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HomeMy WebLinkAboutBEACON HILL ESTATES LOT 11AOnsite File �. 5 Municipality of Anchorage On -Site Water and Wastewater Program • (907) 343-7904 Page 1 of 3 ON-SITE WASTEWATER INSPECTION REPORT Permit Number: OSP191017 PID Number: 015-092-91 Dwelling: ❑■ Single Family (SF) ❑ Duplex (D) ❑ Multiple (SF and/or D) Project: ❑■ New ❑ Upgrade Name: Eric Trevithick ABSORPTION FIELD ❑t Deep Trench ❑ Shallow Trench ❑ Bed ❑ Mound Address 7512 Beacon Hill Dr, Anchorage, AK ❑ Other Phone Number of Bedrooms Soil Rating depth from original grade 301-5359 4 JTotal 0.8 GPD/SF 12.0 / 11.7 Ft. LEGAL DESCRIPTION Depth to pipe invert from original grade 3.8/3.7 Ft. Gravel depth beneath pipe 8.0/8.0 Ft. Subdivision Block Lot Beacon Hill Estates 11A Fill added above original grade 0.0/0.7 Ft. Gravel length 2 @ 25 Ft. Township Range Section Gravel width 3.0 Ft. Beds: Number of Lines Distance between lines Ft. SEPARATION DISTANCES To Septic Absorption LiftStation Holding Sewer Total absorption area Number of trenches Dist. between trenches From Tank Field Tank Line 800 FtZ 2 16 Ft. Well >100' >100' N/A N/A >25, TANK ❑ Septic ❑ S.T.E.P. ❑ Holding ❑ Other Manufacturer Anchorage Tank Capacity 1,250 Gal. Surface Water >100' >100' N/A N/A Material Number of compartments Lot Line >10' 31* N/A N/A Steel 2 NA Foundation >10' >10, N/A N/A LIFT STATION Manufacturer Capacity Curtain Drain None Noted NA Gal. Remarks *See Lot Line Waiver. Pump on level at in. Pump off level at in. High water alarm at in. 2" Insulation over septic tank. Pump make and model Electrical Inspections performed by PIPE MATERIAL House to tank F62$Tank to D3034 drainfield Installer Red Dog Masonry Drainfield D3034 CO/MT 3034 Inspector J. Mlllette, J. Williams BENCH MARK (Assumed elevation) 100 ft Inspdecct sn 151 3/19/19 3/22/19 Location and description 2nd 3`d 3/22/19 4'h Garage Slab. COMMUNITY DEVELOPMENT DEPARTMENT APPROVAL Engineer's Stamp ®®.erewe�®e ®®®�� O(. q t,® Conditional Approval: Date ® 49th )s ............................................ gym ; MICHAEL E. ANDERSON 9 •� �-v a 80��f •t NO. CE -4381 4 Ar •'••.,, Approved Date �� � ® 3/3/20 .••' eae�ROFES ®�•®®®®® Inspection Report-9-1-12.doc BEACON HILL ESTATES LOT 11 A PERMIT # OSP191017 PID # 015-092-91 LOT 10 EXISTING WELL / / \ LOT 9 \ >, -I EXISTING WELL � LOT EXISTING WELL \ V 100' ELL RADII LOT 11A \ 2-25'LONGx3'WIDEx8' / EFFECTIVE DEPTH , ABSORPTION TRENCHES E-T-' GINEERGE /_1.3 14 3.1 27.7 SV1 MT3 TH#1 C01 2CO Q MTI j FS SV2 SV1 B � 2 // FCOC FS 68.6 38.2 10' UTILITY & T&E EASEMENT 1,250 GALLON/ \ SEPTIC TANK J L ALTERNATE SITE CAT III SYSTEM WITH A 10' LONG x 3' \ WIDE x 8' EFFECTIVE ABSORPTION \ TRENCH. APP. RATE 4.0 GPD.SF. MEADOWS SUBDIVISION I I PLAN AS -BUILT 0 50 100 FEET 1 "=50' A B C FCO 3.1 27.7 SV1 64.7 22.4 SV2 67.7 30.3 2CO 68.7 32.7 FS 68.6 38.2 MT1 68.3 39.0 C01 66.0 38.7 MT2 88.6 52.5 CO2 90.5 53.2 MT3 72.6 56.4 CO3 69.4 55.5 MT4 90.5 65.2 C04 93.0 65.8 INKVy\ls'l CO - CLEANOUT 2CO - DOUBLE CLEANOUT FCO - FOUNDATION CLEANOUT FS - FLOW SPLITTER VALVE MH - MANHOLE MT - MONITORING TUBE SV - SEPTIC VENT TH - TEST HOLE BEACON HILL ESTATES Ll 1A PERMIT # OSP191017 P I D # 015-092-91 PROFILE AS -BUILT (NO SCALE) '." INSULATION BEACON HILL ESTATES Ll 1A PERMIT # OSP191017 PID # 015-092-91 93.2 93.3 o l - U:5 NORTH WEST TRENCH 97.0 FINISH / ORIGINAL GRADE DRAINFIELD ROCK ti 85.0 85.0 25' - 79.0 NO GROUNDWATER 7/3/08 F - SOUTH EAST TRENCH O17- 97.7 FINISH GRADE 97.0 ORIGINAL GRADE DRAINFIELD ROCK �O 85.3 85.3 �® 25' - 79.0 = NO GROUNDWATER 7/3/08 PROFILE AS -BUILT (NO SCALE) 93.2 93.3 4 -9th .�.y.-�,5.-- � : MICHAEL. E. ANDERSON �. r ,p'. N o. CE -4381 ��rFp'O 7/31 /19 ..,,a,•���® Municipality of Anchorage rnt sn Department 'r P.O. Box 196650 ® 4700 Elmore Road Anchorage, Alaska 99519-6650 ® (907) 343-7904 ® Fax (907) 343-7997 http://www.muni.org/Onsite Development Services Department On -Site Water and Wastewater Section x x x x VARIANCE/WAIVER REVIIE`vV x x x x Waiver#: OSV191070 COSA#: Permit#:OSP191017 PID#: 015-092-91 Legal Description: Beacon Hill Estates Lot 11A Engineer: Forge Engineering Applicant: Eric Trevithick Your request for a waiver of the required 10 feet horizontal separation from the absorption field to the property line has been approved. The approved separation distance is 3.0 feet. See engineer's waiver request for justifications. This waiver approval applies to the existing absorption field only. Any future upgrade to the on- site wastewater disposal system will require all separation distances be met or another approval from this department. ■■■■■aaaaaaa■■aaaaoaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa■■aaaaI Waiver is Granted: X Waiver is not Granted: Date: Lf 5 1 C-1 I Approved by: Name of Reviewer ■ ■ a ■ ■ ■ ■ ■ ■ a a ■ ■ ■ ■ ■ ■ ■ ■ ■ It ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ 1 ■ ■ ■ ■ ■ ■ ■ ■ ■ IN a ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ I **** VARIAN C EMAIVE R REVIEW **** August 9, 2019 MOA Development Services Department On -Site Water & Wastewater Program 4700 Elmore Rd Anchorage, AK 99507 Subject: Beacon Hill Estates, Lot 11A-7530 Beacon Hill Drive Lot Line Waver Dear On -Site Services Engineer: The lot line was not clearly marked prior to the construction of the absorption trenches on this lot. Unfortunately, the westernmost trench was placed at or near the property line for its full length. This lot line abuts the Beacon Hill Right of Way and is a substantial distance from all septic systems in the area. Placement of the absorption trench 3' from the property line will not adversely impact adjacent properties. Sincerely, '9th �........../. /. q./q.//......./Ya..........ti MtICHAEL E. ANDERSON �'��'.• IVC. CE -4381 8/8/19 4 Michael E. Anderson, P.E. psv 19 1 o"1 C) aa5 Cc -,18 �111)1rA a-_L'V - # 013351 r „• "' EfrlQre Road, .0. Ro_ 196650 Anchorage, F K 9950,77 Mark Segicdz :.:r;••, ;nnn¢.e; : rs�'sr Mayor eH Log Permit amber: OSP191017 )Date of $sseze: Date Started: 6-18-19 Date Completed: 6-24-19 Is well located at approved permit location? Lxj z'es L[ No Legal Description: Beacon Hilt Est. 11A Property Owner Name & Address: Trevi Builders Borehole Data: Depth (ft) Soil Type, Thickness & Water Strata From To stickup Q 2 overburden 2 5 5 dry silty sand , 9 clay & gravel 9 20 silt & gravel { 20 48 sand 4E 75_ silt & gravel _ 75 205 - gravel gravel w/ H2O no static wet gravel 205 Z25 I 230 " 225 230 235 bedrock ! 