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Home My WebLink AboutBROADWATER HEIGHTS BLK 3 LT 11Broadwater Heights Block 3 Lot I I #050-131-70 Municipality of Anchorage C Development Services Department - Building Safety Division • . '-� On-Site Water and Wastewater Program, 4700 Bragaw St. P.O. Box 196650 Anchorage, AK 995196650 Page 1 of 2 www.cl.anchorage.ak.us (907) 343-7904 ON-SITE WASTEWATER DISPOSAL SYSTEM ANDIOR WELL INSPECTION REPORT Permit Number. SW060077 PID Number: 050.131.70 '6" Wastewater System: ® New ❑ Upgrade BOX 770996 Aarw. ABSORPTION FIELD Ptwta NueWar of fled . 6327272 3 O Daap Trash ® Sr,@Am Troch O ew O Ma 0011W LEGAL DESCRIPTION sal Ratvq TNM DOM firm Orprrlar- 1.2 GPDMe 0 Ft. slC to &Odw Daps W ppe bptan tram onpW qr . G," depth b.rratn pp 3 11 BROADWATER HEIGHTS -1 Ft. 1 Ft TO.WtV Rana. saawt Fe naaaa.tcra or" Qr a G," Wait, 14N 2W 1 3 Ft. 66 Ft. Well: ®New ❑Upgrade G. Nwpn NUMa ahv. Dnt.rca Ww.n trr. 5 Ft. 1 0 FL CIYM�(P"o A, B. C) T"Dpth Caws b Toto .D.ap.on.rw Pp. motoal PRIVATE 400 Ft. 1 58 Ft 375 Fe ASTM 3034 paar Data D"w SWC W.ur L" Yw.lw DN. hRauaO COLE SULLIVAN 615/2006 1 53 FL ALASKA EARTH MOVERS 6127/2006 Vw Pap set 0 Q S'- :;W V Cama Nag t Agora Gr TANK 0.4 GPM w. Ft. 2 Ft SEPARATION DISTANCES ® Septic ❑ Holding ❑ S.T.E.P. ❑ Other. To Septic Absorption Lift Holding lubliaPnvate vwd. . ty From Tank Field Station Tank Sewer Line ANCHORAGETANK 1500 Gal w.F +100' +100' — — 42S r .wi STEEL Nara« a cOnp.MwM. 1 2 s„r.o.w.ta +100' +100' — — LIFT STATION LO Lit* +5' +10' — — NO LIFT Fano +J +10' — — Pup On Mol M 'Pap Orr iev .t ".0 w.ia alarm N In h h L� +50' +50' — — Pup MMI a MOM Er kwp.ceoro P.r+am.O by Comm pan R'"y"`e GRINDER PUMP INSTALLED IN CRAWLSPACE NO CLEANOUTS BENCH MARK INSTALLED BETWEEN TANK AND HOUSE TO PREVENT Lmiit nary 0-wr"m Rebar in ground BLOWOUTS. LINE CAN BE SNAKED FROM THE ENDS. 100 Ft Inspections performed by: ERES Dates: 1" 612712006 �� •-- AJ,q 2nd 612712006 Development Services Department Approval t *' Conditional Approval Date: E:10387 Reviewed and approved by: Date— m.. o ) I Permit No. SW060077 Page 2 of 2 Municipality of Anchorage DEVELOPMENT SERVICES DEPARTMENT ON—SITE WATER & WASTEWATER PROGRAM 4700 SOUTH BRAGAW STREET P.O. BOX 196650, ANCHORAGE, AK 99519-6650 On—Site Wastewater Disposal System and/or Well Inspection Report Legal Description: BROADWATER HEIGHTS LOT 11 BLOCK 3 050-131-70 I� J N �/b N' HOUSE S 8'Vi94 10 s� LOT A S ti SCAM 1•_50, LOT 11 F S Jsi�'p7� T®1 e�f i x ��aq, I NEW )H-2 1500 OALDA,Ew Y y'P PERF TANK )BANK ROAR_ pR� --OL£1Wol T -¢ - WELL /l REBAR IN GROUND • - MONITOR TUBE ELEVATIONS ASSUMED ELEVATION • 100' (NOT TO SCALE) ORIGINAL GROUND LEVEL ATo 100.0 MT -1 3' FILL MT -2 /� TH-1 3' TANK 1500 GAL 101.4 •I' GRAVeL . 0 98.7 -100.9 99.9 NO, .W.T. BOTTOM OF T.H. 11 r \ s� LOT A S ti SCAM 1•_50, LOT 11 F S Jsi�'p7� T®1 e�f i x ��aq, I NEW )H-2 1500 OALDA,Ew Y y'P PERF TANK )BANK ROAR_ pR� --OL£1Wol T -¢ - WELL /l REBAR IN GROUND • - MONITOR TUBE ELEVATIONS ASSUMED ELEVATION • 100' (NOT TO SCALE) ORIGINAL GROUND LEVEL ATo 100.0 MT -1 3' FILL MT -2 /� TH-1 3' TANK 1500 GAL 101.4 •I' GRAVeL . 