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Home My WebLink AboutROCKHILL S-4704 CASE NUMBF-,R S-4704 REVISED PETITION FOR ~I~fiZON I NG SP~C~AL [X¢[~T~OU VACATION R E.6~BDIVlSION DATE RECEIVED ~5. COMMENT TO PLANNING '~Y ?? DEPARTMENT OF HEALTH AND ENVIRONMENTAL PROTECTION PLATTING OR PLANNING AND ZONING CASE REVIEW PRELIMINARY oFH.V. Lounsbury & Assoc. for Plat of Rockhill ~ Revised - a subeivision of ~he EAS~ i/4 i~W i/2 Set 14., T12N,R3W,S.M. Ak, containing 80.0 acres FOR MEETING OF May 15, 1978 __._~._ ~ ~'~ [ Cases COMMENTS: ENVIRONMENTAL SANITATION: PUBL C WATER-,%'O~AVAILABLE ' ~ ~ PUBLIC SEWER ~OT AVAILABLE TO SERVICE PETITION AREA. / ENVIRONMENTAL ENGINEERING: 71-O14 (9/76) -+4,60' -~ ~70 ' ~r~¢r~ S470~ t~AY 1 5 tq?~ hfe~hod Used __ F~ld Parly V/~ther L U~ Ut' I I::.'~1 ~Jb'i(i~d ~. ewitl' V. Lounsbury ~ ~4$soci~! Engineers Surveyors ~nchor~e, R Hol~ No Sheet ~ of . Total Depth $omplin~ Time DE$CHIPTIO~I Soil typ-% co,or, l~xture, estimoted porhcl.~ siz~ ~m~ter driving not~s, depths ¢t~¢~lot~n Io$1~ bits used, etc. $Cmplin~ estirnglbd porHclz ~ize~ Sam~ler drlving depths circoloh~n ,votes on dril/~n~ bils used, etc_ of , VJ~t_~r Tuble Locot,'on t,'o;e$ £ Vegelolion: DHSC~. I ? TI OH sample~ drl~in9 notes. depths cHcul~hon lOSt, bits uses', etc. -- --'-T Locot,'on ,t/ores £ ~gi~;!rom: LOB 01:' TEST BO£1NG H~w£It V. Lounsbury ( ~$$oc/ote$ Sheet __ Ancfloro~'e, . ~tosho I ?fo_u. d epth m DE$CRIPTIOh! J so~npl~ drlvin~ nol~s, depths circulol~bn lost, bHs used, etc. '~'~itt V. Loun~b,ary ~ Anchoru.y-% Ground ,"/~, _ Table Tt7~' .e O~$Cf'?It~TIO'~t ~Coil type, coTor, ;~xlvfe, sumple~ drlvin2 nol6's, o'~pth~ c~Pc'ui~h~n t Locotmn f,'o:-~$ £ ,OLq~rom: Ve.qetolion: DICKINSON-QSWALD-WAI~I-LEE ENGINEERS 4040 "B" Street ANCHORAGE, ALASKA 99503 TO GENTLEMEN: WE ARE SENDING YOU [] Shop drawings [] Copy of letter Phone (907) 278-1551 : >. , I ' f- . i qq al ~'A~ached ~ Under via separate cover ~ Prints ~ Plans ~ Change order [] Samples [] Specifications items: COPIES DATE HO. DESCRIPTION THESE ARE TRANSMITTED as checked below: [] For approval [] For your use '~(' As requested [] For review and comment [] FOR BIDS DUE [] Approved as submitted [] Approved as noted [] Returned for corrections [] Resubmit [] Submit__ [] Return copies for approval .copies for distribution corrected prints 19 __ [] PRINTS RETURNED AFTER LOAN TO US COPY TO SIGNED: 4040 "B" STREET ANCHORAGE, ALASKA 99503 (907) 278-1551 March 15, 1979 W.O. #Dl11.39 Dean Tompson/Lawyers Title P. O. Box 3-3772 ECB Anchorage, Alaska 99501 Subject: Subsurface Investigation for Suitability for On-Site Sewage Disposal, Rockhill Acres Gentlemen: At your request we have conducted a series of percolation tests in borings drilled in May, 1978, in Rockhi!l Acres. Rock~ill Acres is located off Abbott Road in the lower hillside area of Anchorage, Alaska as shown on the vicinity map, Figure 1. On February 26, 1979 we submitted to you the test logs of the nineteen test borings drilled during the May 1978 program~ along with laboratory test results. After the borings were drilled a 3/4" slotted .PVC pipe was inserted into each hole t:o keep the hole open in case of caving and to aid in measuring th~ free water level. However, percolation tests were not conducted at that time. Recently, we have attempted to locate those borings; however, -heavy. snow cover obscured the boring locations and we were only able to locate six. The PVC pipes were checked, to confirm that no plugging had occurred The pipes were then filled with water and left over night to saturate. On returning the next day the pipes were refilled and the change of water level carefully monitored over the next 60 minutes. Rates reported on the following p~ge represent the slowest percolation rate observed during the 60 minute observation. Dean Thompson March 15, 1979 Page Two ~ It is our opinion that on-site wastewater disposal systems may~ be constructed on all lots in this subdivision in conformance with Municipality of Anchorage, Department of Public Health and Environmental Protection regulations. Table 2 lists the observed percolation rates and ~~_~._rates for those lots on which percolation tests were not condUcted~ ~h9 ~s~imat~ percolation rates were determined by comparing soli ty~%s and terrain feat~__ures wi__th are__as wh_~r~ percolation te-~s were conduc e~.' We feel confident that the values are generally cOnservative. It may be possible to lower the design percolation value on some lots by actually placing a test hole and running a percolation test on that specific lot. If the testing can shorten the required absorption terrain by a length of 10 to 15 feet it may save the cost of the test in reduced construction costs. Ail seepage pit, leech field, absorption trench excavations should be inspected prior to backfilling to assure that actual soil conditions do not vary substantially from those assumed in our analys~s. The nineteen test borings, drilled in May~ ].978, were drilled · with a solid flight auger rig, is owned by Denali Drilling Co., Inc. The drilling was supervised and the test holes logged by Mr. O.M. Hatch, Alaska Testlab senior Geologist. As samples were recovered, the test holes were logged and the soils visually classified. Samples were then sealed in plastic bags to protect the natural moisture content. In the laboratory, the moisture content and dry strength of each sample was determined. Samples of similar color, texture, particle size distribution were grouped together and given an arbitrary group designation. Grain size analysis was then performed on composite samples of important groups rather than on the individual samples. The general soil types encountered on this