235 300 eater Sample Results-. Arsenic: !V N ug% t �Z3I I l Nitrates: mg/L Total Coliforbx Bacteria: Neste coioniesil OOmL r _ _c 6TEC. Method of (Drilling j xj air rotary U cable tool Casing type: steel Wall Thickness_ .250 inches Diameter -__6 inches Depth: X35 feet Liner Type: Diameter: - inches Depth: _� Feet Casing stickup above ground: 2 _ feet Static ,vFater level (frons ground. level): 221 feet Pumping Bevel- 221 feet after 2 hours pumping _._ _ $ gPm 12ecovery .l_tatc: 8 gpm Method of Testing: _pumping Open End lil Open Hole Q Screened Start 223 feet Stopped 235 feet n Perforations Start feet Stopped,_ feet (.;routT entorttte �e __v0I1S7iEC:ar�nrr1i Depth: 20` Start--.2--feet Stopped 20 feet Pump: Intake Depth 270 feet Pump si:ce 1•S hp Brand Name Grundfos SQE Well Disinfected Upon CompletioW` n Yes n No Method oflDisinfection-chlor�ne tablets Comments: Well Driller: Hefty Drifting, Inc. 3540 Akula Dr. Anchorage, AK 99516 Attention_ The well driller shall provide a well log to DSD within 30 days of completion. Development Services Department Building Safety Division On -Site Water & Wastewater Program 4700 Elmore Road U P.O. Box 196650 a Mark Begich Anchorage, AK 99507 Mayor www.muni.org/onsite (907)343-7904 Pump Installation Log Well Drilling Permit Number:,MOPPII VP Date of Issue: Parcel Identification Number: Legal Descriptio6erz 4 I F-� +, C ov1 �-F ,r 1 1 11,E Pump Installation Date: 7-1q— _1q_ j 9 Pump Intake Depth Below Top of Well Casing:,2'2bfeet Pump Manufacturer's Name: &rLA4 S Pump Model: /V 5 q� J 5— 3 3 o Pump size hp Pitless Adapter Burial Depth: /0 feet Pitless Adapter Manufacturer's Name: 6 10 Pitless Adapter Installer: P_Q,,� Well Disinfected Upon Completion?,Yes n No Method of Disinfection:CA 1 _ _l k -r- 1 Comments: Property Owner Name & Address: 7v,ev; 61mlldaf-S Pump Installer Name: P.O. BOX -1 ULV jDcfroragc, AK99511 Attention: The pump installer shall provide a pump installation log to the DSD within 30 days of pump installation. Z © }jam \ } J k (? 2 ) : rn \ \ f »OD k %}\\:0 »0\}� : i } \ \ t 4 r /.. } . )Lil -4 ® © » \ } 2 / ? 20 % ® 0 4 % \ \ / rTi » - » : » « > Q \ \ \ \ \ a » \ \ \ - # 2 < rn z Ztn ;Orr rn : \ CD / : 4 « / 0 ? o / C - \ / ~ XWMM /0 \ \ CD \ \ \ - i \ \ % « /� \ \ z/ f C)(rn « 4 » � ? a » rn \ \ \ Q oco\ } \ \ k § ~f th \ \ . \ «f # ƒz 0 - « : ? « \ «� 2 » « y\: 4° 2 2 q\ 4 0 \ % f z \ o \ 2 . 0 ? + . 2 � � \ . + -Ln Ki » ,� i ,■ < <°: � § � . . w O { # Sn [ � C I � 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 http://www.muni.org/onsite On -Site Water & Wastewater System Permit Permit Number: OSP191017 Work Type: WellSeptic Initial Tax Code Number: 01509291000 Site Legal Address: BEACON HILL ESTATES LOT 11A G:2440 Site Mailing Address: 7512 BEACON HILL DR, Anchorage Owner: WESTLIEN ERLING JR & Design Engineer: FORGE ENGINEERING This permit is for the construction