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Home My WebLink AboutSTORCK #3 S-7215S MUNICIPALITY OF ANCHORAGE DEPARTMENT OF HEALTH & ENVIRONMENTAL PROTECTION Environmental Health Division CASE REVIEW WORKSHEET CASE NUMBER: DATE RECEIVED: COMMENTS DUE BY: S-7215 July 27, 1983 August 15, 1983 SUBDIVISION OR PROJECT TITLE: Lots 1 - 4 Block 1 Stork Subdivision ~3 ) COMMUNITY WATER AVAILABLE COMMENTS: NHAWTHORNE-ENGINEERING July 7, 1983 NHAWTHORNE ~ ENGIixJ;fE~(!NG 7127 Old S~ward ,qm:h,~ AK 99502 844. 4101 A~q~Ti~' BOULEVARD Mr. John Lynn Mr. Robert Robinson Municipality of Anchorage Department of Health & Environmental Protection 825 L Street Anchorage, Alaska 99501 Re: Subdivision of Tract B1, North Half, Storck Subdivision Addition 2, by Lucille and Mike Johnson MUNICIPALITY OF ANCHORAGE DEPT. OF HEALTH & ENVtRONMENTAL PROTECTION. JUL 1 4 983 _RE_CE_[%ED Dear Messrs. Lynn & Robinson: Enclosed please find my soils and percolation test boring sheets as well as a location sketch for the above referenced property. As you can see, the north edge of the property had high ground water on June 28, 1983 while three test holes on the southern edge are showing ground water between 7 and 11 feet and reasonable percolation rates at shallow depths. An exception is T.H. 5 which has ground water at approximately 18 inches, apparently influenced by a flowing culvert across New Rabbit Creek Road at the east edge of the property. T,H. 4 is down slope from a higher area on Lot 4 and it currently has ground water at 8 feet. I feel we have sufficient area on Lot 4 for a shallow system and replacement. Lot 2 did not end up with a test hole near its south side because lot lines were not drawn until the test hole results were known several days after drilling. It appears that an area similar to T.H. 1 or T.H. 6 can be found on Lot 2. Of course it is your decision whether the owners will have to order additional test and perc hole borings before final subdivision approval. Sincerely, / ~, ............. Neil Hawthorne NH/rip 1983 PERFORMED FOR: LEGAL DESCRIPTION: ~3 14 COMMENTS PERFORMED BY: MUNICIPALITY OF ANCHORAGE DEPAR~,~"C%NT OF HEALTH AND ENVI RONMENTAr'-*',~OTECTION L c~C ~ PERCOLATION TEST L, Street, Anchorage, Alaska 99501 264~/z0 I SOILS LOG - PERCOLATION TEST /~ /1, SLOPE SITE PLAN _1 L_lll I I I I I ~1 I I I I WASENcOUNTERED?GROUND WATER 2 "~ ~x- 7' S L E IF YES, AT WHAT DEPTH? ]~/- ' Gross Net Depth to Net Reading Dale Time Time Water Drop ~ ¢¢ 1:~8__. _?; Fo ~ _3 '- ~, '~4~; PERCOLATION RATE TEST RUN BETWEEN {minutes/inch) FT AND ~ ~"-- FT MUNICIPALITY OF ANCHORAGE DEPAR~C"~"NT OF HEALTH AND ENVIRONMENTA~"F/:~OTECTION PERFORMED FOR: ~.