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HomeMy WebLinkAboutRIVER VIEW ESTATES BLK 5 LT 13Riverview Estates Block 5 Lot 13 #050-792-20 MUNICIPALITY OF ANCHORAGE On -Site Water & Wastewater Program PO Box 196650 4700 Elmore Road Anchorage, Alaska 99519-6650 Phone: (907) 343-7904 Fax: (907) 343-7997 hftp://www.muni.org/onsite On -Site Wastewater Disposal System Permit Permit Number: OSP251118 Work Type: SepticTank Upgrade Tax Code Number: 05079220000 Site Legal Address: RIVER VIEWESTATES BLK 5 LT 13 G:0357 Site Mailing Address: 21016 RIVER PARK DR, Eagle River Owner: PETERSON RICHARD A & JULIE A Design Engineer: FIRST WATER CONSULTING This permit is for the construction of: Effective Date: Expiration Date: °, , S r; f t)epartltle"rtt Lot Size in Sq Ft Total Bedrooms: 5/29/2025 5/29/2026 40000 Q Disposal Field 0 Septic Tank ❑ Holding Tank ❑ Privy ❑ Private Well ❑ Water Storage All construction shall be in accordance with: 1. The attached approved design. 2. All requirements specified 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 wastewater code requires inspections during the installation. The engineer shall notify the Development Services Department per AMC 15.65. Provide notification by calling (907) 343-7904 (24/7). 4. From October 15 to April 15, a subsurface soil absorption system under construction during freezing weather shall be either: a. Opened and Closed on the same day, or b. Covered, sealed, and heated to prevent freezing Special Provisions: The bed installed in 1998 is only sized for 3 bedrooms. It can't be tested in the future as a 4 bedroom system for a COSA. Received By: F �vC Date: Issued By: --- Date: -2 s) S MUNICIPALITY OF ANCHORAGE Development Services Department Phone: 907-343-7904 On -Site Water & Wastewater Section t ON -SITE SEPTIC/WELL PERMIT APPLICATION Parcel I.D. 050-792-20 Property owner(s) RICHARD & JULIE PETERSON Day phone _ Mailing address 21016 RIVER PARK DRIVE EAGLE RIVER, ALASKA 99577 Site address 21016 RIVER PARK DRIVE EAGLE RIVER, ALASKA 99577 Legal description RIVER VIEW ESTATES BLOCK 5 LOT 13 Number of Bedrooms Engineering Firm FIRST WATER CONSULTING Building Permit Number Not Applicable FNI APPLICATION IS FOR: APPLICATION IS AN: (0 all that apply) Absorption Field Initial El Septic Tank Q Upgrade Holding Tank ❑ Renewal ❑ Privy ❑ Well ❑ THIS APPLICATION INCLUDES A WAIVER REQUEST FOR: Distance: Permit/Rush Fees: 22S Waiver Fees: Date of Payment: Date of Payment: Permit No. QP2SIII Waiver No. 13030 Sues Way, Anchorage, AK 99516 907-350-9566 / firstwaterAK@gmail.com ! !! May 28, 2025 Municipalities of Anchorage On-Site Water & Wastewater Program 4700 Elmore Road Anchorage, AK 99507 RE: SEPTIC SYSTEM UPGRADE PERMIT LEGAL: RIVER VIEW ESTATES BLOCK 5, LOT 13 The owner has requested now that we obtain a septic permit to upgrade to a 4-bedroom septic system on the above referenced lot. Due to site observations, the recent test hole, record site & area documents, we propose to install a 1500-gallon HDPE deep-burial STEP septic tank per the attached design to serve the existing 4-bedroom residence. STEP septic tank anchoring may be required due to shallow groundwater per the MOA on-site file. The design is based on the recent test hole conducted on May 20, 2025. Groundwater was observed at test hole excavation and at monitoring. Please see attached test hole TH25-1. The slopes are moderate at 0-5% at the proposed upgrade location. As stated, if shallow groundwater is encountered during installation an epoxy coated