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Home My WebLink AboutDRAKE BLK 2 LT 1 6REI-. ANCHORA6E AREA BOR" J6H Department of Environmental Quality 3330 C Street Anchorage, Alaska 99503 INSPECTION REPORT ON-SITE SEWAGE DISPOSAL SYSTEM SEPTIC TANK: F~OM WEL~O~IANU FACTU RER 5~i'~ .~'', ~'~ L MATE R IAI.,..~'~E:.~ ~ COMPARTMENTS ~ INSIDE LENGTH ~ . INSIDE WIDTH ..... LIQUID DEPTH.'-'---' LIQUID CAPACITY ~OOO GALLONS. SEEPAGE PIT: NUMBER OF PITS I . DIAMETER -- OR WIDTH ~-b' , LINING MATERIAL ~¥-tk~1(~ CRIB SIZE: DIAMETER BUILDING FOUNDATION~/, NEAREST LOT LINE~,,'.~.O'~ LENGTH I~'_/, DEPTH !C~! DEPTH , DISTANCE FROM: WELL~. TOTAL EFFECTIVE ABSORPTION AREA (WALL AREA) 33(~ . SQ. FT. ADDITIONAL ABSORPTION WELLL~O~:)O.~0 ~ ~-~ -~--~:~.~.-~.-.~'///s ~,/~-~_~/~v~ .~.~o. TYPE ~ ~' ~ ~,)~'¥C- ~'t~\C~ CONSTRUCTION DEPTH DISTANCE FROM: BUILDING NEAREST NEAREST SEPTIC SEEPAGE FOUNDATION_ , LOT LINE , SEWER LINE , TANK , SYSTEM CESSPOOL , OTHER SOURCES APPROVED DISAPPROVED REMARKS DISTANCES: INSTALLED BY.'~.~;~-(~ (~'~1~O~ ~- PIPE MATERIAL: _~.!i C~ LOT SLOPE: REMARKS: Form No. EQ-O31 DJ~AG RAI~I,OF SYSTEM I t I [ ~5¢~P'~5¢ ,. DATE APPROVED ,- A. '~I~11, ~ G.A.A.B. ~.: GReaTeR AnChORaGe ARea BOROUgh DEPARTMENT OF ENVIRONMENTAL QUALITY 3330 "C" STREET ANCHORAGE, ALASKA 99503 TELEPHONE 274-4561 SEWAGE DISPOSAL SYSTEM -- APPLICATION AND PERMIT PERMIT NO. INSTALLATION OF: SEPTIC TANK SEEPAGE PIT DRAIN FIELD OTHER FINANCED THROUGH ~ TO BE INSTALLED BY SOIL TEST RESULTS ~J ~~~~ ~ NOTE= THI= PERMIT IS NOT VALID WITHOUT BOIL FINAL INSPECTION: 24 HOUR NOTICE REQUIRED. BACKFILLING OF ANY SYSTEM WITHOUT FINAL INSPECTION BY THE DEPARTMENT OF ENVIRONMENTAL QUALITY AUTHORITY WILL BE SUBJECT TO PROSECUTION. SEPTIC TANK SIZE/P'~~ MINIMUM DISTANCED, REQUIREMENTB FOUNDATION TO SEPTIC TANK FOUNDatIoN TO SEEPAGE PIT SEPTIC TANk TO SEEPAGE PIT WaLL SEPTIC TANK ~ / TYPE ~'"'~"~---~'"'~ ~.~/'~ DRAIN FIELD SEEPAGE PIT ~ / · DRAIN FIELD TO NEAREST LOT LINE. WELL TO SEPTIC TANK J~:~' ~ / . SEEPAGE PIT DRAIN FIELD ALSO CONSIDER AREA WELLS. WATER MAIN TO SEPTIC TANK . SEEPAGE Pitj~:~ DRAIN FIELD . / SEPTIC TANK, /f/~fP / SEEPAGE Pit . ~ , . DRAIN FIELD TO RIVEr, LAke, STREAm. DIAGRAM OF SYSTEM CAST IRON INTO AND OUT OF SEPTIC TANK AND INTO CRIB CROSSING GAP OF EXCAVATION 5 FEET INTO UNDISTURBED SOIL. 4 INCH DIAMETER CAST IRON SIPHON PIPES ON SEPTIC TANK AND SEEPAGE PIT FITTED WITH AIRTIGHT REMOVABLE CAPS. GRAVEL BACKFILL CONFORM TO BOROUGH REGULATIONS REGARDING INSTALLATION. G ,A.A .B. OR LICENSED DESIGNER I CERTIFY THAT I AM FAMILIAR WITH THE REQUIREMENTS OF GREATER ANCHORAGE AREA BOROUGH ORDINANCE NO. 28-68 AND THAT THE ABOVE DESCRIBED SYSTEM IS IN ACCORDANCE WITH SAID CODE. FORM NO, EQ-016 3500 TUDOR ROAD AM ANCHORAGE, ALASKA 99502 ~REATER ANCHO~GE AR~A Performed ~or ~ma~ ~, ..~K~W~I Date Performed ~-2¢-7~ Leeal DescriptiOn: Lot I Block ~ Subdivision This Porm Re~orts Soils Log? Percolation Test 1 2 3 Qe~th Feet Soil Characteristics 5 6 7 9__ Toi,,o; I s Ground Water Encountered? ~0_ I!~ Yes, At what Denth? Reading Date Grnss Time t Net Time I Denth to H20 Percolation Rate ~et Dron; Prnposed Inst~-~-i-~t--i-?7[,'.. ... Se.~;',~,,e .Pit x ,n,..~i-. , ~e'ld, Den. th of Inlet ~ .... ~ Den'~l~--~-]~'O~-{-om Of Pit Or Trench.~-~ -Test Performed B v ~4'~ ~-- Para Ce r,ti f~ed ENGINEERING COMPANY 03^1333 ENGINEERS. PLANNERS. SCIENTISTS 3anuary 22, 1986 9~[ g NVf 9024 Vanguaed Drive, Suite 201 Anchorage, AK 99507 Ph. [907) 349-2557 NOIJO~.LO~d 1VIN~Y~NO~IAN] g H/gV3H JO 'id30 13685 Mrs. Susan Oswalt Program Manager of On-Site Services Municipal Department of Health and Environmental Protection Pouch 6-650 Anchorage, Alaska 99502 ' Reference: Heatherwood Stables, Lot. 1 BlOck 2 Drake Subdivision, Anchorage Mrs. Oswalt: During the rezoning of the above referenced project to PLI, to allow a commercial recreational equestrial facility, certain concerns were expressed requiring special considerations regarding water supply, surface water quality, solid waste and wastewater disposal. Following our investigations and inquiries into these matters, including discussions with your department, our approach and recommendations are outlined below. ANIMAL WASTE HANDLING While some stables in town remove the wastes and dispose it at a public dump site, it's common practice with others to let the waste accumulate on-site where it's either sold as fertilizer or mixed with earth and used as landfill. The latter results in offensive odors particularly in the spring, due to increased biological activity after a dormant period. Apparently this was the case within this subject site some time ago, and now it's the cause for concern for the neighbors. There are several methods for treating the solid waste on-site, such as conversion to gas for heating purposes and/or incineration. The safest and simplest method is removal from the site and