of: LSI Disposal Field Q Septic Tank ❑ Holding Tank ❑ Privy Effective Date: Expiration Date: 2/1/2019 2/1/2020 Lot Size in Sq Ft: 26704 Total Bedrooms: 4 2 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 Received B) Issued By: Date: L Date: 2 MUHMPAUTY OF AHC HORAGE Community Development Department y Phone: 907-343-7904 Development Services Division Fax: 907-343-7997 On -Site Water & Wastewater Program ON-SITE SEWER/WELL PERMIT APPLICATION Parcel I.D. 015-092-91 Property owner(s) Erling Westlien & Marie Sissel Mailing address 803 Daria Drive Houston, TX 77079 Site address 7530 Beacon Hill Drive Anchorage, AK 99516 Day phone 301-5359 Legal description (Sub'd., Block & Lot) Beacon Hill Estates, Lot 11A Legal description (Township, Range & Section) Lot Size 26,704 Sq. Ft. Number of Bedrooms Four APPLICATION IS FOR: APPLICATION IS AN: TYPE OF DWELLING: (N all that apply) Absorption Field ❑X Initial ❑X Single Family (SF) ❑X (w/wo ADU) Septic Tank ® Upgrade ElDuplex ❑ (D) Holding Tank ElRenewal ElMultiple Dwellings ❑ Privy ❑ (SF and/or D) Private Well ❑X Water Storage ❑ THIS APPLICATION INCLUDES A VARIANCE / WAIVER REQUEST FOR: Distance: I certify that the above information is correct. I further certify that this is in accordance with applicable Municipal Codes. (Signature of property owner or authorized agent) Permit/Rush Fees: gad _'V_' Waiver Fees: Date of Payment: 49zl9 Date of Payment: Receipt Number: OW&/P Receipt Number: Permit No. Qs,019 / Ul7- Waiver No. Permit App_.:- : . '-..:c PO BOX 240773 ANCHORAGE, AK 99524 522-7773 677-7766 (FAX) January 29, 2019 MOA Development Services Dept, On-Site Water & Wastewater Program 4700 Elmore Rd Anchorage, AK 99507 Subject: Beacon Hill Estates, Lot 11A – 7530 Beacon Hill Drive Septic System Design Dear On-Site Services Engineer: The developer of the subject lot intends to construct a 4-bedroom home on the property. We are submitting this design and permit application for the construction of a new well and septic system. A permit was issued in 2008 (SW080191) for the construction of a septic system in the same general area. The test hole from that permit was used in the design of the proposed system. The attached site plan identifies the location of the home and the proposed well, septic location and alternate site. No conflicts exist between this proposed system and any other well or septic system, whether on this lot or adjacent lots. The ground surface on the lot slopes moderately to the northwest. Ground contours are shown on the site plan showing the grade and direction of flow. Storm water drainage will not impact this septic system. The new trench will be constructed parallel to the slope as much as possible. Please refer to the attached test hole log, and plan and profile sheets for the septic design. If this design is followed, there will be no adverse impacts to adjacent properties. Sincerely, 1/29/19 Michael E. Anderson, P.E. Municipality of Anchorage On-site Water and Wastewater REVIEWED FOR CODE COMPLIANCE OSP191017, Deb Wockenfuss, 02/01/19 740.0750.0736.0738.0742.0744.0746.0748.0752.0754.0100 50 0 