0 98.7 -100.9 99.9 NO, .W.T. BOTTOM OF T.H. 11 �Rb: NtoN C�� C�� O� to I W � W C0 V1 IQ 0 N --- D t` G -1 mi 91 UP A v MIL 7.2 ASBUILT V14' dol hogy� ��h�s I HEREBY CERTIFY -THAT I HAVE SURVEYED THE FOLLOWING DESCRIBED PROPERTY: AND �THAT NO CCROACH�TS !: ST EXCEPT AS INDICATED. IT IS THE RESPONSIBILITY OF THE OWNER TO DETERMINE THZ EXISTENCE OF ANY EASEMENTS, COVENANTS, OR RESTRICTIONS WHICH DO NOT APPEAR ON THE RECORDED SUBDI- VISION PLAT. UNDER NO CIRCUMSTANCES SHOULD ANY DATA HEREON BE USED FOR CONSTRUCTION OF FENCE LINES, OR FOR ESTABLISHING BOUND- ARY LINES. Date bye All work sti 0101, plan. A, .hall not be without first If done as shown on this ed plans andifid specification ged, q:oed or altered �ng a valid change order. SEWARD & ASSOCIATES LAND SURVEYING 694 SCALEt IL OF At DATE: 0 GRID: nw F8 V14' dol hogy� ��h�s I HEREBY CERTIFY -THAT I HAVE SURVEYED THE FOLLOWING DESCRIBED PROPERTY: AND �THAT NO CCROACH�TS !: ST EXCEPT AS INDICATED. IT IS THE RESPONSIBILITY OF THE OWNER TO DETERMINE THZ EXISTENCE OF ANY EASEMENTS, COVENANTS, OR RESTRICTIONS WHICH DO NOT APPEAR ON THE RECORDED SUBDI- VISION PLAT. UNDER NO CIRCUMSTANCES SHOULD ANY DATA HEREON BE USED FOR CONSTRUCTION OF FENCE LINES, OR FOR ESTABLISHING BOUND- ARY LINES. Date bye All work sti 0101, plan. A, .hall not be without first If done as shown on this ed plans andifid specification ged, q:oed or altered �ng a valid change order. SEWARD & ASSOCIATES LAND SURVEYING 694 SCALEt IL OF At DATE: r... ...or ....� GRID: ! •. Du.n. Mok S.w.. ... / �T¢ 1S-59 .r F8 ,_ DRAWN, oc� � s cu Com, f r. n..,+. •^' 12/12/2007 17:06 6882259 SULLIVAN PAGE 01/01 Certifieb �rtrtting Kog by Doc co. dw SULLIVAN WATER WELLS P.O. BOX 670272, CHUCIAK, ALASKA 99567 *TELEPHONE 888-2759 OWNEROFLAND: 645AI 0,4.j ADDRESS: ��,��,,�-• LEGAL DESCRIPTION: /?iQtNOCei�7 4 ! — DATE: C 1 6 PERMIT NUMBER:O 4C6:77- Date of Issue --Z. - say TAX IDENTIFICATION NUMBER: •-Li-131 -ZE) Is well located at approved permit location? 9-1rC Q No Method of Drilling:a rotary O cable toot Depth of well: qcc. Casing Type ,N 4-74- Wall Thickness a Inches DiameterA it inches, depth feet Liner Type: A) brcJE Casing Stickup Above Ground: a. feet Static Water Level: 43 feet Rocover Rate: d—q—auw 664 Method of T$Sting 1 iNY 1&-% 1 /Zrlrx [7 /nLu^-4 well Intake Opening Type: o open end Q -d en hole O Screened: Startfeet Stopped feet O Perforations Start—feet ffeet Stopped feet Grout Type: `1`f`Tw C-V�f �i�+7 � Volume -7:5ZQ S Depth: from feet, to -At) feet Well Disinfected Upon Completion? t§�O No Method of Disinfection: ir'6494:-JZ 1:76000/"14 Comments: Driller's Name 4-44-0. /Yj ATTENTION: It is the responsibility of the property owner to submit a copy of the well log to the proper authority. Municipality of Anchorage: Department of Health & Human Services and/or Department of Environmental Conservation. Matsu Borough: Department of Environmental Conservation. Do+elo►orot soMeoo W Wt*� 1WI eng /ohty DMda *U.k on-site Wotw s Weetewaqmpar ter hepro6700 I3trtetP 0. Iex 1266909960-4430Amh"a, AK 996660 a.atma &MU v urr,s PUMVI II'MIon Log 3Y3 7797.` WeU DAUms Padl NamMr. pem 6l hewt � r&ml1dnanesBoaNumaePQ�¢f •�V ILqallM•vtpllw Bhtt a Rhasayp.�.r Nana a Lvrd6h 8x,�"ial DIAJLJ,-'1 rr �ie �'�s 3 it Pou 7-)0996 fc 2`,�a AK ?957 Pomp loulka DTV Below Top ofWad Culop -� fi5 feet PemPMedi Meeehdam •Noma � ✓ remp •d p/4 . • /� romp6W • p • Ptdom Adeptor LLwhemrv'e Noma ,i d wpA)"ff Pldae Adepterlmta0oa Dr,",.