steel septic tank or other action may be required. The lot and area are served by private water and any encroaching wells, easements, … must be staked prior to construction. The design will not impact any of the neighboring properties. Please contact us if you have any questions. Sincerely, Curtis Huffman, P.E. Municipality of Anchorage On-site Water and Wastewater REVIEWED FOR CODE COMPLIANCE OSP251118, Curtis Townsend, 05/29/25 FIRST WATER CONSULTING DESIGN CALCS: NO WELLS WITHIN 100' OF PROPOSED SEPTIC SYSTEM. NO SLOPES >25% WITHIN 50' OF PROPOSED FIELD. RIVER VIEW ESTATES BLOCK 5, LOT 13 Municipality of Anchorage On-site Water and Wastewater REVIEWED FOR CODE COMPLIANCE OSP251118, Curtis Townsend, 05/29/25 FIRST WATER CONSULTING RIVER VIEW ESTATES BLOCK 5, LOT 13 DESIGN DETAILS: Municipality of Anchorage On-site Water and Wastewater REVIEWED FOR CODE COMPLIANCE OSP251118, Curtis Townsend, 05/29/25 3030 Sues Way - Anchorage, Alaska 99516 Tel. 907-350-9566 firstwaterAK@gmail.com SOILS LOG - PERCOLATION TEST LEGAL : RIVER VIEW ESTATES B5, L13 PERFORMED BY: FWC - I CURTIS HUFFMAN CERTIFY THAT THIS TEST WAS PERFORMED IN ACCORDANCE WITH ALL STATE & MUNICIPAL GUIDELINES IN EFFECT ON THIS DATE: 5/28/2025 DEPTH FEET OG SOILS 1 2 ORG/OL w/ FILL 3 4 5 6 GM/gw-sw Rocky - boulders 7 8 9 10 11 BOH 12 13 14 15 16 17 18 19 20 Reading Date Gross Time Net Time Depth to Water Net Drop 5/20/25 10 min 6” 4 9/16” “ 6” 4 7/16” “ 6” 4 6/16” “ 6” 4 4/16” “ 6” 4 4/16” “ 6” 4 4/16” PERCOLATION RATE 2 (MIN / INCH) TEST RUN BEWTWEEN 4 & 5 FT PERC HOLE DIAMETER 6” PRE-SOAKED PRIOR TO TEST & ALL READINGS TO THE 1/16TH. GROUND WATER ENCOUNTERED: YES IF YES, AT WHAT DEPTH: 10’ DEPTH TO WATER AT MONITORING: 9.8’ DATE: 5/28/2025 TESTHOLE # 25-1 DATE PERFORMED: 5/20/25 SEE SITE PLAN FOR SLOPE & LOCATION COMMENTS: VERIFY GROUNDWATER MT AT TIME OF CONSTRUCTION PERFORMED FOR: RICHARD & JULIE PETERSON 05/28/25 Municipality of Anchorage On-site Water and Wastewater REVIEWED FOR CODE COMPLIANCE OSP251118, Curtis Townsend, 05/29/25 RIVER PARK DRIVE w 0 0 N 89'58'50"E 145.00' 9.4' Z 0 0 0 Lot 14 0 N U1 Lot 16 10' UTILITY EASEMENT Lot 13 40,000 s.f. 24.3' o GARAGE p N 24.3' SEPTIC PIPES ASPHALT 0.:. PAVEMENT 1.5' CANT 21. 4 38.3' v 19.6' 12.2' — L=31.42' R=20.00' T O O 0 M cn 00 rn I R W, /M J M " 20.0' 3 STORY I RESIDENCE M 25.0' I E DECK 00 40.2' I \ I . 8.0' x 20.4' CANT \ GRAVEL 24'2• 4.0' x 19.9' CANT / L=36.14' \ 4/R=50.00'Cn 28.5' 242' WELL WOODEN FENCE . •A L iD _- S 87'44'58"W 145.14' „apt \ \ z9-1 ' L=276.08' I R=50.00' „J PLOT PLAN ___ AS BUILT _X_ SCALE _1__= 40__ GRID _ SW 357Project No. J24_2541A2___ P.O. Box 210005 Lang & Associates, inc. Anchorage, Alaska 99521-0005 oo D0lZ zc�Z� (907) 522-6476 �4� F q°�n04 Professional Land Surveyors jonathan®langsurvey.com o� ken®langsurvey.com OvP '9s�oo I hereby certify that I have surveyed the following described property: �� �O LOT 13, BLOCK 5, RIVERVIEW ESTATES SUBDIVISION (Plat No. 79-5) Q 4 Anchorage Recording District, Alaska, and that the improvements situated thereon are 0"" "" """ '•••"•.... within the property lines and do not encroach onto the property adjacent thereto, that P no Improvements on the property lying adjacent thereto encroach on the surveyed A , • • • • • • • • • premises and that there are no roadways, transmission lines or other visible JONAT . C.. .LAIVG..