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HomeMy WebLinkAboutMCKINLEY HEIGHTS #1 BLK 7 LT 2McKinley Heights #1 Block 7 Lot 2 051-213-20 NOT INSTALLED PER ENGINEER OF RECORD! Municipality of Anchorage Development Services Department • '-r Building Safety Division On -Site Water and Wastewater Program 4700 South Bragaw St. P.O. Box 196650 Anchorage, AK 99519-6650 www.muni.org/onsite (907)343-7904 ON-SITE SEWER/WELL SUBMITTAL COMMENT SHEET To: Northrim Engineering Legal description: McKinley Heights #1. Block 7 Lot 2 The attached paperwork has been reviewed and is being returned for the following reasons: ❑ Water monitoring results inadequate. ❑ Discrepancy in information submitted. ® Topographic information missing or inadequate. The site plan shall have a description of the topography, areas of excessive slope, and extent of slopes and surface drainage patterns within 100 feet of any part of the system or portion of the lot intended for use for on-site Incomplete; missing _ ® Incomplete; missing The site plan shall show measured distances to all wastewater disposal systems, wells. surface water or drainage courses, roads, property lines and Lj Additional adequacy test information needed. ❑ Water sample unacceptable. ® Other. 2. Please show that the driveway will meet the required slope of 10%. 3. The distribution field is closer than 10' to the property line, a lot line waiver is required that lot? 5. Sheet 2 of 4 is not to scale. Please provide a site plan that is to scale. Name of reviewer: DMW Date: 8/28/06 Please-sup/ply-thin-ne-cessarylnformatlon-an-d Te=submltyourmquest. LEAVE THIS FORM ATTACHED TO THE PAPERWORK 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.org/onsite (907)343-7904 ON-SITE SEPTIC/WELL PERMIT APPLICATION FOR A SINGLE FAMILY DWELLING Parcel I.D. 0am/-X13"-�1) Property owner(s) D D yck �FEnl�fisa Eif2 Day phone Z 4CS —�.s�0 ?c Mailingaddress ZZ� /g/YlU/tGfU�( Zip Code Site address Legal description (Sub'd, Block & Lot) Legal description (Township, Section & Range) Lot Size 5170 lioa Sq. Ft. THIS APPLICATION IS FOR (®all that apply): Absorption Field Septic Tank ❑ Holding Tank ❑ Privy ❑ Private Well Water Storage ❑ wore M kl Number of Bedrooms 411— THIS ! 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 Family Dwelling and is in accordance with applicable Municipal Codes. (Signature of property owner or aut&Kzed agent) Permit/Rush Fees: Lit 0 ) Waiver Fees: Date of Payment: '00V Date of Payment: Receipt Number: 2 Receipt Number: (Rev. 11/05) b- TI-�IM ENGINEERING NorthRim Engineering 171'V 1, ai Fc,H C4c' • Rirei FK Y07 69.170" August 24, 2006 MOA On -Site Water & Wastewater Program 4700 Bragaw St Anchorage, AK 99519 RE: Septic System Design & Well Location; McKinley Heights SID, Block 7, Lot 2 A lot is being developed. Suitable soil was discovered. Bedrock was encountered at 7 feet below grade. This is a new septic system and water well. Some of the neighboring lots are developed. This site should not negatively impact any of the other area lots. The drainage slopes from back of lot towards front of lot toward Amonson Road. Adequate separation exists between the proposed site and neighboring lots. Please review the wastewater system design for the single family home. I have included design plans & specs, design guidelines, & soil tests. If there is need for additional information or