FEET 1"=50'4-BDRM HOMENOTE: NO SLOPES >25% WITHIN 50' OR SURFACE WATER WITHIN 100' OF THE PROPOSED SEPTIC SYSTEM ALL WELLS ON SURROUNDING LOTS WITH IMPACTS TO THIS PROPERTY ARE SHOWN. NO CONFLICTS WITH WELLS OR SEPTIC SYSTEMS. CO - CLEANOUT 2CO - DOUBLE CLEANOUT FCO - FOUNDATION CLEANOUT FS - FLOW SPLITTER VALVE MH - MANHOLE MT - MONITORING TUBE SV - SEPTIC VENT TH - TEST HOLE LEGEND BEACON HILL ESTATES LOT 11A MEADOWS SUBDIVISION TH#1 PROPOSED WELL ALTERNATE SITE CAT III SYSTEM WITH A 20' LONG x 3' WIDE x 8' EFFECTIVE ABSORPTION TRENCH BEACON HILL DRIVEINSTALL 2 - 25' LONG x 3' WIDE x 8' EFFECTIVE DEPTH ABSORPTION TRENCHES 1,250 GALLON SEPTIC TANK 10' UTILITY & T&E EASEMENT CO CO CO CO 2CO FS MT MT SV SV FCO Feb 01, 2019 SLOPES > 25% SLOPES > 46% 10.0 Municipality of Anchorage On-site Water and Wastewater REVIEWED FOR CODE COMPLIANCE OSP191017, Deb Wockenfuss, 02/01/19 BEACON HILL ESTATES, LOT 11A DESIGN FACTORS: SYSTEM REQUIREMENTS: 600 GPD PEAK FLOW PERK RATE: 6-15 MIN/IN APPLICATION RATE: .8 GPD/SF 8' DEEP TRENCH SYSTEM 1,250-GAL SEPTIC TANK TYPICAL TRENCH SECTION (NO SCALE) 4" PERFORATED PVC (HOLES DOWN) DRAINFIELD ROCK 3' 6" 6" 3' 8' NOTES: 1. GRADE AREA OVER TRENCH TO DRAIN AWAY 2. PROVIDE 3' OF COVER OVER TRENCHES AND 4' OVER SEPTIC TANK, OR 2' WITH 2" OF INSULATION 3. CHECK GROUNDWATER AT TIME OF CONSTRUCTION. IF LEVEL IS HIGHER THAN PREVIOUSLY OBSERVED, CALL ENGINEER IMMEDIATELY BOTTOM OF TRENCH: 11.5' BELOW GRADE FLOW LINE ELEVATION: 3.5' BELOW GRADE TOP OF TRENCH: .5' ABOVE GRADE 600 GPD / .8 GPD/SF /8' DEEP / 2 SIDES = 46.875 LF TRENCH REQUIRED (50 LF SPECIFIED) Jan 29, 2019 Municipality of Anchorage On-site Water and Wastewater REVIEWED FOR CODE COMPLIANCE OSP191017, Deb Wockenfuss, 02/01/19 rn � V) Q op 0 O L (N N � O ^O ��ON a J /` 2` v s°'0�t z b�110IS ° O U Q "o LLI m 0Zt 08 i i i i J .l0'ZSZ M..00.ZOo00 N w MO II 1 40 Q�••••: : ••�••.,So oo10 AIF o Q. • • "ern o ll • : : �80�i o 0 AV a • �. b� ••,, . �..• `eye .1 •••, 1 � \ ��••� LLJ Lo (A Q z Op Q Z VI � Z Z W } F N W Q o cr W> QQ �o C UzO o j Q Z Z a p ZO W M W a o a _� U U P 0:N W 0� LLP= } Z LLJ W W > o W W 2 c J N� r Q 0 Z x Z � x O w z 03 � O w o Z Q~ 0 0 2 2 W Ln Cr x x> o a z a Z CL >- 001-00 zwm `` } Q - y > Cr�� W L- z 00:0 o a AMM L)—Ji „NZ z 0 cpZ 0 >w Dug ZoLn aa�N c a NQW�U0 W N 2 m� Z cri W m O1 Q 0 o Q d' N zW 0cn'i' a m oZNZQ� 0 o WC93WLLP O ~tA Q>aQ0o O N =LWox u, LL.x a /J ' o U o m A N Q 0 1 LZ MUNICIPALITY OF ANCHORAGE Development Services Department On -Site Water & Wastewater Program 4700 South Bragaw Street P.O. Box 196650, Anchorage, AK 99519-6650 (907) 343-7904 ON-SITE WASTEWATER DISPOSAL SYSTEM / WATER SUPPLY PERMIT Initial Permit Number: SW080191 Date Issued: Sep 11, 2008 Expiration Date: Sep 11, 2009 Parcel ID: 015-092-53 Legal Description: BEACON HILL ESTATES LOTS 11 & 12 Design Engineer: 0014 ANDERSON ENGINEERING Site Address: 7510 BEACON HILL Owner Name: MIKE & MARIKA HEATWOHL Lot Size: 26688 SQ. FT. Owner Address: 2415 TURNAGAIN PARKWAY Total Bedrooms: 4 Permit Bedrooms: 4 ANCHORAGE, AK 99517 - This permit is for the construction of: ❑✓ Disposal Field [?] Septic