• o easements on said property except as indicated hereon. QQ �'�, H O Dated this the �-� N°`Z� �- LS-9944. • ' yJ p� Day of _ _Z at Anchorage, Alaska 40 �vo It is the responsibility of the owner to determine the existence of any easements, 4�OROFfSSIONA�- OPOOooP� covenants, or restrictions which do not appear on the recorded subdivision plat. State of Alaska AECC963 Municipality of Anchorage Development Services Department Budding Safety DMslon On-Site Water and W~t~ter program, 4700 S. Bragaw St. P.O. Fox 196650 .N~chorage, AK 99519-6650 e,v,~w.d, anchomge.ak, us (SO'/) 343-7~04 0 Page ON-SITE WASTEWATER DISPOSAL SYSTEM AND/OR WELL INSPECTION REPORT WastewaterSystem: ~ New [-I Upgrade LEGAL DESCRIPTION ABSORPTION FIELD 0,7o.., '=~"~': 1.5,, Well: ~ New c ~r~..~ (P~*. & B. c~ F~ I FO T~ [] Upgrade SEPARATION DISTANCES Ft. TANK I~Sep0c [] Holding [] S.T.E.P. [] Other. Septic Absorption LiE Holding Tank Field StaSon Tank I~'+ 33~ 3~' , ' BENCH MARK , 1~ E~gl. River L~p Road, No.~ / ~ ~ ~ Inspections performed ~Y:~le River, A~-'~' ~ D=tes. 1.a ~' ~ _~ ~, ~' [13q8 ~ Developmem Se~iee~ Depament ~pproval PERMIT No. SW970374 PAGE 2 OF 3 Munibpa�lt of Anchorage DEPARTMENT OF HEALTH AND HUMAN SERVICES ENVIRONMENTAL SERVICES DIVISION P 0 Box 196650 • Anchorage, Alaska 99519-6650 • Telephone; 343-4744 ON-SITE WASTEWATER DISPOSAL SYSTEM AND/OR WELL INSPECTION REPORT LEGAL. LOT 13, BLOCK 5, RIVERVIEW ESTATES P.I.D. NO. 050-792-20 - -- - - - ------------- -- --- -RIVER PARK DRIVE RIVER 10' UTILITY EASEMENT I I vL ALT. SITE �� TH#2 SHED MT2 col I W I I CO2 MT1 I NEW BED DBL1 & DBL2 NEW 1000 GALLON ST2 I SEPTIC TANK 1—� N ♦TH#1 ST1 I TBM B A I NEW 3 BEDROOM FCO I I I HOUSE I �SCAL DECK 1" 4d 100, US t e ROBERT C. COWAN r �� CE - 8601 jw . PERMIT NO. SW970374 PAGE 3 OF 3 Munibpa('t of Anchorage DEPARTMENT OF HEALTH AND HUMAN SERVICES ENVIRONMENTAL SERVICES DIVISION P.D. Box 196650 *Anchorage, Alaska 99519-6650 * Telephone: 343-4744 ON-SITE WASTEWATER DISPOSAL SYSTEM AND/OR WELL INSPECTION REPORT LEGAL LOT 13, BLOCK 5, RIVERVIEW ESTATES 97.6' 95.5' 97.4 CO1 MT1 MT2 CO2 FINAL GRADEd+ P.I.D. NO. 050-792-20 FINAL GRADE NEW 1000 GAL SEPTIC TANK INSULATION ORIGINAL GRADE INSULATION 95.3' A WATER FOUND @ S5.7' 8"x.7' B.O.H. N. T. S. _A. A Q FCO 1 1 .0' 64.5' ST1 19.0' 64.5' ST2 25.5' 66.0' DBL1 30.0' 67.0' DBL2 31.0' 67.5' C01 60.5' 79.0' MT 49.5' 72.0' CO2 62.0' 47.5' MT2 70.5' INSULATION 95.3' A WATER FOUND @ S5.7' 8"x.7' B.O.H. N. T. S. by SULLIYAN OXYER WELLS P.O. BO)( 670272, CHUGIAK, ALASKA 99567 · TELEPHONE 685-2759 OWNER BeRt= HOLE DATA Al TAXI Is well Method De~ Casir Diar Liner 'f Casir Staff( Pure Well r~ ur L.,~r~u ~~,~._~_..~ -- DEPTH . DESCRIPTION ~ IT NUMBER~'+~ 3 ~Date of Issue~-. I~ - ~+ ~DENTIFICATION NUMBER O~0 ~W~ located at approved permit location,. ~ No ~ d of Drilling: ~ ~ sable tool ~ Type ~Z. Wall Thickness., ~.~0 inches ~ ~ter_~¢t .inches, depth_~ ~ ~ II feet type: ~6~ ~ g Stickup Above Ground: ~ feet Water Level (from ground level): ~ ~ feet ing level: feet aEer hfs, pumping -- .gpm /er Rate:. ~ ~pm )d ofTestlng:_ ~).~ . ntake Opening Type: ~ Open End ~en Hots ;reened; Stad feet Stopped Jest }dorations Stad feet Stopped feet :Type: ~'~ ~F~ _Volume ._ ~ ~ A & ~ ~: from~ _feet, to feet )IntaKe Depth: feet ) Size _hp Brand Name Disinfected Upon Completion? ~ ~ No od of Disinfection: ~ ~/~aRt~,~ ~ ~ '. ~ments~ Driller's Name _ Grout T Dept~ Pure Puml: WelI I ')C T '1 _ '~-,[- FJ(.