( WeU DMdiM Cpn C6mpldlo@? R Ym U No Mdhed dDidehelom Cemmoen:t � Puwp g p�pp pro�tdp eco It P�Y Noma Attmgert 116 porgy W Wls INU Pmr+do a pwry McUtien fep bD8D.i1Llo 70 Lye of 2062 budlaloe MUNICIPALITY OF ANCHORAGE \� Development Services Department On -Site Water 6 Wastewater Program VVA 4700 South Bragaw Street P.O. Box 196650, Anchorage, AK 99519-6650 (907) 343-7904 ON-SITE WASTEWATER DISPOSAL SYSTEM / WATER SUPPLY PERMIT Initial Date Issued: May 05, 2006 Expiration Date: May 05, 2007 Permit Number: SW060077 Parcel ID: 050-131-70 Legal Description: BROADWATER HEIGHTS BLOCK 3 LOT 11 Design Engineer: 0848 EAGLE RIVER ENGINEERING SEI Site Address: 11715 BROADWATER DRIVE Owner Name: GORDON BANFIELD Lot Size: 31088 SO. FT. Owner Address: PO BOX 770996 Total Bedrooms: 3 Permit Bedrooms: 3 EAGLE RIVE. AK 99577 - This permit is for the construction of: ❑✓ Disposal Field ❑Q Septic Tank ❑ Holding Tank ❑ Privy All construction must be in accordance with: 1. The attached approved design. ❑✓ Private Well ❑ Water Storage 2. All requirements specked in Anchorage Municipal Code Chapters 15.55 and 15.65 and the State of Alaska Wastewater Disposal Regulations ( 18AAC72 ) and Drinking Water Regulations ( 18AAC80 ). 3, The engineer must notify DSD at least 2 hours prior to each inspection. Provide notification by calling (907) 343-7904 ( 24 hours ). ( Not required for a Water Supply Permit only). 4. From October 15 to April 15, a subsurface soil absorption system under construction during freezing weather must be either: A. Open and closed on the same day. B. Covered, sealed, and heated to prevent freezing. 5. The following special provisions. -THE UPPER SIX INCHES OF THE MOUND SYSTEM MUST CONSIST OF TOP SOIL AND THE MOUND MUST BE VEGETATED SUFFICIENTLY TO PREVENT EROSION. Received By: Date: Issued By: Dater 5/6 Municipality of Anchorage Development Services Department Building Safety Division On -Site Water and Wastewater Program 4700 Bragaw Street P.O. Box 196650 Anchorage, AK 99519-6650 www.muni.orglonsite (907)343-7904 ON-SITE SEPTICMELL PERMIT APPLICATION FOR A SINGLE FAMILY DWELLING Parcel I.D. 66Z-131-70 Property owner(s)�T-09- ate 7 Day phone X0 2 - -73--7X Mailing address ? d- BoX 77099 G� dLL J�_11L�x-r-�[� Zip Code 7"7 Site address 11 X95 �aoL l2�le y ty� Zip Code Legal description (Sub'd, Block & Lot) — QE alaTPd N E1r�F{ Ts L �l B Legal description (Township, Section & Range) Lot Size 3 fa 08p Sq. Ft. THIS APPLICATION IS FOR (®all that apply): Absorption Field Initial Septic Tank Upgrade Holding Tank ❑ Privy / Private Well [� Water Storage ❑ Number of Bedrooms _06- THIS APPLICATION IS AN: / Initial Upgrade ❑ Renewal ❑ I certify that the above information is correct. I further certify that this application is being made for a Single Fam�Dwellin�nd is in �cordance with applicable Municipal Codes. (Signature of property owner or authorized agent) Permit/Rush Fees: i^ 3 S� Waiver Fees: Date of Payment: Date of Payment: Receipt Number: ceipt Number: (Rev. 11/05) Eagle River Engineerings Services Christopher R. Wood, P.E. 10421 VFW RD. Suite 201 (907) 694-5195 tel Eagle River, AK 99577 (907) 694-3297 fax April 27, 2006 Dan Roth Manager, On -Site Services Municipality of Anchorage P.O. Box 196650 Anchorage, AK 99519 Re: Broadwater Heights Lot 11 Block 3 Narrative & Permit Application Dear Mr. Roth: Eagle River