project are listed in Table 3 by their group designation. Supplementing this subsurface information, we have used the test pit logs from a preliminary investigation by Lounsbury and Associates° The location of these test pits and our test boring locations are shown on the'plot plan attached to this report in an envelope. Soils generally consist of silty sands and gravel. One boring did encounter relatively clean gravel and several borings'encountered sandy silt. No ground water was encountered. Dean Thompson March 15, 1979 Page Three In an area that was used for a gravel barrow pit, significant quantities of unclassified fill has been placed during or prior to regrading operations. This fill'was placed without proper compaction controls and contains organics, garbage, and other unsuitable material in some areas. We strongly recommend that a foundation investigation be conducted on each lot in Block 2 prior to construction of residential structures. We also recommend that additional information be obtained prior to construction of Main Tree Drive and Platinum Circle. The following plates and tables are attached and complete this report: Table A Observed Percolation Rates Table B S~te Waste-Water System Design Criteria Table C Description of Soil Groups Table D Summary of Test Pit Logs by Lounsbury and Associates Table E-W Test Boring Logs Sheets 1-6 Grain Size Distribution Curves Sheets 7-9 Explanitory Information It is trusted that this information meets your present requirements. If you have any questions or if we may be of further assistance, please do not hesitate to contact us. Very sincerely, ALAS ICA TESTLAB James R. Finley, Jr. APPROVED: · Melvin R. Nicholst P.E. Laboratory Supervisor 0 ~0 0 0 0 oooo oo~o 0 ~H 0 0 C-'lO ~ ~oo ooo ooooo ~oo o oooo oo o ! Z 0 0 O~ o co00 0 H 0 0 I 0 .~-I 0 ~0 'fABLE C DESCRIPTION OF SOIL GROUPS GROUP SOIL TYPE UNIFIED CLASSIFICATION FROST SUSCEPTIBILITY CLASSIFICATION ESTImaTED PERCOLATION RATE (MIN/IN) A B C D E F Sandy Gravel with some silt Sandy Gravel Silty Gravelly Sand (20% Gravel) Silty Gravelly Sand' (30% Gravel) sandy Silt with trace fine gravel Silty Sand with trace fine gravel GM GW SM SM ML SM F1 NFS NFS , F2 F2 F4 F2, F4 3 12 10 15 TABLE D SUMMARY OF TEST PIT LOGS By Lounsbury & Associates TEST PIT DEPTH PREDOMINATE SOIL TYPE 3 0.5-1 .5 I .5-3.5 3.5-11+ 2-5,5 5.5-1 I. 5+ 2.5-8.5+ 1.5-4.5 4.5-8.5 1.5-9.5 0.5-4.0 4.0-4.5 4.5-9.5+ Silty Sand Gravelly Sand Sandy Gravel Gravelly Sand Sandy Gravel Sandy Gravel with Silt Layer at 4.5 Gravel~.y.S~nd- ~rave!_ Sanfly Craval ~9i lty Sa~n~t~ Gravelly Sand NOTE: Soil descriptions from Lounsbury & Associates logs. Were not logged by Alaska Testlab or DOWL Engineers. Test Hole #1 Table E WO #D11139 Logged By: O.M. Hatch Date: May 23, 1978 Depth in. Feet From To 0.0' - 6.0' 6.0' - 16.0' Soil Description F-2, brown very Silty Gravell~ Sand (SM), occasional cobbles, damp, medium density, rounded particles to 8" F-l, brown slightly Silty Sandy Gravel (GM), damp, medium density, rounded and subrounded particles to 3" Bottom of Test Hole: Frost Line: Free Water Level: 16.0' None Observed None Observed Sample Depth 1 5.0' 2 10.0' 3 16.0' Type of Dry M% Sample Strength Group Unified 5.9 G N A GM 3.5 G N A GM 4.6 G N A GM Remarks: 1. 3. 4. 5. 6. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see Sheet 1. Frost and Textural Classification, see Sheet 2. Unified Classification, see Sheet 3. Test Hole #2 Table F WO #Dl1139 Logged By: O.M. Hatch Date~ May 23, 1978 Depth in Feet From To 0.0' 1.0' 1.0' 6.0' 6.0' 8.0' 8.0' - 14.0' 14.0' - 16.0' Soil Description Brown Peat (Pt), damp, soft. NFS, brown very Sandy Gravel (GW), well graded, damp, medium density, rounded particles to 1" NFS, brown Sand (SW), well graded, damp, medium dens~-~y. NFS to F-2, brown fine Silty Sand, damp to saturated, medium density. F-2, brown Silty Gravelly Sand (SM), saturated, medium density, rounded particles to 1" Bottom of Test Hole: Frost Line: Free Water Level: 16.0' None Observed 11.0' Sample Depth 1 5.0' 2 10.0' 3 16.0' Type of Dry M% Sample Strength Group Unified 4.3 G N B GW 20.9 G N-L C SM 13.3 G L D SM Remarks: 1. e 3. 4. 5. 6. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see Sheet 1. Frost and Textural Classification, see Sheet 2. Unified Classification, see Sheet 3. Test Hole #3 Table G WO #Dl1139 Logged By- O.M. Hatch Date: May 23, 1978 Depth in Feet From To 0.0' - 1.0' 1.0' - 7.0' 7.0' - 16.0' Soil Description Brown Peat (Pt), damp, soft. F-2, brown Silty Gravelly Sand (SM), few cobbles, damp, medium dens~V~, rounded and subrounded particles to 6". F-2, brown Sandy Silt (SM), damp, stiff, NP, becoming siltier (ML) below 12'. Bottom of Test Hole: Frost Line: Free Water Level: 16.0' None Observed None Observed Sample Depth I 5.0' 2 10.0' 3 16.0' Type of Dry M% Sample Strength Group Unified 9.1 G L D SM 10.5 G L E ML 15.8 G NL E ML Remarks: 1. 3. 4. 5. 6. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see Sheet 1. Frost and Textural Classification, see Sheet 2. Unified Classification, see Sheet 3. Test Hole #4 Table H WO #Dl1139 Logged By: O.M. Hatch Date': May 23, 1978 Depth in Feet From To 0.0' - 1.5' 1.5' - 6.0' 6.0' - 16.0' Soil Description Brown Peat (Pt), damp, soft. F-2, brown very Silty Gravelly Sand (SM), damp, medium density, subrounded particles to 3" all sand sizes. F-2, brown Silty Sand (SM), fine grained, damp, medium d-~s~ty. Bottom of Test Hole: Frost Line: Free Water Level: 16.0' None Observed None Observed Sample Depth ~1 5.0' 2 10.0' 3 16.0' Type of Dry M% Sample Strength Group Unified 9.5 G N-L E 6.4 G N-L F 6.9 G N-L F Remarks: 1. 3. 4. 5. 6. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see Sheet 1. Frost and Textural Classification, see Sheet 2. Unified Classification, see Sheet 3. Test Hole #5 Table I WO #Dl1139 Logged By: O.M. Hatch Date~ May 23, 1978 Depth in Feet From To 0.0' - 1.0' 1.0' - 6.0' 6.0' - 16.0' Soil Description Brown Peat (Pt), damp, soft. NFS, brown Sandy Gravel (GW), occasional cobbles, damp, medium density, rounded particles to 6". F-l, brown Silty Sandy Gravel (GM), occasional cobbles, damp, medium to high density, rounded particles to 6". Bottom of Test Hole: Frost Line: Free Water Level: 16.0' None Observed None Obseryed Sample Depth 1 5.0' 2 10.0' 3 16.0' Type of Dry M% Sample Strenqth Group Unified 11.1 G N A GM 4.4 G N A GM' 3.6 G N A GI~ Remarks: 1. 3. 4. 5. 6. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see Sheet 1. Frost and Textural Classification, see Sheet 2. Unified Classification, see Sheet 3. Test Hole 96 Table J WO #Dl1139 Logged By: O.M. Hatch Date: May 23, 1978 Depth in Feet From To 0.0' - 0.5' 0.5' - 1.5' 1.5' - 16.0' Soil Description Brown Peat (Pt), damp, soft. F-l, brown Silty Sandy Gravel (GM), damp, medium density, rounded particles to 3". NFS, brown Sandy Gravel (GW), damp, medium density, lacks fihe sands, rounded particles to 3". Bottom of Test Hole: Frost Line: Free Water Level: 16.0' None Observed None Observed Sample Depth 1 5.0' 2 10.0' 3 16.0' Type of Dry M% Sample Strength Group unified 3.6 G N B GW 3.4 G N B GW 3.7 G N B GW Remarks: 1. e 3. 4. 5. 6. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see Sheet 1. Frost and Textural Classification, see Sheet 2. Unified Classification, see Sheet 3. Test Hole #7 Table WO #D11139 Logged By: O.M. Hatch Date: May 24, 1978 Depth in Feet From To 0.0' - 2.0' 2.0' - 5.5' 5.5' - 16.0' Soil Description Brown Peat (Pt), damp, soft. F-4, brown Sandy Silt (ML), damp, stiff, NP. F-l, brown Silty Sandy G~avel (GM), damp, medium density, rounded particles to 2". Bottom of Test Hole: Frost Line: Free Water Level: 16.0' Trace .~ None Observed Sample Depth I 5.0' 2 10.0' 3 16.0' Type of Dry M% Sample Strength Group Unified 23.2 G L-M E ML 5.2 G N F SM 8.2 G L D SM Remarks: 1. 3. 4. 5. 6. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see Sheet 1. Frost and Textural Classification, see Sheet 2. Unified Classification, see Sheet 3. Test Hole #8 Table WO #Dl1139 Logged By: O.M. Hatch Date:. May 24, 1978 Depth in Feet From To 0.0' - 1.5' 1.5' - 7.0' 7.0' - 10.0' 10.0' - 16.0' Soil Description Brown Peat (Pt), damp, soft. F-4, brown Sand~ Silt (ML), damp, stiff, NP, trace gravel. F-2, brown Silty Gravelly Sand (SM), damp, medium density. F-l, brown ~ilty Sandy Gravel (GM), occasional cobbles, damp, dense, rounded particles to 12". Bottom of Test Hole: Frost Line: Free Water Level: 16.0' Trace None ObServed Sample Depth 1 5.0' 2 10.0' 3 16.0' Type of Dry M~ sample ~trength Group Unified 18.7 G N-L E ML 11.0 G N D SM 11.8 G N A GM Remarks: 1. e 3. 4. 5. 6. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see Sheet 1. Frost and Textural Classification, see Sheet 2. Unified Classification, see Sheet 3. Test Hole #9 Table WO #Dl1139 Logged By: O.M. Hatch Date~ May 24, 1978 Depth in Feet From To 0.0' - 14.0' 14.0' - 16.0' Soil Description F-2, brown fine Silty Sand (SM), damp, medium density, trace gravel to 6' F-4, brown Sandy Silt (SM), damp, stiff, NP. Bottom of Test Hole: Frost Line: Free Water Level: 16.0' Sample Depth 1 5.0' 2 10.0' 3 16.0' Type of Dry M% Sample Strength Group Unified 11.8 G N C SM 7.9 G N C SM 19.4 G L-N SM Remarks: 1. e 3. 4. 5. 6. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see Sheet 1. Frost and Textural Classification, see Sheet 2. Unified Classification, see Sheet 3. Test Hole #10 Table N WO #Dl1139 Logged By: O.M. Hatch Date: May 24, 1978 Depth in Feet From To 0.0' - 2.0' 2.0' 5.0' 5.0' - 6.0' 6.0' - 12.0' 12.0' - 16.0' Soil Description Brown Peat (Pt), damp, soft. F-l, brown Silty Sandy Gravel (GM), damp, medium density, rounded and subrounded particles to 3" NFS, brown Sandy Gravel (GW), damp, medium density, subrounded particles to 2" F-4, brown Sandy Silt (SM to ML), with fine Sand, damp to wet, medium density, F-l, brown Silty Sandy Gravel (GM), damp, medium density, rounded particles to 3". Bottom of Test Hole: Frost Line: Free Water Level: 16.0' Remarks: None Observed See Remarks wet at 11.0' Sample Depth 1 5.0' 2 10.0' 3 16.0' Type of Dry M% Sample Strength Group Unified 7.1 G N B GW 16.4 G N E ML 9.1 G N A GM Remarks: 1. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. 2. Dry Strength, N=None, L=Low, M=Medium, H=High. 3. Group refers to similar material, this study only. 4. General Information, see Sheet 1. 5. Frost and Textural Classification, see Sheet 2. 6. Unified Classification, see Sheet 3. Test Hole #11 Table O WO ~Dl1139 Logged By: O.M. Hatch Date: May 25, 1978 Depth in Feet From To 0.0' - 0.5' 0.5' - 7.0' 7.0' ' 11.0' 11.0' - 16.0' Soil Description Brown Peat (Pt), damp, soft. F-2, brown Silty Gravelly Sand (SM), damp, medium density,' rounded '~'a~ticles to 2", becoming less sil%y with depth. F-4, brown Sand~ Silt (ML), damp, s~iff, NP. F-2, brown Silty Gravelly Sand' (SM), occasional cobbles, damp, medium density, rounded particles to 12" Bottom of Test Hole: Frost Line: Free Water Level: 16.0' None Observed None Observed Sample Depth I 5.0' 2 10.0' 3 16.0' Type of Dry M% Sample Strength Group Unified 9.4 G N D SM 17.4 G L E ML 11.8 G N F SM Remarks: 1. 3. 4. 5. 6. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see Sheet 1. Frost and Textural Classification, see Sheet 2. Unified Classification, see Sheet 3. Test Hole $12 Table P WO #Dl1139 Logged By~ O.M. Hatch Date~ May 25, 1978 Depth in Feet From To 0.0' - 3.0' 3.0' - 16.0' Soil Description F-2, brown Silty Gravelly Sand (SM), damp, medium density, rounded particle's to 3". F-2, brown fine Silty Sand (SM), trace gravel, damp, medium density. Bottom of Test Hole: Frost Line: Free Water Level: 16.0' None Observed None Observed Sample Depth 1 5.0' 2 10.0' 3 16.0' Type of Dry M% Sample ~trength Group Unified 9.1 G N F SM 5.2 G N F SM 10.0 G N-L F SM Remarks: 1. 3. 4. 5. 6. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see Sheet 1. Frost and Textural Classification, see Sheet 2. Unified Classification, see Sheet 3. Test Hole #13 Table Q WO #Dl1139 Logged By: O.M. Hatch Date: May 25, 1978 Depth in Feet From To 0.0' - 16.0' 16.0' - 20.0' Soil Description Brown Peat, silt, wood, sand, gravel, mixed, fill, soft to stiff, very soft to 5' damp F-2, brown fine Silty'Sand (SM), damp, medium density. Bottom of Test Hole: Frost Line: Free Water Level: 20.0' Sample Depth 1 5.0' 54.4 2 10.0' 42.7 3 16.0' 62.7 4 20.0' 7.8 Type of Dry M% Sample Strength Group Unified G N - - G N - - G N - - G N F SM Remarks: 1. e 3. 4. 5. 6. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see Sheet 1. Frost and Textural Classification, see Sheet 2. Unified Classification, see Sheet 3. Test Hole #14 Table R WO #D11139 Logged By: O.M. Hatch Date: May 25, 1978 Depth in Feet From To 0.0' - 8.0' 8.0' - 13.0' 13.0' - 16.0' Soil Description Brown Silt, peat, wood, sand, gravel, mixed, fill, damp, stiff. F-4, brown Gravelly Sandy Silt (ML), damp, stiff, NP, very sandy 8-9' F-2, brown Silty Gravelly Sand (SM), damp, medium to high density, rounded and subrounded particles to 3". Bottom of Test Hole: Frost Line: Free Water Level: 16.0' None Observed None Observed Sample Depth 1 5.0' 2 10.0' 3 16.0' Type of Dry M% Sample Strength Group Unified 28.7 G N - - 11 .4 G L-N E ML 8. I G N D SM Remarks: 1. 3. 4. 5. 6. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see Sheet 1. Frost and Textural Classification, see Sheet 2. Unified Classification, see Sheet 3. Test Hole #15 Table S WO #Dl1139 Logged By: O.M. Hatch Date:. May 25, 1978 Depth in Feet From To 0.0' - 4.0' 4.0' - 10.0' 10.0' - 16.0' Soil Description F-2, brown Silty Sand (SM), fine and medium grained, wet, low density, fill. F-2, brown Silty Sand' (SM), fine and medium grained, medium density, damp. F-4, brown Gravelly Sandy. Silt (SM to ML), damp, stiff, NP, rounded and subrounded particles to 3" Bottom of Test Hole: Frost Line: Free Water Level: 16.0' None Observed None Observed Sample Depth 1 5.0' 2 10.0' 3 16.0' Type of Dry M% Sample Strength Group Unified 11.5 G L F SM 9.2 G N-L E ML 5.6 G N F SM Remarks: 1. e 3. 4. 5. 6. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see Sheet 1. Frost and Textural Classification, see Sheet 2. Unified Classification, see Sheet 3. Test Hole #16 Table T~ WO #Dl1139 Logged By: O.M. Hatch Date: May 26, 1978 Depth in Feet From To 0.0' - 3.0' 3.0' - 16.0' Soll Description F-4, brown Gravelly Sandy. Silt (ML), with wood, damp, stiff, NP. F-l, brown ~ilty Sand~ Gravel (GM to GP-GM), damp, medium density, rounded particles to 2" above 11', particles to 6" below 11' Bottom of Test Hole: Frost Line: Free Water Level: 16.0' None Observed None Observed Sampl~ Depth 1 5.0' 2 10.0' 3 16.0' Type of Dry M% Sample Streng~ Group Unified 1.6 G N A GM 3.2 G N A GM 1.7 G N A GM Remarks: 1. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. 2. Dry Strength, N=None, L=Low, M=Medium, H=High. 3. Group refers to similar material, this study only. 4. General Information, see Sheet 1. 5. Frost and Textural Classification, see Sheet 2. 6. Unified Classification, see Sheet 3. Test Hole #17 Table U WO #D11139 Logged By: O.M. Hatch' Date:' May 26, 1978 Depth in Feet From To 0.0' - 13.0' 13.0' - 16.0' Soil Description F-2, very ~ Gravelly Sa~.nd (SM), damp, medium density, ~~artlcles to 2", less silt and gravel at 6.5'-8.0', fine and medium sand sizes. F-2, brown Silty Sand (SM), fine and medium grained, damp, medium density. Bottom of Test Hole: Frost Line: Free Water Level: 16.0' None Observed None Sample Depth I 5.0' 2 10.0' 3 16.0' Type of Dry M% Sample Strength Group Unified 5.9 G N F SM 5.1 G N D ML 3.5 G N F SM Remarks: 1. e 3. 4. 5. 6. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see Sheet 1. Frost and Textural Classification, see Sheet 2. Unified Classification, see Sheet 3. Test Hole #18 Table V WO #Dl1139 Logged By: O.M. Hatch Date: May 26, 1978 Depth in Feet From To 0.0' - 4.0' 4.0' - 8.0'' 8.0' - 12.0' 12.0' - 16.0' Soil Description Brown Silty Gravelly Sand (SM), fine grained, damp, medium density, rounded and subrounded particles to 3". F-2, brown Silty fine Sand (SM), trace gravel, damp, medium density. F-2, brown.Silty Gravelly Sand (SM), well graded, damp, medium density, rounded particles, to 2". F-2, brown Silty Gravelly Sand, (SM), fine and medium grained, damp, medium density, rounded particles to 2" Bottom of Test Hole: Frost Line: Free Water Level: 16.0' None Observed None Observed Sample Depth 1 5.0' 2 10.0' 3 16.0' Type of Dry M% Sample Strength Group Unified 3.9 G N C SM 4.0 G N F SM 9.3 G N-L D SM Remarks: 1. 3. 4. 5. 6. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see Sheet 1. Frost and Textural Classification, see Sheet 2. Unified Classification, see Sheet 3. Test Hole #19 Table W WO #Dl1139 Logged By~ O.M. Hatch Date: May 26, 1978 Depth in Feet From To 0.0' - 1.0' 1.0' - 8.0' 8.0' - 13.0' 13.0' - 16.0' Soil Description Brown Peat (Pt), damp, soft. F-2, brown Gravelly Sandy Silt (SM), with fine sand, damp, stiff, NP, rounded particles to 2" F-4, brown Gravelly Sandy Silt (SM), damp, stiff, NP,.rounded particles to 2". F-2,' brown Silty Sand (SM), with trace gravel, fine grained, damp, medium density. Bottom of Test Hole: Frost Line: Free Water Level: 16.0' None Observed None Observed Sample Dept~ 1 5.0' 2 10.0' 3 16.0' Type of Dry M% Sample Strength Group Unified 7.3 G N E SM 7.1 G N E SM 9.1 G N E SM Remarks: 1. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. 2. Dry Strength, N=None, L=Low, M=Medium, H=High. 3. Group refers to similar material, this study only. 4. General Information, see Sheet 1. 5. Frost and Textural Classification, see Sheet 2. 6. Unified Classification, see Sheet 3. 0 0 0 0 0 0 0 0 0 0 .t 0 O 0 o o ~ _o o ~o ~ g o o Test Hole Lo9 - Description Guide The soil descriptions showtt on the logs are the best estimate of the soil's characteristics at the time of field examination and as such do not achieve the precision of a laboratory testing procedure. If the log includes soils samples, those samples receive an independent textural classification in the laboratory to verify the field exantination. The logs often include the following items: Depth Interval - usually shown to 0.1 foot, within that zone no significant change in soil type was ob~rved through drill action, direct observation or sampling. Frost Classification - NFS, FI, F2, F3, F4, see "Soil CLassification Chart" Texture .f Soil - An engineering classification of the soils by particle s~ze and !.~oportion, see "Soil CLassification Chart", note the proportio.s are approximate and m.difications to the soil group due to stratification, inclusious and changes in properties are included. Moisture Content ~. this is a qualitative measure: d.~z, .o or little apparent surface moisture, damp, moisture forms portion of color, less than plastic limit, wet, no free water, often soft, if cohesive soil, saturated, free water may be squeezed out, ifa free draining soil; diDtcnt at nat~.ra! moisture conte.t, if a ~.~n-plasHc silt or fine sand. (The moisture content is further definedby reference to PI, LW, NP, M% or dilatency.) Density - refers to more-or-less non-cohesive soils, such as sand gravel mixtures with or without a fine fraction, derived from drilling action and/or sample data; usually described as: very loose, loose, medium dense, very dense. General intent is to portray earthwork characteristics. Stiffness - refers to more-or-less cohesive soils and fine grained silts of r.~silt groups. Derived from drill action and/or sample data. Very soft, soft, stiff, very stiff and hard are commonly used terms. Particle size - The largest particle recovered by the split spoon is 1-318", Shelby tube Y', auger flights (minute-man) 2", Auger flights (B-SO hollow stem) 6"-8", Larger particles are described indirectly by action of the drilling and arc referred to as cobbles, 3" to 8", or boulders.8"+. Therefore when reviewing the gradation sheets, if any, the description on thi~ hole log must be considered for an"indication of larger particles, Unified Soil Classification - This is a two letter code. See Unified C-I~ ~'cT;:~'~her definition. In some cases AASHO aud/or FAA soil classifications may be shown as well as the unified. Atterberg Limits - useful for fine grained and other plastic soils. PI; natural moisture content believed to be less than plastic limit PI+; natural moisture content believed to be between plastic and liquid I~nits L_._~i natural moisture' content believed to be greater than liquid limit · N~P; non-pLastic, useful as a modifying description of some silty mat~siaLa. Dilatencv - is the ability of water to migrate to the surface of a saturated or nearly saturated soil sample when vibrated or johed - used as an aid to determine if a fine grained soil is a slig}ttly or non-plastic silt or a volcanic ash. Rock flour - finely ground soil that is not plastic but otherwise appears similar ~o a clayey silt. Organic Content - usually described as Peat, PT, sometimes includes ~ p~ such as wood, coal, etc. as a modifier to an inorganic soil, Quantity described as; trace, or au estimate of volume, or, in case of all organic, - as Peat. This may include tundra, muskeg and bog material. Muck - a modifier used to describe very soft, semi-organic deposits hsufil]y occuring: below a peat deposit. Amorphus peat -- organic particles nearly or fully disintegrated. Fibrous Peat - organic particles more-or-less intact. Bottom of Testhole - mcludes last satople interval· Frost Line - seasonal frost depth as described by drilling action and/or samples at the time of drilling. Frozen Ground - other than frost line, described by samples, usually includes description of ice content, often will include modified Unified Classification for frozen soils - this is a special case related to permafrost studies. Free Water Level - The free water level noted during drilling. This is not necessarily the static water table at the time of drilling or at other seasons. Static water table determination in other than very permeable soils requires observation wells or piezometer installations, used only in special cases. Blow/6:' - The number of blows of a 140 weight free falling 30" to advance a 2" split spoon 6"; the number of blows for a 12' advance is. by definition, the standard penetration. M% - natural moisture contettt of the soil sample, usually not performed on clean sands or gravels below the water table. Type of Sample - SP, refers to 2" split spoon driven into the soil by 140 pound weight, a disturbed sample, S, thin wall tube, "Shelby" used to obtain undisturbed samples of fine grained soil, G, "grab" disturbed sample from auger flights or wall of trench, ~ cut sample, undisturbed sample from wall of trench. Dry, Strep t~ -- a useful indicator of a soil's clayey fraction, N=None, L=Low, M=Medium, H=High Group - The samples are placed into apparently sintilar groups based on color and texture and are arbitrarily assigned a group letter. Further disturbed tests including Atterberg Limits, grain size, moisture4ensity relationship, etc. Inay be performed on tbe group and are assumed to reflect thc general distrubed characteristics of the soils assigned to the group. This is an intportant phase of the soil analysis and is used to standardize the various qualitative determination, and to reduce the number of quantitative test.