%~J'lth & I-tu~lan Ser~'ioea ATTENTION: it is the responsibility of the property owner to submit a copy of the well log to the proper authority. Municipality of Anchorage; Depertment of Health & Human Services and/or Department of Environmental Conservation. MatSu Borough: Department of Environmental Consewation. ROBFRT C. COWAN, RE. ROBI:-RT A. SHAFER, RE. HEALTH AUTHORICf APPROVALS ENGINEERING Sf UDIES AND REPORTS WELL INSPECTION & FLOWTEST ROAD DESIGN SOILTEST Date: CIVIL ENGINEERS (907) 694-2979 FAX (907) 694-1211 Municipality of Anchorage DEPARTMENT OF HEALTH AND HUMAN SERVICES 825 L Street P.O. Box 196650 Anchorage, Alaska 99519-6650 RECEIVI !D DEC 24 1998 Mumclpahty u~ Ancr~o~ago Dept. Health & Human Services The septic inspections for Lhe referenced property were performed on ~/~/q ~ and ~7,5/~'~ . Prior to submitting the On-site Wastewater Disposal System and/or Well ~nspection Report we are waiting for the ~n4r~/ ~, m to be completed. ~u~v~ If we may be of further servlee please oonLacL us. Sincerely, Robert C. Cowan, P.E. 17034 NORTH EAGLE RIVER LOOP · SUITE 204 · EAGLE RIVER, ALASKA 99577 /JO C PAGE 1 OF 1 MUNICIPALITY OF ANCHORAGE DEPARTMENT OF HEALTH AND HUMAN SERVICES P.O. BOX 196650, 825 "L" STREET, ROOM 502 ANCHORAGE, ALAS[CA 99519-6650 ON-SITE WELL AND WASTEWATER DISPOSAL SYSTEM PERMIT PERMIT NUMBER:SW970374 DESIGN ENGINEER:S & S ENGINEERING OWNER NANE:PETERSON RICHARD A & JULIE A OWNER ADDRESS:P.O. BOX 242233 ANCHORAGE, ALASKA 99524 DATE ISSUED:10/17/97 EXPIRATION DATE:10/17/98 PARCEL ID:05079220 LEGAL DESCRIPTION: RIVER VIEW ESTATES BLK 5 LT 13 LOT SIZE: 40000 (SQ. FT.) NUMBER OF BEDROOMS: 3 THIS PERMIT: 3 THIS PERMIT IS FOR THE CONSTRUCTION OF: DISPOSAL FIELD /SEPTIC TANK / WELL SYSTEM ALL CONSTRUCTION MUST BE IN ACCORDANCE WITH: 1. THE ATTACHED APPROVED DESIGN. 2. ALL REQUIREMENTS SPECIFIED IN ANCHORAGE MUNICIPAL CODE CHAPTERS 15.55 AND 15.65 AND THE STATE OF ALASKA WASTEWATER DISPOSAL REGULATIONS (18A3~C72) AND DRINKING WATER REGULATIONS (18A-AC80). 3. THE ENGINEER MUST NOTIFY DHHS AT LEAST 2 HOURS PRIOR TO EACH INSPECTION. PROVIDE NOTIFICATION BY CALLING 343-4744 ( 24 HOURS ) (NOT REQUIRED FOR WELL ONLY PERMIT) 4. FROM OCTOBER 15 TO APRIL 15 A SUBSURFACE SOIL ABSORPTION SYSTEM UNDER CONSTRUCTION DURING FREEZING WEATHER MUST BE EITHER: A. OPENED AND CLOSED ON THE SAME DAY B. COVERED, SEALED AND HEATED TO PREVENT FREEZING 5. THE FOLLOWING SPECIAL PROVISIONS. SPECIAL PROVISIONS: THE SAND USED IN THE FILTER LAYER MUST BE A CLEAN COARSE SAND WITH 4% OR LESS PASSING THE #100 SIEVE AND 2% OR LESS PASSING THE #200 SIEVE. A SIEVE ANALYSIS MUST BE PROVIDED ON THE SAND USED OR OBTAINED FROM AN APPROVED SOURCE. ISSUED BY:~Q/~/ ~ ~~ DATE: DATE, ROBERT C. COWAN, RE. ROBERT A. SHAFER, RE. SEWER&WATER MAIN EXTENSIONS SEWER & WATER INSPECTION ENGINEERING STUD]ES AND REPORTS WELL INSPECTION &FLOWTEST SITE PLANS ROAI) DESIGN SOILTEST PERCOLATION TEST STRUCTURAl & MECHANICAL INSPECTIONS July 18, 1997 CIVIL ENGINEERS (907) 694-2979 FAX (907) 694-1211 MUNICIPALITY OF ANCHORAGE Department of Health and Human Services P.O. Box 196650 Anchorage, AK. 99519 REFERENCE: Lot 13, Block 5, Riverview Estates Subdivision Request you issne a permit to drill a well and install a septic system to serve the proposed fora' bedroom honse on the referenced property. Test holes were excavated and percolation tests performed. The approximate location of the test holes are located on the attached site plan. At the time of excavation water was encountered at ~'~ feet in test hole #1 and in test hole #2, and after seven day ground water mod~ofing water was found at ~o'--feet and,Of~/,~ respectively. Tiffs property has enough area for a future septic upgrade which can be seen on the attached site plan. We do not anticipate any adverse effects on neighboring wells, septic systems or drainage patterns by the h~stallation of fire proposed septic system. If you require additional information, please contact us. Sincerely, Robert C. Cowan, P.E. RCC/mg Enclosure 17034 NORTH EAGLE RIVER LOOP · SUITE! 