Tank ❑ Holding Tank ❑ Privy ❑✓ Private Well ❑ Water Storage 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 ( 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. Received By: Date: L7" //_ ae Issued By: Date: / \ Municipality of Anchorage Development Services Department Building Safety Division _ y On -Site Water and Wastewater Program 4700 Bragaw Street P.O. Box 196650 Anchorage, Alaska 99519.6650 www.muni.org/onsfte (907)343-7904 ON-SITE SEWER/WELL PERMIT APPLICATION FOR A SINGLE FAMILY DWELLING Parcel I.D. 015-092-53 (S-11690) Property owner(s) Mike and Marika Heatwohl Day phone 245-5122 Mailing address 2415 Tumagain Parkway Anchorage, AK Zip Code 99517 Site address 7510 Beacon Hill Drive Zip Code 99516 Legal description (Sub'd., Block & Lot) Lots 11 812 (11A), Beacon Hill Estates Subdivision (S-11690) Legal description (Township, Range & Section) Lot Size 26,688 Sq. Ft. THIS APPLICATION IS FOR IS all that apply): Absorption Field 0 Septic Tank El Holding Tank ❑ Privy ❑ Private Well Water Storage ❑ Number of Bedrooms Four (4) THIS APPLICATION IS AN: Initial El Upgrade ❑ Renewal ❑ I certify that the above information is correct. I further certify that this application is being made for a Single Family Dwelling and is in accordance with applicable Municipal Codes. (Signature of property owner or authorized agent) Permit/Rush Fees: test) Waiver Fees: Date of Payment: o� /a0/iS Date of Payment Receipt Number. o Receipt Number. (Rev. 11/05) ANDERSON ENGINEERING P.O. BOX 240773 ANCHORAGE, AK 99524 522-7773 677-7766 FAX August 18, 2008 Municipality of Anchorage Development Services Department On -Site Water and Wastewater Program 4700 South Bragaw Street Anchorage, AK 99519-6650 Subject: Lot 11A, Beacon Hill Estates Subdivision Septic System Design and Permit Application Impacts to Adjacent Properties Dear Onsite Services Engineer: The owner of Lot 11A, Beacon Hill Estates Subdivision intends to construct a new four- bedroom home on the lot. We are therefore requesting a permit be issued for the construction of a new well and septic system to accommodate the home. The attached Site Plan and backup documentation identify the location and configuration of the proposed well and septic system along with the alternate site. Existing wells and septic systems in the surrounding area are also shown. Drainage arrows and existing ground contours are shown on the site plan showing the grade and direction of flow on the lot. The drainage pattern will not be changed as a result of this project. The test holes placed on the lot in the area of the absorption trench and alternate site indicated silty gravel (GM) material with some sand. The percolation rate of the soil was determined to be between 6 and 15 minutes per inch. No groundwater was found during the placement of the test holes and none was noted during the monitoring period. An application rate of .8 gallons per day per square foot was used in the design of the absorption system. We are proposing to place a new 1,250 -gallon septic tank and a 50' long by 3' wide by 8' effective depth absorption trench to treat