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Home My WebLink AboutCREEKVIEW ESTATES TR Akview Tr A #017-151-24 Permit Number: OSP141139 Tax Code Number: 01716124000 Work Type: WellSeptic Permit Effective Dates: June 10, 2014 On-Site Water & Wastewater System Permit MUNICIPALITY OF ANCHORAGE Development Services Department On-Site Water & Wastewater Program 4700 Elmore Road, PO Box 196650 Anchorage, AK 99519r6650 Telephone: (907) 343-7904 Initial to June 10, 2015 Design Engineer: NORTHERN GEOTECHNICAL ENGINEERING Subdivision: CREEKVIEW ESTATES Site Legal Address: CREEKVIEW ESTATES TR A G:3138 Owner/Address: WINN W BRYAN & ANDREA L 5835 PROMINENCE POINTE DR ANCHORAGE AK 995160000 Site Mailing Address: Lot Size in Sq Ft: 547815 Total Bedrooms: 4 This permit is for the construction of: Y Disposal Field Y Septic Tank N Holding Tank N Privy Y Private Well N 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 wastewater code requires inspections during the installation. The engineer must notify the Development Services Department at least 2 hours prior to each inspection. Provide notification by calling (907) 343-7904 (24 hours). 4. From October 15 to April 15, a subsurface soil absorption system under construction during freezing weather must either: A. Open and Close on the same day. B. Covered, sealed, and heated to prevent freezing. Received By: ,,,~, i~//~/'-~, .~¢2 Da,e: MUNICIPALITY OF ANCHORAGE Community Development Department Development Services Division On-Site Water & Wastewater Program Phone: 907-343-7904 Fax: 907-343-7997 ON-SITE SEWER/VVELL PERMIT APPLICATION Parcel I.D. 017-161-24-000 Property owner(s) W. Bryan & Andrea Winn Day phone (907) 306-6446 Mailing address 5835 Prominence Pointe Dr., Anchorage, Alaska, 99516 Site address Legal description (Sub'd., Block & Lot) Creekview Estates Tract A Legal description (Township, Range & Section) - - - Lot Size 547,985 .Sq. Ft. Number of Bedrooms Four (4) APPLICATION IS FOR: ([~ all that apply) Absorption Field [] Septic Tank [] Holding Tank [] Privy [] Private Well C~ Water Storage [] APPLICATION IS AN: Initial [] Upgrade [] Renewal [] TYPE OF DWELLING: Single Family (SF) (w/wo ADU) Duplex (D) Multiple Dwellings (SF and/er D) 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 pr~'~eh~/o~/ner Far..~thorized agent) Permit/Rush Fees: Date of Payment: Receipt Number: Permit No. ~aiver Fees: I"~Date of Payment: Receipt Number: Waiver No. NORTHERN GEOTECHNICAL ENGINEERING, INC./TERRA FIRMA TESTING June 10, 2014 Municipality of Anchorage On-Site Water and Wastewater Program Development Services Division Department of Conmmnity Development 4700 Elmom Road Anchorage, AK 99517-6650 Atto: Onsite Services Engineer 3687-14 SUBJECT: SEPTIC SYSTEM DESIGN AND PERMIT APPLICATION FOR CREEKVIEW ESTATES TRACT A, ANCHORAGE, ALASKA To Whom It May Concern, Our client intends to construct a four-bedroom home on Creekview Estates Tract A. The lot is currently undeveloped and vegetated with brushes and trees. On behalf of our client, NGE-TFT is therefore requesting a permit be issued for a septic system to serve the new home. Figure 1 presents the site topography with the general topography line (provided by client). The subdivision is planned to be served by a single family water disposal system which would be installed onsite. Figure 2 indicates site plan with backup documentation displaying the configuration of the proposed septic system as well as an alternative site. No setback conflicts exist between the new septic system and the single family water supply. Prior to our work, the area had about 10 percolation tests performed. This data indicated the best area was a small ridge to the west of an indistinct swale. Once the property was sold as a single site (a nine lot subdivision was proposed previously), the