~ necessary to describe the soil ma~s. SOIL CLASSIFICATION CHART 30% GRAVEL /" CLAY .,~ ./ CLAYEY OR SILTY SAND CLAYEY CLAYEY CLAYEY SILTY SILTY % SILTY GRAVEL GRAVELLY SAND SANDY GRAVEL SAND GRAVELLY SAND SANDY GRAVEL GRAVEL 0 10 20 30 40 50 60 70 80 90 !00 GRAVEL {+#4 SCREEN) % BY WEIGHT NONFROST SUSCEPTIBLE SOILS ARE INORGANIC SOILS CONTAINING LEiS THAN 3% FINER THAN 0.02 mm. GROUPS OF FROST-SUSCEPTIBLE SOILS: F1 GRAVELLY SOILS CONTAINING BETWEEN 3 A'ND 20% FINER THAN 0.02 mm. F2 SANDY SOILS CONTAINING BETWEEN 3 AND 15% FINER THAN 0.02 mm. F3 a. GRAVELLY SOILS CONTAINING MORE THAN 20% FINER THAN 0.02 mm. AND SANDY SOILS (EXCEPT FINE SILTY, SANDS) CONTAINING MORE THAN 15% FINER THAN 0.02 mm. b. CLAYS WlTI4 PLASTICITY INDEXES OF MORE TI-JAN 12. EXCEPT VARVED CLAYS. F4 ao ALI._ SILTS INCLUDING SANDY SILTS. b. FINE SILTY SANDS CONTAINING MORE TI-tAN 15% FINER THAN 0.02 mm. ¢. LEAN CLAYS WITH PLASTICITY INDEXES OF LESS THAN 12. dj VARVED CLAYS. DEPARTMENT OF HEALTH AND ENVIRONMENTAL PROTECTION PLATTING OR PLANNING AND ZONING CASE REVIEW CASE NUMBER S-5100 PETITION FOR REZONING SPECIAL EXCEPTION VACATION REGUBDIVISION DATE RECEIVED March 5¢ 3.979 COMMENTTO PLANNING BY M&r 20,, OF Rockhill ~ Subdivision 1979 FOR MEETING OF COMMENTS: ENVIRONMENTAL SANITATION: PUBLIC WATER NOT AVAILABLE of Cases PUBLIC NOT AVAILABLE TO SERVICE PETITION AREA. 71-014 (9/76) o z :., S Y R E E T ANCHORA(i~E, ALASKA 9950'1 (907) 26441'11 GEO/N;TE 1¢i. SULLIVAt¢, DE~AR]'IVIE~gT OF NEAL'| H AN[) ENV~F/OHk/IEN'I-AL PRE TECTtOiq April. 20, 1981 DOWL Engineers 4040 B Street Anchorage, Alaska 99503 Attention: Bob Grier Subject: Rockhill Subdivision ihlo department has reviewed additional soils t6 .... data from the gravel extractJ, on a~'ea.~ The data reveals some soil classifications of SM ari~ at greater depths ML soils. Although~ visual classifications rated the soil poor¢-the subsequentperdolation tests were favorable. Therefore, the large lot size coupled with the percolation rates will meet with this department's approval. if tlhere are any further quest, ions, please call this office at. 264'-4720~ Sincerely, Ro!f R. Strickland, Division Manager RRS/1 j w A4unicipality ot Anchorl ge MEMORANDUM DATE: TO: FROM: SUBJECT: August 7,. 1979 Jerry Weaver ~lanning Department Health and Environmental Protection S-5100 - Rockhill Acres Subdivision .PhaseI ~/ This department has reviewed the soil and percolation test for the above subject subdivision as submitted and finds the data meets with conditions with which this department is concerned. The developer must be aware of the Municipal guidelines of slope, which must be less than 25% for construction of any~n-site ' J°hn W~-~' ~ynn ' V L Environmental Specialis~ · I ~. 4040 "B" STREET ANCHORAGE, ALASKA 99503 (907) 278-1551 Dean Tompson/Lawyers Title P. O. Box 3-3772 ECB Anchorage, Alaska 99501 March 15, 1979 W.O. #Dl1139 Subject: Subsurface Investigation for Suitability for On-~i'te Sewage Disposal, Rockhill ~ Gentlemen: At your request we have conducted a series of percolation tests in borings drilled in May, 1978, in Rockhill Acres. Rockhill Acres ].s located off Abbott Road in the lower hillslde area of Anchorage, Alaska as shown on the vicinity map, Figure 1. On February 26, 1979 we submitted to you the test logs of the nineteen test borings drilled during the May 1978 program, along with laboratory test results. After the borings were drill~ a 3/4" slotted PVC pipe was inserted into each hole to keep the hole open in case of caving and to aid in measuring' the free water level. However, percolation tests were not conducted at that time. Recently, we have attempted to locate those borings; however, · heavy, snow cover obscured the boring locations and we were only able to locate six. The PVC pipes were checked, to confirm that no plugging had occurred The pipes were then filled with water and left over night to saturate. On returning the next day the pipes were refilled and the change of water level carefully monitored over the next 60 minutes. Rates reported on the following p~ge represent the slowest percolation rate observed during the 60 minute observation. Dean Thompson March 15, 1979 Page Two It is our opinion that on-site wastewater disposal systems may be constructed on all lots in this subdivision in conformance with Municipality of Anchorage, Department of Public Health and Environmental Protection regulations. Table 2 lists the observed percolation rates and estimated rates for those lots on which percolation tests were not conducted. The estimated percolation rates were determined by comparing soil types and terrain features with areas where percolation tests were conducted. We feel confident that the values are generally conservative. It may be possible to lower the design percolation value on some lots by actually placing a test hole and running a percolation test on that specific lot. If the testing can shorten the required absorption terrain by a length of 10 to 15 feet it may save the cost of the test in reduced construction costs. Ail seepage pit, leech field, absorption trench excavations should be inspected prior to backfilling to assure that actual soil conditions do not vary substantially from those assumed in our analysis. The