disposal at a public dump site where provisions are made to accept such wastes. Wastes from other stables are currently transported to the Municipal solid waste sites where such provisions are available; and therefore, we recommend the removal and transfer of the wastes as such. The wastes can be stored on-site in conventional trash containers. In order to control offensive odors, we recommend treating each added layer with lime as an absorbant. This method is extensively proven effective in controlling odor, particularly if used in conjunction with cellulose (shredded newspaper) in preparation of the bedding in the stalls. SURFACE DRAINAGE AND WATER QUALITY There are no streams and/or lakes in close vicinity of this project that are designated for contact recreation purposes by the Municipal Water Quality Management Plan. The areawide storm drainage provisions for this area is the Lake Otis/Huffman Hills underground storm system. This system Mrs. Susan Oswalt 3anuary 22, 1986 Page 2 is generally known also as the Furrow Creek drainage basin network, consisting of a combination of underground and modified surface routes with some natural stream beds within undeveloped areas. The system discharges storm water directly into Turnagain Arm in the Oceanview area. No water quality provisions were ever considered as a part of this system, because it's basically considered a storm water conveyance network with very small year round flow mostly stemming from the subdrain. The distance from the subject site to the nearest storm drain catch basin is approximately 2,000 feet routed along roadside ditches. However, with future road improvements in this area, underground storm drainage provisions can be made available in dose proximity of the site. Because of the existance of surface drainage routes as a part of the areawide drainage system, we fed that source point considerations for water quality control are valid. Simple control measures can go a long way in preventing excessive water quality degradation. The primary source of concern in this case is animal wastes washing over the surface with storm water and snow melt, thus increasing the bacteria levels in the water. In particular, paved surfaces significantly contribute to this problem, since rapid surface run-off does not permit the wastes to disintegrate on site. In this light, we £eel effective preventive measures for surface water quality control shall consist of.' Crushed rock surfaces instead of asphalt pavement for parking areas and driveways. Manual means of removing the solid wastes such that no surface accumulation of animal wastes occur. The crushed rock surfaces will provide a porous medium to absorb liquid wastes, thus providing soil absorption treatment similar to the septic disposal systems. Furthermore, the crushed rock surfaces significantly reduce the surface run-off by increasing ground infiltration, and thus controlling the surface water contamination. In consideration of the foregoing, we have designed the grading and drainage for this site to avoid concentrating surface run-off by allowing the parking areas and roof drainage to sheet-drain over large areas before reaching the roadside ditches. We feel the above measures should adequately address water quality considerations, without introducing complicated and cumbersome treatment systems. WATER SUPPLY The average daily water consumption, by the most conservative estimate, for this development is 2,000 gallons per day, or average 1.4 gallons per minute. The maximum day's demand based on 1.75:1 ratio therefore, should be 2.4 gpm and the peak demand should be approximately 5 gpm. These estimates are based on 150 gallons per capita per day DEC criteria for AZIZ ENGINEERING COMPANY Mrs. Susan Oswalt 3anuary 22, 1986 Page 3 average 10 persons' use per day, plus 20 gallons per day per horse drinking and bathing water demand for 22 horses. The existing well and the existing septic disposal system will be subject to review and approval by the Alaska Department of Environmental Conservation and Municipal Department of Health and Environmental Protection, pursuant to the Building Code requirements. We would like to entertain your comments and/or questions concerning this project before it is presented to the Planning and Zoning Commission for a Conditional Use Permit. You may .direct your, response to the Municipal Community Planning Department (please reference Case No. 85-109-2) and/or this firm, as you wish. I trust the above will provide sufficient information for your review. As I have mentioned during our previous discussions, the water well and wastewater disposal system, for the subject project will be subject to your Department's review and approval, pursuant to the Building Code requirements. Please don't hesitate to call if you have any questions or comments. Sincerely,