204 · EAGLE RIVER, ALASKA 99577 1"=:60' 8~ALE SITE-PLAN DESIGN WELL RADIUS C) WILDWATER CII~,CLE o? bout: © c.n c° 4x ~ .-4¼ N.T.S. 8GALE DESIGN I, DETAIL ig U PERFORMED FOR: LEGAL DESCRIPTION: 1 2 3 4 5 6 7 8 9- 11 Municipality of Anchorage DEPARTMENT OF HEAL'FH & HUMAN SERVICES 825 "L" Street, Anchorage, Alaska 99502-0650 SOILS LOG -- PERCOLATION TEST 13 14 15 16 17 18 19 2O ~ . ...~- Township, Range, Section: SLOPE SITE PLAN WAS GROUND WATER j~ ENCOUNTERED? S IF YES, AT WHAT ~'"/ ~ DEPTH? p E Depth to Walor Alter/./,..,.,,.---~. Jo ~. 9/? Monitoring? I' Dato: Gross Net Depth to Net Reading Date Time Time Water Drop PERCOLATION RATE __ TEST RUN BETWEEN .. (l~mnute$/mch) PERC HOLE DIAMETER __ COMMENTS S & S ENGINEERING .~.~/~.~,~?.,7~/_~,..~/~ ~ ¢' PERFORMED BY: ~ _70~4-F.a~el~..~~ I .... CERTIFY THAT THIS '[EST WAS PERFORMED iN 72-008 (Rev. 4/85) PERFORMED FOR: LEGAl_ DESCRIPTION: "~PT 3 5- 9- 13 14 17 20 Municipality of Anchorage DEPARTMENT OF NEALTH & HUMAN SERVICES 825 "L' Street, Anchorage, Alaska 99502-0650 SOILS LOG -- PEFICOLATION TEST Township, Range, Section: WAS GROUND WATER ENCOUNTERED? SLOPE SITE PLAN IF YES, AT WHAT DEPTH? Gross Net Depth to Net Reading Date Time Time Water Drop PERCOLATION RATE --,/ (minutes/inch) PERC HOLE DIAMETER TEST RUN GETWEEN ~ __FTAND ~ __FT COMMENTS PERFORMED BY: $ & $ ENGINEERING , 17034 =~agfe Rive~ L°°~J~S-- IN EFFECT ON THiS ACCORDANCE W ~~ - 72-008 (R~v. 4/85) CERTIFY THAT THIS TEST WAS PERFORMED IN DATE: ROBERT C. COWAN, P.E. SEWER&WATER INSPECTION ENGINEERING STUDIES ANO REPORTS WELL INSPECTION & FLOWTEST ROAD DESIGN SOILTEST PERCOLATION TEST STRUCTURAL & MECHANiCAl INSPECTIONS ON-SITE WASTEWATER DISPOSAL SYSTEM CONSTRUCTION PRAC~I3CES and MATERIAL SPECIFICATIONS CIVIL ENGINEERS (907) 694-2979 FAX (907) 694-1211 REFERENCE: Lot 13, Block 5, Riverview Estates Subdivision August 27, 1997 GENERAL: The scope of this project includes the installation of a 1000 gallon septic tank and an absorption bed to serve the proposed three bedroom residence located on the referenced property. Construction shall be in accordance with the approved site plan and design drawings, Municipal permit with any special provisions or conditions, and all applicable State and Municipal Wastewater Disposal Regulations. The contractor shall be responsible for obtaining any necessary underground utility locates. Unless specifically agreed otherwise, the property owner shall be responsible fbr final grading areas subsequenfiy depressed from soil settling. On all leachfield mound systems, the property owner shall be responsible for ensuring a satisfactory vegetation growth over the mounded area. Contractors installing wastewater disposal systems must be certified by the Municipal Health Department for system installations. Owners installing their own systems nmst also receive prior approval fi~om the Municipal Health Department. SEPTIC TANK INSTALLATION: A septic tank is to be constructed by a certified septic tank manufacturer. Construction shall include two 4" cleanouts for pumping access. The septic tank shall be sufficiently bedded to prevent settling or shifting of the tank. All standpipes on the septic tank shall extend a minimum of 12 inches above final grade. 