clarification please give me a call. Sincerely, ?tev;v Eng, PE, PH / Design Enclosures ENGINEERING MCKINLEY HEIGHTS S/D, Block 7, Lot 2 SPECIFICATIONS & DESIGN GUIDELINES Wastewater System Sizing: This is a future single family home projected at 4 bedrooms. This requires a 1250 gallon septic tank. This lot is over 1 acres in size, as are neighboring lots. Some of the neighborhood lots have been developed. No adverse impacts are expected from developing this lot. The proposed water well is located on the drawing as are the neighboring wastewater systems & water wells. The lot slopes from back to front, toward Amonson Road. Portions of the lot are over 25% slope; the area of the septic system is about 20% to 25% slope. This slope will require grading within 50 feet of the downslope trench. No conflicts to any neighbor lots is anticipated. Three soil tests were conducted; a sandy w/gravel soil with an excellent percolation rate. Bedrock was discovered at 7 feet below the surface. An application rate of 1.2 GPD/FT2 with 0.7 reduction factor for utilizing a 5' wide trench was utilized. Specification Requirements: All components and work must comply with the Municipality of Anchorage Specifications (AMC) & State of Alaska Drinking Water Regulations and Wastewater Regulations. • Two compartment, 1250 gallon septic tank. • Watertight couplings on inlet & outlet. • 5 foot minimum between the tank and bed. 10 foot to property lines. • 3 feet of cover or insulation is required for trench; an equivalent of 1" insulation for each foot soil cover. • Tank & solid pipe must be set on well compacted, stable soil. • 4 inch diameter cleanouts with airtight caps are required 1 to 4 feet from foundation wall, prior to any 90 degree bend in 4 inch line, in each tank compartment, and two adjacent opposing cleanouts between the tank and the absorption field, not more than 10 feet from the tank positioned to provide cleanout access towards the tank and towards the absorption field. • All cleanouts must extend to at least ground level. • In solid pipe runs, ASTM D-3034 may be used in lieu of cast iron. • Trench to be placed level, minimum of 4 feet to groundwater, 6 feet to bedrock from drain - rock. • Drain rock to be %z inch to 2 %= inch screened. Drain rock to be distributed uniformly throughout the trench. • Perforated pipe to be installed level with perforations down. • Silt barrier (filter fabric) to be installed above the drain rock. • Smeared trench sides must be raked or scarified before drain rock placement. • Backfill over drain rock must not be less than 36". • The finish grade must be mounded to promote drainage over the trench. • Insulation must be placed over any pipe installed under driveways or parking areas. • Approved pipe materials include cast iron, PVC ASTM D3034, PVC ASTM F789, ABS ASTM D2661, • Sewer Service Line is minimum 2% slope. • Septic Tank to be pumped every two years or when required. • Insulation board to be extruded direct burial polystyrene (Dow Styrofoam III or equal) ti I O O F— i F- Q W 0 N� � 2: w oil w = o >, J W m F— U 3C5 PCI \(� }a 0 �O 0d L Z �C o lf) z �F-- A �, U u c Ui N +' L� a c ZO C3 �U v -i m V) Ca ¢ ; UZ� Q1+, �V)) :ptntA (5 S a aQ) -I' L d QJ f N O O Li2:Q� V1 A -1 Q F- 3 :D w_ a 3 o c ° `r > Q U N -j L o N 7 Z E N O Q F- pN J E E O .