- L.) E7 I' ]/r~ LEGAL DESCRIPT,ON: /~ , ~ L {FEET) 4 10 13 COMMENTS f, PERFORMED PERCOLATION TEST 825 L. Street, Anchorage, Alaska 99501 264-4720 SOILS LOG - PERCOLATION TEST SLOPE SITE PLAN I_1 WAS GROUND WATER ENCOUNTERED? IF YES, ATWU~' / ~ '.~ DEPTH? ~ - I G~s Net Depth to Net Reading Date Time Time Water Drop i 7/,:::-/,¢,, 7; i~;~1 ~ ~ '_ 7" .Z_.~z_ _ ~ PERCOLATION RAT,~_ ~ 7 ,/ Iminute,/inch) ( TEST RUN BE~I,¥EEk~L~ AND " FT SOILS LOG MUNICIPALITY OF ANCHORAGE [] PERCOLATION DEPARTMENT OF HEALTH AND ENVIRONMENTAL PROTECTION TEST 825 L. Street, Anchorage, Alaska 99501 264~4720 SOILS LOG- PERCOLATION TEST /'~'7, ,/9), ~ z. ~'' PE,*OR"."ED CO": L-,...'¢, / (¢ LEGAL DESCRIPTION: ~ 4 SLOPE SITE PLAN 8 9- 10- 11 13- 14- 15- 16 17 18 19 20 I II Reading Date Time Time Water Drop PERCOLATION RATE {minuTes/inch) COMMENTS TEST RUN BETWEEN FT AND -- FT MUNICIPALITY OF ANCHORAGE DEPART!'~"NT OF HEALTH AND ENVIRONMENTAt?'-~IOTECTION [] PERCOLATION TEST B25 L. Street, Anchorage, Alaska 99501 264~72~ SOILS LOG - PERCOLATION TEST - /-~ /L/, 5~ LEGAL DESCRIPTION: DEPTH (FEET) 2 X' 3 -- 6 7 8 9- 10 11 12 13 14 15- 16- 17- 18 19 SLOPE WAS GROUND WATER ENCOUNTERED? IF YES, ATWHAT DEPTH? SITE PLAN I ~ ,~ fk I I I Gross Net Deplh to Net R~ading Date Tim~ Time Water Drop 20 PERCOLATION RATE TEST RUN BETWEEN FT AND COMMENTS PERFORMED BY: /~L~ CERTIFIED BY: (minutes/inch) FT DATE: ;/~. MUNICIPALITY OF ANCHORAGE ~ PERCOLATION DEPARTed? OF HEALTH AND ENVIRONMENTAL,B~%'~TECTION, TEST L Street, Anchorage, Alaska 99501 264-47k~ ' SOILS LOG -- PERCOLATION TEST ~ ]-], $~- '~' 1 2 7z'~/&'.; 10 11 12 13 14 15 16- 17- 18- 19- 20- COMMENTS SITE PLAN I ~1"L~ I III IIII I I I I II_ II I I I TEST RUN BETWEEN PERFORMED ~L~~' SOILS LOG MUNICIPALITY OF ANCHORAGE [] PERCOLATION DEPARTMENT OF HEALTH AND ENVIRONMENTAL PROTECTION TEST l]25 b Street, Anchorage, Alaska 99501 2644720 soILS LOG -- PERCOLATION TEST ~ /L/. :),]. ~' "EREOR~ED POR: L-vt,//~ ~,,, 7 8 9 10 11 12 13 14 16- 17- 18- 19- 20- SLOPE SITE PLAN / II I I I I was ~*OUND WA~ER ENCOUNTERED? P IF YES, AT WHAT E DEPTH? Illl Gross Net Deplh ~o Net Reading Da~e Time Time Water Drop PERCOLATION RATE TEST RUN BETWEEN COMMENTS DEPARTMENT OF HEALTH AND ENVIRONMENTAL PROTECTION SOILS LOG -- PERCOLATION TEST ~,/b//, PERPOR EO POR: SLOPE SITE PLAN 1 6 ~0 ~4 16 17 ~8 ~0- ~NTERED? ' ~? ?/ O P E DEPTH? PERCOLATION RATE 4 TEST RUN BETWEEN / .b.~ - FT AND ~k,:'~.,I, ~ g~L__k'~ ~',, , q~'rC CERTIFIED BY: MUNICIPALITY OF ANCHORAGE DEPARTMENT OF HEALTH AND ENVIRONMENTAL PROTECTION 825 L. Street, Anchorage, Alaska 99501 264-4720 SOILS LOG -- PERCOLATION TEST SOILS LOG 1 2 3 4 5 6- 7- 8- 9- 10- 11 12 13 14 15 16 17 18 19 20 SLOPE SITE PLAN I I S P E IF YES, AT WHAT DEPTH? Gross Net Depth to Net Reading Date Time Time Water Drop PERCOLATION RATE TEST RUN BETWEEN 2 ti. FT AND (minutes/inch) DATE: PERFORMED FOR: LEGAL DESCRIPTION: 1 2 3 4 5 6 .7 8 9- 10- 11 12 13 14 15 16 17 18 19 20 ) MUNICIPALITY OF ANCHORAGE DEPARTMENT OF HEALTH AND ENVIRONMENTAL PROTECTION [] SOILS LOG PERCOLATION TEST 825 L. Street. Anchorage, Alaska 99501 264-4720 SOILS LOG - PERCOLATION TEST SLOPE IJ ~VAS GROUND WATER ENCOUNTERED? IF YES, AT WHAT DEPTH? "fl DATE PERFORMED:~ ///It, ~%.