4. Septic tanks installed with less than 4 ft. of cover shall be insulated. 17034 NORTH EAGLE RIVER LOOP · SUITE 204 · EAGLE RIVER, ALASKA 99577 Page Two Lot 13, Block 5, Riverview Estates Subdivision August 27, 1997 A foundation cleanout shall be installed one to four feet fi'om the building foundation. In the line between the tank and the leachfield them shall be two adjacent cleanouts (unless an effluent pumping system exists within the septic tank). These cleanouts shall be located on undisturbed soil not mom than 10 ft. from the tank. The fit'st cleanout, hi line, shall be to clean toward the leachfield. The second cleanout shall be to clean toward the septic tank. Final grading over the septic tank shall be such that a positive slope exists away from the septic tank. LEACH]FIELD BED INSTAL[,ATION: Excavate the proposed Bed Area to the depth shown on the design. The bottom of the excavation shall be within 2 inches of level. If the bottom of the excavation becomes smem'ed, it must be raked or scratclled (ruffed-up) before gravel or sand placement. Ifa sand layer is requked, place sand over entire excavation to the required depth shown on the design. The top of the sand layer must be within 2 inches of level. Sewer rock shall be placed uniformly tl)roughout the entire bed. Perforated distribution pipe must be installed level with perforations down. Gravel depth below the perforated pipe shall be a minimum of six (6) inches. Gravel depth above the perforated pipe shall be a minimum of two (2) inches. The total gravel depth throughout the entire bed shall be a minimum of twelve (12) inches. The perforated distribution pipes must be no more than six feet apart. The distance between the outermost perforated distribution pipes and the sidewall of the absorption bed must be no more than throe feet. Silt ban'ier material mnst be installed between the final gravel layer and the native soil backfill. Ensure the silt barrier covers the entire gravel surface before placing bacld'~ll. Monitor tubes shall be of four (4) inch diameter, installed at the locations shown on the design, and extend a mirfiim~m of 12 inches above final grade. The portion of the monitoriug tube extending through the gravel depth shall be perforated six (6) inches below the bottom of the horizontal distribution lines. The monitoring tube should not extend below the bottom of the gravel surface. Backfill over the final gravel layer mt~st not be less than twenty-four (24) inches. Insnlation must be installed when the backfill depth is less than thirty-six (36) inches. The finished grade over the bed must be mounded to prevent the formation of a depression after settling. Page Three Lot 13, Block 5, Riverview Estates Subdivision August 27, 1997 MOUND SYSTEM INSTALLATION: 1. Any peat or organic matter must be removed from the elevated mound site. The bottom of the basal bed area as well as the top of the sand filter is to be within two inches of level. The distribution piping is to be ofPVC (ASTM D3034 or equal). All joints are to be solvent cemented. 