remainder percolation tests were not required. On April 10, 2014, representatives from NGE-TFT met with an excavator operator to advance two test holes, designated TP1 and TP2, on the proposed septic system footprint. Percolation testing was conducted on the soils in the area of the absorption trenches and alternate site. The approximate locations of the test pits are shown on Figure 2 and on the attached test pit logs. 11301 Olive Lane Anchorage, Alaska 99515- Phone: (907) 344-5934. fax: (907) 344-5933. Email: kmobley~nge-tl~.com Winn Residence Bryan Winn June 2014 3687-14 These locations were not surveyed and as such are approximate. TP1 is overlain with approximately seven feet of well-graded sand with gravel which is subsequently underlain by well-graded sand with gravel and some silt to at least 15 feet below ground surface. TP 2 is overlain with sand with gravel and some silt to depth of the exploration. The percolation rates obtained are as follows: TP1 (Primary) 0.46 minutes per inch TP2 (Secondary) 13.7 minutes per inch Representative soil layer 5.25 to 6.25 feet Representative soil layer 4.25 to 5.25 feet A gradation in TP 1 was performed to acquire sand fiker waiver. Test holes #559 (percolation rate 30 minutes per inch) and #568 (percolation rate 7.5 minutes per inch) conducted for the previously proposed subdivision are located within 30 feet o£TP2. Thus, percolation rate 30 minutes per inch were used for secondary field design as shown in Figures l&2. Groundwater was not encountered in TP1, while it was encountered in TP2 at 12 feet bgs during the exploration and was recorded on May 2, 2014 at a depth of 10 feet bgs. Groundwater was recorded at 8 feet bgs on November 27, 2007 in Test hole #568, and it is considered as high groundwater for secondary field. We are proposing to place a new 1,500-gallon S.T.E.P septic tank with a pressurized discharge system for primary field. The pressurized system is needed to life the effluent to the disposal field. The profile of the discharge pipe is shown in Figure 4. An advanced wastewater system is proposed for the backup system. Locations of the main and the backup trench system are shown on Figure 2. The size of each system was determined by the percolation rates of the test pits within the footprint of each system. If the system is constructed in accordance with our design, the following statements will apply: 1. The system will conform to setback from proposed single family well in the area. 2. The system will comply with setback requirements from property lines. 3. The system will have no adverse impact on reserve space, either surface or subsurface, on any lots located in the area. 4. The system will have no adverse impact on drainage patterns in the area. Page 2 of 3 Winn Residence Bryan Winn June 2014 3687-14 Based on the information presented in this letter, NGE-TFT requests that the MOA grant a septic permit to Creekview Estates Tract A. Please feel free to contact us with any questions or comments you may have concerning the information presented in this letter. Sincerely, Northern Geotechnical Engineering, Inc. d.b.a. Terra Firma Testing, Xiaoxuan (Eva) Ge, E.I.T. Project Engineer Keith F. Mobley, P.E. President Page 3 of 3 rnx~ Municipality of Anchorage Development Services Department Building Safety Division On-Site Water and Wastewater Program 4700 Elmore Road P.O. Box 196650 Anchorage, AK 99507 www.cLanchoraae.sk.us (907) 343-7§94 - Percolation Test Soils Log Performed For: W. Bryan & Andrea Winn Legal Description: Creekview Estates Tract A : Pit - 1 Date Performed: 4/10/14 Township, Range, Section: SE1/4 T12N R3W SEC 35 Site Plan Slope Reading Date Gross Time Net Time Depth to Water Net Drop 5/2/14 10:30 9 WAS GROUND WATER 110-1- ~ v~ l IF YES, AT WHAT DEPTH? L ~ Depth to Water After o ~ - I Monitoring? No E P 17- 18- 19- 20- PERCOLATION RATE 0.46 (minutes/inch) PERC HOLE DIAMETER 6" TEST RUN BETWEEN 5.25 FT AND 6.25 FT COMMENTS Pre-soaking was not necessary. 