Engineering Services (ERES) was contacted by the owner of the property noted above to design a septic system and well to serve a new 3 bedroom house. Two test holes were excavated on the property by KND Engineers in 2002. The test holes indicated free -draining soils from 1 to 6 feet below ground surface, with bedrock at 6 feet. No water table was found in the monitor tubes on April 24, 2006. Even though the soil percolation test yielded a rate faster than 1 minute per inch, we are requesting that only a 1' layer of sand be imported. Visual observation of the soil gives ERES the impression of more than 50% sand if the large cobbles are not figured in. Additionally, a minimum of 1' of sand will be needed to get 6'separation to bedrock. This will give the sand layer very near 2' of depth on the downhill edge of the leachfield. The topography at the leachfield site and replacement site is a consistent 13%-15% toward the south. However, a steep embankment to the roadway occurs 35' from the edge of our proposed leachfield. Please see site plan for a visual depiction. By inspection, a theoretical line 2.5 feet above the effluent pipe invert at a 25% slope will not daylight before the steep slope occurs. The proposed 3 bedroom septic system and well will have very limited impact on adjacent properties for the following reasons: 1. The surrounding lots are well laid out, so there is room for wells, septic systems and alternate sites. 2. Immediate neighboring septic systems are all +20' distance, and no private (or community) wells within 100' of the proposed septic system. 3. Drainage will not be affected and is not a major consideration in our design. \2003\05-119serrtcNARRAnvE.DOc Installation of this 3 bedroom septic system and well, to our best available knowledge, will not adversely affect the wells or septic systems or reserve areas on adjacent lots. If you have any questions please call our office at 694-5195. Sincerely, EAGLE RIVER ENGINEERING SERVICES Christopher R. Wood, P.E. Principal \2003\05-119SEMCNARRATI V E.DOC i zir ,f I��S*. Eco+'p o� Q o n Z + zOS+ w a u W o^ 3 in 4(: '•.� O 0 V ri ^, o rz h Q WU w W W 0— +0Lu N X C s U Q W . ; Z �KAIevr Z Q J O U h ,OIC � ? �00 ~oY / ' O W N H n j co om w rnm 0� r • ro �p>> ry0 �O o n S W LLJLn R!1 O WE ��n3 p J as •00, 0, Lu() X�Q o LAJ N 41 A Z E 0ijI AL ♦ o_+ d • .O al •� A 0 , S�, o o -,c o • Z po WO yy� L�d"' K Q .-AV1J • .y Oy WU 3 oar • c W O . • �_�' a_ r •0'! ' •� ' • aio � .Of G t3 mc z O w 0 0 W O U K J 6 tr / • • • + w o m F: �� • P Q V N V Q Q~ J tZ8sov3 �nILn o`n,- i y oN��i�O wZ Snioyb' M s[ I w z N, -S- °¢�IIIID zz Eagle River Engineering Services Christopher R Wood, P.E. rog2t VFW Rd. Suite 2or (907) 694-5195 tel Eagle River, AK 99577 (907) 694-3297 fax SPECIFICATIONS FOR ON-SITE SEPTIC SYSTEM LEGAL: Broadwater Heights Lot I1 [dock 3 April 24, 2006 A. GENERAL 1. This well and septic plan is for a 3 bedroom single family residence only. 2. The drawing and or site plan shall be apart of this specification. 3. All materials and workmanship shall meet the Anchorage Department of Health and State Department of Environmental Conservation requirements. 4. All soil tests are advisory to the design and are to be verified or modified in the field by the engineer. 