4. The side slopes of the top layer of the mound system must not be steeper than 33% (3:1). The top of the mound shall be covered with a minimum of 6 inches of topsoil and vegetated sufficiently to prevent erosion. The distribution pipes are to be embedded in sewer rock. Care should be taken to bacl~ll in such a way as to prevent damage to the piping system. Silt barrier material must be installed between the final gravel layer and the native soil backfill. Ensure the silt ban'ier covers the entire gravel smi'ace before placing bat!dill. Backfill over the final gravel layer must not be less than twenty-four (24) inches. Insulation must be installed when the backfill depth is less than thirty-six (36) inches. MINIMUM MATERIAL SPECllTICATIONS: Any septic tank proposed for installation must be constructed by a Municipally approved septic tank manufacturer. The following pipe materials are approved for use in septic system installations in the Municipality of Anchorage: _T'_'_yp e of Pip_e Perforated Solid Cast ken Yes Yes ASTM D3034 (PVC) Yes Yes ASTM F810 (HDPE) Yes No ASTM D2662 (ABS) Yes Yes Use ora type of pipe other than listed above must be approved by the inspecting engineer. Page Four Lot 13, Block 5, Rive~'view Estates Subdivision August 27, 1997 Inmlation shall be at least 2" thick extruded direct burial polystyrene (Dow Chemical Company Styrofoam HI or equal). Septic tank inlets and outlets shall be fitted with watertight couplings (Cautder, Feruco, or equal). A permeable nontoxic silt barrier (Typar 3401, Mirafi 140N, or equal) must be installed between the final leachfield gravel layer and the native soil bacl~ll. All leachfield gravel (sewer rock) shall be 0.5"-2.5" screened gravel with less than 3% passing the #200 sieve. When sand is being used as a filter material, its gradation specifications must conform to cmrent M.O.A. or D.E.C. requirements. INSPECTIONS: Typically there will be a minimum of three (3) inspections requh'ed during the installation of the wastewater disposal system. These inspections will occur as follows: The first inspection must be conducted after the excavation of ditches, pits, trenches, or beds and before tile installation of any gravel. A septic tank may be set in place, but may not be baclc[illed before this inspection. The second inspection must be conducted after the placement of tile silt barrier, gravel, distribution lines, standpipes, cleanouts, and insulation, but before the placement of any other baclO~ll. 3. The final inspection is to occur upon final grading of the property. Often there will be more than these 3 inspections required. Especially with the installation of multiple trenches, sand filters, pressurized distribution systems, etc. Thus, the inspecting engineer is to be contacted at least 24 hours prior to the start of construction. If necessary, a pre.-constraction meeting will take place on-site. The inspecting engineer will not coordinate, direct or control in any way the contractors actMties. The owner shall contract with the contractor to perform the work outlined in these specifications and pimps and in accordance with the attached M.O.A. permit. There will be no contractual arrangement existing between the contractor and S & S Engineering. S & S Engineering shall be the owners representative and will inspect the work as stated above to document the contractors activities. Final acceptance of the contractors work rests with the owner and the M.O.A. Page Five Lot 13, Block 5, Riverv/ew Estates Subdivision August 27, 1997 S & S Engineering shall have no liability to the owner or to others for acts or omissions of the contractor or any other persons performing work on tiffs project or the failure of the contractor to can'y out the work in accordance with these construction documents. S & S Engineering's inspecting engineer will not be responsible for the construction means, methods, techniques, sequence, procedures or the safety precautions incident to this project. COM'RACTOR/INSTALLER