and dispose of the effluent generated in the house. The elevation of the distribution line in the absorption trench will be 3' below the surface and the total depth will be 11'. A minimum of 3' of fill or 2" of insulation and 2' of fill will be placed over the absorption trench and 4' over the septic tank. The ground surface on the lot in the area of the absorption trench slopes to the northwest at a grade of 12%. The new trench will be constructed parallel with the slope as much as possible in conformance with Municipal requirements. The new septic system will be constructed a minimum of 100' from all wells and any surface water and Lot 11A, Beacon Hill Estates Subdivision August 18, 2008 Page Two 10' from the proposed and existing water services in the area. If the system is constructed in accordance with our design the following statements apply: The system, if constructed as designed, will have no adverse impact on the wells in the area or those to be constructed in the future. 2. The system, if constructed as designed, will have no adverse impact on existing septic systems in the area or those to be constructed in the future. 3. The system, if constructed as designed, will have no adverse impact on reserve space, either surface or subsurface, on any lots located in the area. 4. The system, if constructed as designed, will have no adverse impact on drainage patterns in the area. The current drainage pattern will be maintained. Sincerely, -1V1j'6,t EA't.-s-n Michael E. Anderson, P.E. Attachments 4gtn \ WCNSEE E ANUR$ON /�— ---�� WILDWOOD CIRCLE \ 10 \\ /O�� ti� • I fV I 8 to 5 I N b W I L D WW00 0ID G L E N I= S U B D. I 7 N 89'S8'OS'E 211.62' \ VACANT M c C R E A D Y I� MEAD0WBS SUED. � 49th ~�Lt •�•�1 AREA MAP n i MAN Itl41EL E. DERSON SCALE 1' = 100' �k ���y`•.,_ No. CE -4381 t�� BEACON HILL ESTATES SUBDIV SION LOT 11A 26688 S.F. / J In � U at site v$ TH1 TH20 1 25 Cal o 1 Septic Tank 50'�on x 3� Wide F/ _ —x-'8`Ef ec ne' e�pth—/� _/Absorption Trench / /N 89.58.05-E / 211.6 ' x Well J I Proposed I p ®Well I o 9 I Q / X Q SITE PLAN SCALE 1' = 40' 4t L ANDERSON LOT 11A, BEACON HILL ESTATES SUBDIVISION DESIGN FACTORS: SYSTEM REQUIREMENTS: Four Bedroom Home Deep Trench System Perc. Rate: 6-15 Min./Inch 1,250 Gallon Septic Tank Application Rate: .8 GPD/SF 8' Drainfield Rock 4 Bedrooms X 150 GPD/.8 GPD/SF (Application Rate) = 750 SF Absorption Area 750 SF/16 SF/LF = 46.8 LF Trench Length THEREFORE: Construct A 50' Long x 3' Wide x 8' Effective Depth Absorption Trench at the Location Shown. Flow Line Elevation in Trench to be 3' Below Original Ground Surface. Total Depth to be 11' Below Existing Ground. Provide 4' Cover Over Septic Tank and 3' Cover Over Absorption Trench. Maintain 100' Separation from Wells in the Area. Place Splitter Valve to Insure Even Flow to Each Trench. Natural Backfill Geotextile 2'6" Fabric 6" O 4" Perforated PVC (Notes Down) 8'0" 3' Drainfield Rock TYPICAL DEEP TRENCH SECTION -•-w (NO SCALE) •��P��'"" ~" NOTE: Grade Area Over Trench to Drain Away. Minimum 6' Separation From BedroGroundwater. Minimum 4' Separation From Groundwater. Minimum 100' Separation From Wells in the Area. .