1:14 13 4.00 1:30 13 4.00 1:50 13 4.00 1:40 13 4.00 1:45 13 4.00 1:50 13 4.00 PERFORMED BY: Northern Geotechnica[ Engineering, Inc. ~ Keith F. Mobley CERTIFY THAT THIS TEST WAS PERFORMED IN ACCORDANCE WITH ALL STATE AND MUNICIPAL GUIDELINES IN EFFECT ON THIS DATE. DATE: 6/5/14 Municipality of Anchorage Development Services Department Building Safety Division On-Site Water and Wastewater Program 4700 Elmore Road P.O. Box 196650 Anchorage, AK gg507 www.ci.anchora~e.ak.us (g07) 343-7904 Soils Log 2- 3- 4- 5- 6- 7- 8- 9- 10- 11- 12- 13- 14- Pedormed For: W. Bryan & Andrea Winn Legal Description: Creekview Estates Tract A Test :r.i - Percolation Test Slope 16- 17- 18- 19- 20- Site Plan WAS GROUND WATER ENCOUNTERED? Yes s L IF YES, AT WHAT DEPTH? 12' o Depth to Water After p Monitoring? 1 O' E Reading Date Gross Time Net Time Depth to Water Net Drop 5/3/14 13:30 7 14:00 30 rain 9.88 2.88 14:00 7 14:30 30 rain 9.25 2.25 14:30 7 15:00 30 rain 9,19 2.19 PERCOLATION RATE 13.7 (minutes/inch) PERC HOLE DIAMETER 6" TEST RUN BETWEEN 4.25 FT AND 5,25 FT COMMENTS Test hole pre-soaked prior to test. PERFORMED BY: Northern Geotechnical Engineering, Inc. I Keith F. Mobley CERTIFY THAT THIS TEST WAS PERFORMED IN ACCORDANCE WITH ALL STATE AND MUNICIPAL GUIDELINES IN EFFECT ON THIS DATE. DATE: 6/5/14 Municipality of Anchorage Development Services Department Building Safety Division On-Site Wa[er and Wastewater Program 4700 Elmore Road P.O. Box 196650 Anchorage, AK 99507 www.ci.a nchoraae.ak, us (907) 343-7904 Soils Log - Percolation Test Performed For: W. Bryan & Andrea Winn Legal Description: Creekview Estates Tract A 5- 6- 7- 8- 9- 10- 11- 13- 14- 15--- 16- 17- 18- 20- Pit - 2 Cont' Date Performed: 4/10/14 Township, Range, Section: SEl/4 T12N R3W SEC 35 Slope Site Plan WAS GROUND WATER ENCOUNTERED? Yes $ IF YES, AT WHAT DEPTH? 12' L O Depth to Water After p Monito~ng? 10' E Reading Date Gross Time Net Time Depth to Water Net Drop 5/3/14 15:00 7 15:30 30 mtn 9.19 2.19 PERCOLATION RATE 13,7 ~inutesanch) PERC HOLE DIAMETER 6" TEST RUN BETWEEN 4.25 FT AND 5.25 F~ COMMENTS Test hole pre-soaked prior to test. PERFORMED BY: Northern Geotechnical Engineering, Inc. I Keith F. Mobley CERTIFY THAT THIS TEST WAS PERFORMED IN ACCORDANCE WITH ALL STATE AND MUNICIPAL GUIDELINES IN EFFECT ON THIS DATE. DATE: 6/5/14 NORTHERN ~ ENGINEERING, INC. / TERRA FIRMA TESTING PROJECT CLIENT: PROJECT NAME: PROJECT NO.: SAMPLE LOC.: NUMBER/DEPTH: DESCRIPTION: DATE RECEIVED: FESTED BY: ?,EVIEWED BY: 100 90 80 ~ 70 ~ 60 ~ 50 ca 40. ~z 30. 20 10 145 W. Bryan & Andrea Winn - Winn Residence 368%14 TP1 SI / 5.25' - 6.25' Well-graded sand w/gravel 5/15/2014 JA XG PARTICLE SIZE ANALYSIS ASTM D422 / C 136 0.01 0.00I Fine SILT or CLAY MOISTURE-DENSITY RELATIONSHIP ASTM D1557 % GRAVEL: 30.4 USC: % SAND: 68.4 USACOE FC: % SILT/CLAY: ~ .02 nnn: SW ASTM D 1557 (uncorrected) pcf ASTM D4718 (corcected) pcf OPTIMUM M.C. (COllected) % NATURAL M.C. 3.2 % SIEVE ANALYSIS RESULT 152.40 6" 76.20 3" 38.10 1.5" 100.0 19.00 3/4" 100.0 12.70 I/2" 97.5 9.50 3/8" 94.6 4.75 /14 69.6 2.00 #10 38.1 0.85 #20 14.7 0.43 #40 6.8 0.25 #60 4.2 0.15 #100 3.0 0.075 #200 1.2 HYDROMETER RESULT TIME ~,llN) (mm) PASS[NO 0 0.5 2 4 30 60 250 1440 HYDRAULIC COND. ASTM D2438) DEGRADATION ATM T-313) PLASTICITY INDEX ASTM 4318 The testing services repo~ted herein have been performed to recognized industry standards, urdess otherwise noted. No other warranty is made. Should engineering I interpretation or opinion be requked, NOE-TFT will provide upon written request. 11301 Olive Lane · Anchorage, Alaska 99515 ' Phone: 907-344-5934 · Fax: 907-344-5993 ' www. nge-tfi, com