONED pit pan P.O. Box 2844 Glenwood Springs, Colorado 81602 Phone 970.618.5033 Fax 303.216.2796 Proud Residence 899 Gage Road Garfield County, Colorado Project Number: 1937 W2.0 Sheet 2 of 4 PLAN VIEW SWALE OR BERM TO DIVERT SURFACE RUNOFF 4" PVC INLET LINE 1 FROM SEPTIC TANK MANHOLE COVER DRYWELL DRAIN FIELD SPECIFICATIONS 4 ,. CROSS SECTION NATURAL GRADE INLET FROM SEPTIC TANK 10' EXTENT OF EXCAVATION PLACE AN 8 -INCH BED OF GRAVEL PRIOR TO PLACING CONCRETE RINGS FOR STABILITY CALCULATIONS 14' SLOPE FOR DRAINAGE a 4 14' — DISPERSAL GRAVEL SHOULD BE 1/2" TO 2 1/2" SIDES OF EXCAVATION OBSERVATION PIPE WITH PVC CAP CONCRETE LID WITH MANHOLE COVER 14' 3 -BEDROOMS @ 150 GALS/PER/DAY EACH = 450 GPD PEAK LOADING = 450 X 1.5 = 675 GALS LOADING = 675 GALLONS PER DAY (GPD) APPLICATION RATE = .95 GPD/SF AREA = 675 / 0.95 = 711 SF PROPOSED AREA = 756 SF 0 DRYWELL DETAILS N4,1 f BERM OR SWALE GEO-FABRIC — DISPERSAL GRAVEL SLOTTED PVC OBS. PIPE TO EXTEND TO BOTTOM OF DRYWELL — — 5 FOOT DIAMETER CONCRETE PERFORATED RINGS AREA = BOTTOM AREA = 14 X 14' = 196 SF SIDE AREA =14'X 10'=140 SFX2=280 SF SIDE AREA = 14' X 10' = 140 SF X 2 = 280 SF TOTAL AREA = 756 SF PROPOSED DISPERSAL GRAVEL SHOULD BE 1/2" TO 2 1/2" WASHED / CLEAN ROCK REVEGETATE DRAIN FIELD SURFACE �IL�E ui� P.O. Box 2844 Glenwood Springs, Colorado 81602 Phone 970.618.5033 Fax 303.216.2796 Proud Residence 899 Gage Road Garfield County, Colorado Project Number: 1937 W3.0 Sheet 3 of4 G Q 4 E • a a ///fff . . . 4 a -- / 1 !1 9 d J 14' 3 -BEDROOMS @ 150 GALS/PER/DAY EACH = 450 GPD PEAK LOADING = 450 X 1.5 = 675 GALS LOADING = 675 GALLONS PER DAY (GPD) APPLICATION RATE = .95 GPD/SF AREA = 675 / 0.95 = 711 SF PROPOSED AREA = 756 SF 0 DRYWELL DETAILS N4,1 f BERM OR SWALE GEO-FABRIC — DISPERSAL GRAVEL SLOTTED PVC OBS. PIPE TO EXTEND TO BOTTOM OF DRYWELL — — 5 FOOT DIAMETER CONCRETE PERFORATED RINGS AREA = BOTTOM AREA = 14 X 14' = 196 SF SIDE AREA =14'X 10'=140 SFX2=280 SF SIDE AREA = 14' X 10' = 140 SF X 2 = 280 SF TOTAL AREA = 756 SF PROPOSED DISPERSAL GRAVEL SHOULD BE 1/2" TO 2 1/2" WASHED / CLEAN ROCK REVEGETATE DRAIN FIELD SURFACE �IL�E ui� P.O. Box 2844 Glenwood Springs, Colorado 81602 Phone 970.618.5033 Fax 303.216.2796 Proud Residence 899 Gage Road Garfield County, Colorado Project Number: 1937 W3.0 Sheet 3 of4 FINISHED GRADE SLIP-ON PVC CAP DO NOT GLUE 1- EFFLUENT LINE - 4" SCHEDULE 40 OR 4" SDR 35 P.V.C. SEWER LINE - 4" SCHEDULE 40 P.V.C. INSULATED COPPER TRACER WIRE MAY BE INSTALLED TO LOCATE LINE IN FUTURE CLEANOUT DETAIL ROT TO SCALE Septic Tank with the Addition of an Effluent Filter -1000 Gallon, 2 -Comp. Concrete Risersw Siope Ground Away From Risers Top of tee to come to 1" from top of tank lid Inlet Tee ORENCO BRAND NAN NOT ENFORCED LTJ TANK DETAIL r10T T6 SC AL.: Filter Cartridge Handle (field cut to desired height) Tank Adapter (cast or bolted) Vent Orifice Effluent Discharge Modulating Discharge Orifices Vault Inlet Ports — Filter Cartridge Effluent Filter P.O. Box 2844 Glenwood Springs, Colorado 81602 Phone 970.618.5033 Fax 303.216.2796 Proud Residence 899 Gage Road Garfield County, Colorado Project Number: 1937 W4.0 Sheet 4 of 4