� c U) O i U aE i C a a OO N C n N N - mUJ ca 6 o p N U) UO cc Z U s NZW a°° _ U Y °a Z v 3 y coami F,W g`h (n FO- N 0 o o m m CD N r -i 4 6 � � n 0 Septic Area ODO 17�i 4 Vacant i I E I ,l OR THRI M El l GI/ 1EEP11 lG 17237 Bear Pow ClrCle Eagle River, Aloska 99377 907,694 7028 EASEMENT i-� e New Septic System New _ io• uia �s-,t —Well—. 389.13: ..:... . , — _ 128.34 —'L., 128.34 — — 89.59'00"w 11;5.06 Ij (P629A) V ) Vacant 5 J eptic Well OFAt3k MCKINLEY HEIGHTS BLOCK 7, LOT 2 LOT PLAN .•.... `gyp SUBDIVISION LAYOUT owe: 1• = so' 8/23/06 2/4 > CL » -------- �- ---�---------- I� $ & o t . v a % t _j \ § 2 0 e f C m 06 G z g $ 2/ f / - !t w o > lu \L/ t\r � � { j �� �C) zlz 4 �CL \ u q ai ) � #� m ;�I > cu, \ \ k 0 ci Li O i : a 8 » � f c 2 0 0 §a & / / >u o� L Cl u! ¥ 0 ' U 3 ® � c 0 E �! u « t I � { \/ 1 m u �_j LLI o - � � 0/ » ±�� ; ¥ 5t \ § �L%d /-� > ® �I�7 r) : & & /�/z )fN Nov ¥ �/ - ou ® 2 eo�� F— � ƒ z/§ ����� u ©"0w�©2°- k }} f--�0,.9c)L �J�j00 U�3Lnt QJ 3 \ 0)[ t�=§ 0{)o{� a®cL °°°°° E°° ƒ%£!§ e e �e��a,�� 2{u]L[/6§u\ &U�#z z�#°■�0�_&» �ƒ( §/A�G�W<ol 2 2Lu _.. Ncu w¥ea w �/ 0 / j / 2 } \ 't cu 3L f ƒ k� k� \u _ CD 41 }, L �+ L cl l'- a.L _ } � » $ cl ��+t' 0; Ln a `6& 1.4 VI\} >at ` //pq 3d0 \ kA / +)=> 66±\ } �uu D R 4'] ) 222ƒ z7/) [ U o. �- �en�� L R4w¥ 0 / j / 2 } -bl 't )' 3L �� 3 k� k� we ; ac C �®c i� wt a0 `� » _ } � » $ ��+t' Ln a 1.4 >at ` \ / } ® G ) L � ) � \ L p E d9 : -bl � ft 't )' 3L �� `. k� k� we ; ac C �®c i� wt a0 `� i q ° � » $ ��+t' Ln a � ft 't �� `. ; i� wt a0 `� e ��+t' " TH �M S❑ILS LOG - PERC❑LATI❑N TEST ENGINEERING Date Performed; 8/9/06 Performed For; Chuck Steffensmeier Legal Description: McKinley Fits, Block 7, Lot 2 DEPTH (FEET) 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 - 13 - 14 - 15 - 16 - 17 - 18 - 19 - 20 - 21 - Organic T.H. Location: See Drawing SP Sand w/ Gravel Groundwater? No f1FF�fgL Depth -- Water Depth After Monitorinn.Nnnra nn+oi aia,4inr- # Date Gross Time Net Time Depth V v Net Drop 1 8/9 0 -- 6' -- 2 8/9 10 10 min. 12' 6' 3 8/9 12 -- 6• 4 8/9 22 10 min. 12' 6' 5 8/9 23 -- 6' -- 6 8/9 33 10 n(. 12' 6' Percolation Rate 1.7 min./inch Perc Hole Diameter Test Run Between 4' and 5' Comments Prp-qonkpd. Good Perk Performed By NnrthRim Fng. I Performed in Accordance with All S ON THIS DATE, DATE, -8/24/06 NOR THRIM ENGINEERING 17237 Boor pow ClrCle Eagle River. Alaska 99577 907.691. 7028 6' _ CERTIFY THAT THIS TEST WAS to/Municipal Guidelines in Effect TESTH❑LE LOG I GE❑TECHNICAL T. H. 2 ---- - 8/24/06 2 of 3 S❑ILS LOG - PERCOLATION TEST k'IME Date Performed: 8/9/06 NGTINEERING Performed Fors Chuck Steffensmeier Legal Descriptions McKi DEPTH (FEET) 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 - 13 - 14 - 15 - 16 - 17 - 18 - 19 - 20 - 21 - Organic Hts, Block 7, Lot 2 T.H. Location See Drawing SP Sand w/ Gravel Groundwater? No jzE#;-'t4.4L Depth -- Water Depth After Monitorino.None Dates 8/23/06 # Date Gross Time Net Time Depth Net Drop 1 8/9 0 -- 4' -- 2 8/9 10 10 min. 10' 6- 3 8/9 11 -- 4' -- 4 8/9 21 10 mid. 10' 6' 5 8/9 22 -- 4' -- 6 8/9 32 10 mir. 10' 6' Percolation Rate 1.7 min./inch Perc Hole Diameter 6' Test Run Between 3' and 4' Comments - Performed By NorthRim Fng. I CERTIFY THAT THIS TEST WAS Performed in Accordance with All State/Municipal Guidelines in Effect ON THIS DATE. DATES 8/24/06 NOR THRI M ENGINEERING 77237 Bear Paw Circle Eagle Ri~. Alaska 99377 907.694.7028 TESTH❑LE LOG T. H. 3 GE❑TECHNICAL- Dab: _ 8/24/06 3 of 3