¢,..( ,,',,, I I TEST RUN BETWEEN '~ '~') FT AND ¢%~' . FT PERFORMED BY: Jd-f CERTIFIED BY: /d-f DATE: PERCOLATION RATE _-- '~ (mlnules/Jnch) Gross Net Depth to Net Reading Date Time Time Water Drop t 8,11o~ E;; ~- .... _;C.: :~_'/~ .~ ~ 7~,, .............................. ~,;~ ,, ~, ,~ P .' ~, ,~ ~, ..... . " NHAWTHORNE-ENGINEERING NHAWTHORNE - ENGINEERING 7127 Old Seward k,~, Anch., AK 99502 844-4711 August 11, 1983 Mr. John Lynn Municipality of Anchorage Department of Health & Environmental 825 L Street Anchorage, Alaska 99501 Protection Re: Tract B1, North Half, Stork Subdivision Addition II Mike and Lucille Johnson - Case No. S7215 Dear Mr. Lynn: Please accept this as my August reading of ground water levels and percolation reports that you requested on the above described property. I understand that your comments for the subdivision revie~.w~x~ea~ by August 15, 1983. Ground Water Level Readings - August 10, 1983 T.H. i - 14.0 feet below surface~ T.H. 2 - 2.5 feet below surface/ T.H. 3 - 6.0 feet below surface o T.H. 4 - 10.5 feet below surface ~.~ '~,~:o,, c~-4369 ,.'~r~ T.H. 5 - 1.5 feet below surfacez/' ~Z~e~m~'°o, ....... ,'~.~ T.H. 6 - 9.5 feet below surface You had asked for two additional percolation tests which are included herein. Note that the acceptable water levels and percolation tests are all on the high side of the lots. Also note that the percolation test holes are fairly shallow. We have oversized the lots to make sure area exists for shallow bed systems but eventual property owners may have to pump their septic tank effluent if the houses are located very far from New Rabbit Creek Road. Of course, pumped dosing has the advantage of extending the field life because it has frequent opportunity to dry out. When leach field systems are designed for shallow soils two very important things must be remembered. ~ ~./'~/ ,~I, ~ ..~ ~ Municipality of Anchorage Mr. John Lynn August 11, 1983 Page 2 1. The soils are not generally densely packed which results in rapid percolation rates. Subsequent saturation of these loose soils by a leach field may have the affect of significantly compacting them, thereby increasing the percolation rate value (minutes/inch). 2. Contractors often do not realize the importance of keeping equipment off of an excavated bed area. Additional inspection may be required. Let me know if further information is needed on this case. Sincerely, Nell Hawthorne, P.E. NH/np