«cKMIF o RWN Minimum 100' Separation From Surface Water or Streams: ��� ,;; No. CE -M, , 4- 5- 6- 7- a- 9- 10- 11- 12- 13- 14- 15- 16- 17 18- '- 19- 20 - COMMENTS PERFORMED BY: PERFORMED INF 7 o� d SM " M eAr r),ls- -jam e WAS GROUND WATER t' ENCOUNTEERED? N -IFYES, AT WHAT DEPTH? Depth to Water After NO Monitoring? yf/ Dale: $ Q _ If 1 I I I ri I. Slope Perpendicular PERCOLATION RATE 1 D (mivi.~) PERC HOLE DWMETER TESTRUNBETWEEN FT 'AND fin. O FT 1n/2.G I.raSe,0�K.i_A I CERTIFY THAT THIS TEST WAS WITH ALLSTATE AND MUNICIPAL GUIDELINES IN EFFECT ON THIS DATE. DATE: Municipality of Anchorage ,�P,: � •�`� 'r �• 4� iN S sem I II Development Services Department Building Safety Division pp.. •• ••••• ••� :�» •••• •••e I L49 • yr On -She Water and Wastewater Program ' 4700 South Bragaw St. e.....�. I ,e I. AU04AEL E ANDUSON 4 v I '�•. •, v P.O. Box 196650 Anchorage, AK 99519.66500 wwwcfanchoraoe.ak us iJ, .• - CE -4381 �� v ,� �FQ'g8-/y-OI;,•'`Ig'Z Fl." _. _.. (907)343-7904 .6. ---.---.--Soils Log - Percolation Test Performed For. Date Performed: Legal Description: Beac0n Hill Ests., Lot 11A Township, Range, Sections, sive � Sile.Plan 1 4- 5- 6- 7- a- 9- 10- 11- 12- 13- 14- 15- 16- 17 18- '- 19- 20 - COMMENTS PERFORMED BY: PERFORMED INF 7 o� d SM " M eAr r),ls- -jam e WAS GROUND WATER t' ENCOUNTEERED? N -IFYES, AT WHAT DEPTH? Depth to Water After NO Monitoring? yf/ Dale: $ Q _ If 1 I I I ri I. Slope Perpendicular PERCOLATION RATE 1 D (mivi.~) PERC HOLE DWMETER TESTRUNBETWEEN FT 'AND fin. O FT 1n/2.G I.raSe,0�K.i_A I CERTIFY THAT THIS TEST WAS WITH ALLSTATE AND MUNICIPAL GUIDELINES IN EFFECT ON THIS DATE. DATE: - - (907) 343-7904 Soils Log - Percolation Test Performed For. Date Performed: 3 a Legal Description: Beacon Hill Ests.. Lot 11A Township. nge, Seaton;, -� �SlopeSite Plan I y I II� _ __ (Feet)I 'flG' 13- ' COMMENTS ihP��••::.. ;cgS��1 14- 15- 6-16- II Municipality of Anchorage * 4 3g Elr<y 2, *0�j Development Services Departmentj ,", 'Q . Building Safety Division 0................""7 .................a, On -She Water and Wastewater Program �� f*'„ MICHAEL F ANDERSON i 4700 South Bage, ASt. P.O. Box Anchorage, 99519.6650 0 i •. 4381 : s� 1f www www. ci. anchorage. ak. u5 k. - - (907) 343-7904 Soils Log - Percolation Test Performed For. Date Performed: 3 a Legal Description: Beacon Hill Ests.. Lot 11A Township. nge, Seaton;, -� �SlopeSite Plan I y I II� _ __ (Feet)I 'flG' 13- ' COMMENTS V OGG. �I�rs 14- 15- 6-16- II 16- 17- 17-18-19- 18- 19- COMMENTS A 4o . ( i WAS GROUND WATER 117 ENCOUNTERED? F YES, AT WHATDEPTH7uOLN/�I GI`D Depth to Water After N� _ Monitoring? . Dater Slope Perpendicular Reading Date Gross Time Net Time Depth to Water Net Drop -130s to 1 4-.s'S'l : 3v -7- Of 2.2� 1 92 3v /..A4- -Z- -15r PERCOLATION RATE 1-1 — (ninwe✓nCU PERC MOLE DIAMETER TESTRUNSETWEEN 1,S FT AND S Fr PERFORMED BY: J��ry-'�J,/ I CERTIFY THAT THIS TEST WAS PERFORMED IN AC OL' RDANCE WITH ALLSTATE AND MUNICIPAL GUIDELINES IN EFFECT ON THIS DATE. DATE: ) Gm) VJTVJ tiV cr) ce) NT C? 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