5. All excavations and depths are advisory and are to be verified in the field by the contractor to meet Municipality of Anchorage, Department of Environmental Conservation requirements. 6. It is the responsibility of the owner to obtain all necessary permits or easements and to locate any adjacent multi -family wells. 7. The excavation is to be exactly in the area shown on the site plan, any deviation requires engineer approval. 8. Any remaining open test hole excavations shall be filled and monitor tube removed. B. SEPTIC TANK 1. The sewer piping from the house shall be 4" PVC 3034 laid at 2% grade maximum — 1% minimum and insulated with 2" of burial foam if shallower than 3 R., with 2 ft. minimum. 2. Septic Tank shall be a minimum of 1,000 gallon tank of MOA approved construction, insulated, or place with 4' of soil cover, min. C. DRAINFIELD 1. PRIOR TO INSTALLATION OF THE DRAINFIELD, A LICENSED LAND SURVEYOR SHALL LOCATE AND MARK ALL LOT LINES WITHIN 20' OF THE PROPOSED PRIMARY DRAINFIELD LOCATION 2. The drainfield is to be placed as shown on the site plan. Contractor shall take extreme care ensure that 10'separtation distance is maintained between trenches, from the lot line, and from the house foundation. 3. The preparation for the drainfield shall be as follows: All organics shall be removed from the primary drainfield while leaving the free -draining soils beneath intact. Approximately V of sand shall be imported to achieve 6' clearance from bedrock and to level the drainfield area. Continuous heavy mil visqueen shall be placed on the downhill edge of the drainfield full depth from the bottom of the sand layer to the top of the sewer rock. 4. The bottom of the drainfield excavation shall be level, plus or minus 1.5", prior to placing gravel, whether on native soil or on imported leveled sand. 5. A V layer of sewer rock shall be placed over the filter sand layer. The 4" perforated drain pipe shall be on top of this P layer. Six more inches of sewer rock shall be placed next to and over the 4" distribution pipe as shown in the drainfield cross section. Temporary bracing of the downhill edge of the drainfield may be required to retain the sewer rock prior to backfilling. \\Ercs\DOCS\WPDOCS\2006\05.119-4brdrrinfield- spcc.doc � � z LO U Ld Q W mo LLJ }- ry O �O O w _► (/) O cr, z Q a_ w ;z f -w < CD F -- O �\ < (f) o \5; W o. LL- z CO L1 .0 z •. _ (, •000. O ocnz O � CL O z U : �-. W_ L.l J 0 �. 0. LL- jl O CL III N / vi C"q CL LLI aLd M / U Q N D Q W 4, cc \Z U M W O Ld ItI O ko �- CN J b / N Z coM C k r' � o V4 O V4 v) 0 VOVO W�YW� CL Eagle River Engineering Services Christopher R. Wood, P.E. Continued: 6. The drainfield gravel shall be covered with typar fabric material. 7. Soil or a combination of soil and extruded board insulation to at depth of 3' or equivalent is to be placed over the lcachfield. 8. The area over the drainficld is to be finish graded or mounded to prevent ponding of surface water runoff. 9. The downhill edge of the drainficld must capped with organic rich soil and may not exceed a slope of 3' horizontal to V vertical. 10. The septic tank and Icachficld must not be closer than 100' to any existing private well, 150' to any Class "C" well, or 200 feet to any community well. RECOMMENDED LEACHFIELD DIMENSIONS TOTAL DEPTH = 1' GRAVEL DEPTH = 1' under pipe, 2" over pipe 0.5' total) DRAINFIELD LENGTH =66' DRAINFIELD WIDTH = 5' SOIL RATING = 1.2 GPD1W BEDROOM CAPACITY= 3 total SEPTIC TANK = 1,000 gallons min. Twenty-four (24) hours notice required for all Inspections. \\Eros\DOCS\WPDOCS\2006\05-119.4brdrainfield- spec.doe M LJ ENGINEERING 20441 PTARMIGAN BLVD. EAGLE RIVER, AK 99577-8736 CE 7115 SOILS PERCOLATION TEST Performed for. Bonnie King _Date Performed: OS/29/02 - Project Broadwater Heil;hts, Lot 11, Block 3 TEST HOLE # 2002-01 19 - HOLE PRESOAKED 20- PRIOR TO TEST SEE ATTACHED SITE PLAN FOR HOLE LOCATION Was Ground water encountered? NO What depth? NA Depth to water after monitoring? NA Date? 09/05/02 Reading Date Gross Time Net Time r r.CW w/ organics 9/5/02 1A0 - 6' - loose,damp, brown/gray, sandy ,r�.. gravel wl cobbles 6" 3 4 Fractured Bedrock A2. a t a 4 19 - HOLE PRESOAKED 20- PRIOR TO TEST SEE ATTACHED SITE PLAN FOR HOLE LOCATION Was Ground water encountered? NO What depth? NA Depth to water after monitoring? NA Date? 09/05/02 Reading Date Gross Time Net Time Depth to WaMr Net Drop 1 9/5/02 1A0 - 6' - 2 1# 5 min dry 6" 3 • 106 - 6 4 1:11 5 min dry 6" 5 1:12 - 6" - 6 1:17 5 min dry 6" 7 1:18 - 6" - 8 123 1 5 min dry 6• 9 124 - 6" - 10 129 5 min dry. 6" 11 ' 130 - v - 12 135 5 min dry6" • Water Added Percolation Rate < 1(min/in) Perc Hole Diameter 6" Test Run Between 2 feet and 3 feet 1, Kenneth M. Duffus, certify that this test was performed in accordance with all State and Municipal guidelines in effect on this date. r<,11V LJ ENGINEERING 20441 PTARWGAN BLVD. FAr:T.F RIVER. AK 99577-8' SOILS PERCOLATION TEST Performed for. Bonnie King Date Performed: 08/29/02 Proj Broadwater Heights Lot 11 Block 3 TEST HOLE tt 2002-01 Depth 7- 8- 9- 10- 11- 12- 13- 14- 15- 16- 17- 18- 19- 20- ORG — red/brown overburden w/ organics f' GPISP—loose, damp, brown/gray, sandy gravel w/ cobbles to 1' B.O.H--BEDROCK -refusal HOLE PRESOAKED PRIOR TO TEST SEE ATTACHED SITE PLAN FOR HOLE LOCATION Was Ground waterencountered? NO What depth? NA Depth to water after monitoring? NA Date? 09/05/02 Reading Date Gross Time Net Time Depth to Water Net Drop 1 9/5/02 190 - 6' - 2 1.05 5 min dry 6" 3 • 196 - 6" 4 1:11 5 min dry 6' 5 • 1:12 - 6" - 6 1:17 5 min dry 6" 7 • 1:18 - 6" - 8 123 5 min dry 6- 9 • 124 - 6" - 10 1:29 5 min dry 6" • 130 - 6' - 5 min d 6' E12J1.35 Water Added Percolation Rate <1(min/in) Perc Hole Diameter V' Test Run Between 2 feet and 3 feet 1, Kenneth M. Duffus, certify that this test was performed In accordance with all State and Municipal guidelines in effect on this date. EAGLE RIVER ENGINEERING SERVICES P.O. Box 773294 Eagle River, Alaska 99577 (907) 6944195 ERES Project No.: 05-119 Calculated By: CW Date: 04272006 Legal: Broadwater Heights Lot 11 Blk 3 TEST HOLE 1 Single Family 3 Bedroom Dwelling Shallow Trench Subsurface Wastewater Disposal Field Water use at 150 gallons per bedroom = 450 gallons Percolation rate = 1 minutes per Inch Wastewater application rate = 1.2 gallons per day per square foot Required absorption area = 375 square feet Trench width (W) = 5 feet Gravel depth (D) = 1 feet Required length = Shallow trench factor • Required absorption area / W Shallow trench factor = (W + 2) / (W + 1 +2 D) Shallow trench factor = 0.88 Total Excavation Depth = -0.5 feet Required length = 66 feet 05-119 DRAINFIELDCALC.Xls 12:55 PM04272006