nineteen test borings, drilled in May, 1978~ were drilled with a solid flight auger rig, is owned by Denali Drilling Co., Inc. The drilling was supervised and the test holes logged by Mr. O.M. Hatch, Alaska Testlab senior Geologist. As samples were recovered, the test holes were logged and the soils visually classified. Samples were then sealed in plastic bags to protect the natural moisture content. In the laboratory, the moisture content and dry strength of each sample was determined. Samples of similar color, texture, particle size distribution were grouped together and given an arbitrary group designation. Grain size analysis was then performed on composite samples of important groups rather than on the individual samples. The general soil types encountered on this project are listed in Table 3 by their group designation. Supplementing this subsurface information, we have used the test pit logs from a preliminary investigation by Lounsbury and Associates. The location of these test pits and our test boring locations are shown on the plot plan attached to this report in an envelope. Soils generally consist of silty sands and gravel. One boring did encounter relatively clean gravel and several borings'encountered sandy silt. No ground water was encountered. Dean Thompson March 15, 1979 Page Three In an area that was used for a gravel barrow pit, significant quantities of unclassified fill has been placed during or prior to regrading operations. This fill'was placed without proper compaction controls and contains organics, garbage, and other unsuitable material in some areas. We strongly recommend that a foundation investigation be conducted on each lot in Block 2 prior to construction of residential structures. We also recommend that additional information be obtained prior to construction of Main Tree Drive and Platinum Circle. The following plates and tables are attached and complete this report: Table A Observed Percolation Rates Table B Site Waste-Water System Design Criteria Table C Description of Soil Groups Table D Summary of Test Pit Logs by Lounsbury and Associates Table E-W Test Boring Logs Sheets 1-6 Grain Size Distribution Curves Sheets 7-9 Explanitory Information It is trusted that this information meets your present requirements. If you have any questions or if we may be of further assistance, please do not hesitate to contact us. Very sincerely, ALASKA TESTLAB james R. Finley, Jr. APPROVED: ~elvin R. Nichols, P.E. Laboratory Supervisor 0 0 0 0 ~°~ ~0000000000 I 0 0 Or~ 0 I [-4 H 0 ~H O O o 0 0 0 0 .Pi 0 0 0 -,4 0 4~ 0 0 0 4J I O 4~ ~ · O~ 0 D (B 0 00~ 0 0 ,-{,-4 t~ ~ 0 ~ 0 mOO (DO TABLE C DESCRIPTION OF SOIL GROUPS GROUP SOIL TYPE UNIFIED CLASSIFICATION FROST SUSCEPTIBILITY CLASSIFICATION ESTImaTED PERCOLATION RATE (MIN/IN) A B C D Sandy Gravel with some silt Sandy Gravel Silty Gravelly Sand (20% Gravel) Silty Gravelly Sand' (30% Gravel) Sandy Silt with trace fine gravel Silty Sand with trace fine gravel GM GW SM SM SM F1 NFS NFS,F2 F2 F4 F2, F4 3 12 10 15 TABLE D SUMMARY OF TEST PIT LOGS By Lounsbury & Associates TEST PIT DEPTH PREDOMINATE SOIL TYPE 3 0.5-1 .5 1 ~5-3.5 3.5-11+ 2-5.5 5.5-11.5+ 2.5-8.5+ 1.5 -4.5 4.5-8.5 1.5-9.5 0.5-4.0 4.0-4.5 4.5-9.5+ Silty Sand Gravelly Sand Sandy Gravel Gravelly Sand Sandy Gravel Sandy Gravel with Silt Layer at 4.5 GraVelly Sand Gravel Sandy Gravc! Silty Sand Sand Gravelly Sand NOTE: Soil descriptions from Lounsbury & Associates logs. Were not logged by Alaska Testlab or DOWL Engineers. Test Hole Table E WO #Dl1139 Logged By: O.M. Hatch Date: May 23, 1978 Depth in Feet From To 0.0' - 6.0' 6.0' - 16.0' Soil Description F-2, brown very Silty Gravelly Sand (SM), occasional cobbles, damp, medium density, rounded particles to 8". F-l, brown slightly Silty .Sandy Gravel (GM), damp, medium density, rounded and subrounded particles to 3". Bottom of Test Hole: Frost Line: Free Water Level: 16.0' None Observed None Observed Sample Depth 1 5.0' 2 10.0' 3 16.0' Type of Dry M% Sample Strenqth Group Unified 5.9 G N A GM 3.5 G N A GM 4.6 G N A GM Remarks: I. 3. 4. 5. 6. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see Sheet 1. Frost and Textural Classification, see Sheet 2. Unified Classification, see Sheet 3. Test Hole #2 Table F WO #Dl1139 Logged By: O.M. HatCh Date: May 23, 1978 Depth in Feet From To 0.0' - 1.0' 1.0' - 6.0' 6.0' - 8.0' 8.0' - 14.0' 14.0' - 16.0' Bottom of Test Hole: Frost Line: Soil Description Brown Peat (Pt), damp, soft. NFS, brown very Sandy Gravel (GW), well graded, damp, medium density, rounded particles to 1" NFS, brown Sand (SW), well graded, damp, medium dens~-~y. NFS to F-2, brown fine Silty Sand, damp to saturated, medium density. F-2, brown Silty Gravelly Sand (SM), saturated, medium density, rounded particles to 1" 16.0' None Observed Free Water Level: 11.0' Type of Dry Sample Depth M% Sample Strength Group Unified 1 5.0' 4.3 G N B GW 2 10.0' 20.9 G N-L C SM 3 16.0' 13.3 G L D SM Remarks: 1. 3. 4. 5. 6. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see Sheet I. Frost and Textural Classification~ see Sheet 2. Unified Classification, see Sheet 3. Test Hole #3 Table G WO #D11139 Logged By- O.M. Hatch Date: May 23, 1978 Depth in Feet From To 0.0' - 1.0' 1.0' - 7.0' 7.0' - 16.0' Soil Description Brown Peat (Pt), damp, soft. F-2, brown Silty Gravelly Sand (SM), few cobbles, damp, medium denslt~ rounded and subrounded particles to 6" F-2, b~own Sandy Silt (SM), damp, stiff, NP, becoming siltier (ML) below 12' Bottom of Test Hole: Frost Line: Free Water Level: Sample Depth M% I 5.0' 9.1 2 10.0' 10.5 3 16.0' 15.8 16.0' None Observed None Observed Type of Dry Sample Strength Group Unified G L D SM G L E ML G NL E ML Remarks: 1. 3. 4. 5. 6. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see Sheet 1. Frost and Textural Classification, see Sheet 2. Unified Classification, see Sheet 3. Test Hole #4 Table H WO #Dl1139 Logged By: O.M. Hatch Date: May 23, 1978 Depth in Feet From To 0.0' - 1.5' 1.5' - 6.0' 6.0' - 16.0' Soil Description Brown Peat (Pt), damp, soft. F-2, brown very Silty Gravelly Sand (SM), damp, medium density, subrounded particles to 3", all sand sizes. F-2, brown Silty Sand (SM), fine grained, damp, medium d-~si%y. Bottom of Test Hole: Frost Line: Free Water Level: 16.0' None Observed None Observed Sample Depth 1 5.0' 2 10.0' 3 16.0' Type of Dry M% Sample Strength Group Unified 9.5 G N-L E 6.4 G N-L F 6.9 G N-L F Remarks: 1. 3. 4. 5. 6. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see Sheet 1. Frost and Textural Classification, see Sheet 2. Unified Classification, see Sheet 3. Test Hole #5 Table I WO #Dl1139 Logged By: O.M. Hatch Date~ May 23, 1978 pepth in Feet From To 0.0' - 1.0' 1.0' - 6.0' 6.0' - 16.0' Soil Description Brown Peat (Pt), damp, soft. NFS, brown Sandy Gravel (GW), occasional cobbles, damp, medium density, rounded particles to 6" F-l, brown Silty Sandy Gravel (GM), occasional cobbles, damp, medium to high density, rounded particles to 6" Bottom of Test Hole: Frost Line: Free Water Level: 16.0' None Observed None Observed Sample Depth 1 5.0' 2 10.0' 3 16.0' Type of Dry M% Sample Strength Group Unified 11.1 G N A GM 4.4 G N A GM' 3.6 G N A GM Remarks: 1. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. 2. Dry Strength, N=None, L=Low, M=Medium, H=High. 3. Group refers to similar material, this study only. 4. General Information, see Sheet 1. 5. Frost and Textural Classification, see Sheet 2. 6. Unified Classification, see Sheet 3. Test Hole #6 Table J WO #Dl1139 Logged By: O.M. Hatch Date: May 23, 1978 Depth in Feet From To 0.0' - 0.5' 0.5' - 1.5' 1.5' - 16.0' Soil Description Brown Peat (Pt), damp, soft. F-l, brown Silty Sand~ Gravel (GM), damp, medium density, rounded particles to 3" NFS, brown Sandy Gravel (GW), damp, medium density, lacks fine sands, rounded particles to 3". Bottom of Test Hole: Frost Line: Free Water Level: 16.0' None Observed None Observed Sample Depth 1 5.0' 2 10.0' 3 16.0' Type of Dry M% ~ample Strength Grou~ Unified 3.6 G N B GW 3.4 G N B GW 3.7 G N B GW Remarks: 1. 3. 4. 5. 6. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see Sheet 1. Frost and Textural Classification, see Sheet 2. Unified Classification, see Sheet 3. Test Hole #7 Table WO #D11139 Logged By: O.M. Hatch Date: May 24, 1978 Depth in Feet From To 0.0' - 2.0' 2.0' - 5.5' 5.5' - 16.0' Soil Description Brown Peat (Pt), damp, soft. F-4, brown Sandy Silt (ML), damp, stiff, NP. F-l, brown Silty Sandy Gravel (GM), damp, medium dens~-~y, rounded pa---~cles to 2". Bottom of Test Hole: Frost Line: Free Water Level: 16.0' Trace None Observed Sample Depth 1 5.0' 2 10.0' 3 16.0' Type of Dry M% Sample Strength Group Unified 23.2 G L-M E ML 5.2 G N F SM 8.2 c L D sM l. 7. Remarks: 1. 3. 4. 5. 6. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see Sheet 1. Frost and Textural Classification, see Sheet 2. Unified Classification, see Sheet 3. Test Hole #8 Table L WO #Dl1139 Logged By: O.M. Hatch Date: May 24, 1978 Depth in Feet From To 0.0' 1.5' 1.5' - 7.0' 7.0' - 10.0' 10.0' - 16.0' Soil Description Brown Peat (Pt), damp, soft. F-4, brown Sandy Silt (ML), damp, stiff, NP, trace gravel. F-2, brown Silty Gravelly Sand (SM), damp, medium density. F-l, brown Silty Sandy Gravel (GM), occasional cobbles, damp, dense, rounded particles to 12". Bottom of Test Hole: Frost Line: Free Water Level: 16.0' Trace None Observed Sample Depth 1 5.0' 2 10.0' 3 16.~' Type of Dry M% Sample Strength Group Unified 18.7 G N-L E ML 11.0 G N D SM ~-~-~ 11.8 G N A GM Remarks: 1. 3. 4. 5. 6. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see Sheet 1. Frost and Textural Classification, see Sheet 2. Unified Classification, see Sheet 3. Test Hole Table WO #Dl1139 Logged By: O.M. Hatch Date: May 24, 1978 Depth in Feet From To 0.0' - 14.0' 14.0' - 16.0' Soil Description F-2, brown fine Silty Sand (SM), damp, medium density, trace gravel to 6' F-4, brown Sandy Silt (SM), damp, stiff, NP. Bottom of Test Hole: Frost Line: Free Water Level: 16.0' ~ample DePth 1 5.0' 2 10.0' 3 16.0' Type of Dry M% Sample Strength Group Unified 11.8 G N C SM 7.9 G N C SM 19.4 G L-N SM Remarks: 1. e 3. 4. 5. 6. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see Sheet 1. Frost and Textural Classification, see Sheet 2. Unified Classification, see Sheet 3. Test Hole #10 Table N WO #Dl1139 Logged By: O.M. Hatch Date: May 24, 1978 Depth in Feet From To 0.0' - 2.0' 2.0' - 5.0' 5.0' - 6.0' 6.0' - 12.0' 12.0' - 16.0' Soil Description Brown Peat (Pt), damp, soft. F-l, brown Silty Sandy Gravel (GM), damp, medium density, rounded and subrounded particles to 3". NFS, brown Sandy Gravel (GW), damp, medium density, sUbrounded particles to 2". F-4, brown Sandy Silt (SM to ML), with fine Sand, damp to wet, medium density. F-l, brown Silty Sandy Gravel (GM), damp, medium density, rounded particles to 3" Bottom of Test Hole: Frost Line: Free Water Level: 16.0' Remarks: None Observed See Remarks wet at 11.0' Sample Depth 1 5.0' 2 10.0' 3 16.0' Type of Dry M% Sample Strength Group Unified 7.1 G N B GW 16.4 G N E ML 9.1 G N A GM Remarks: 1. 3. 4. 5. 6. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see Sheet 1. Frost and Textural Classification, see Sheet 2. Unified Classification, see Sheet 3. Test Hole #11 Table O WO #Dl1139 Logged By: O.M, Hatch Date: May 25, 1978 D~pth in Feet From To 0.0' ~ 0.5' 0~5' ~ 7,0' 7,0' ~ 11.0' 1t,0' ~ t6,0' Soil Description Brown Peat (Pt), damp, soft. F~2, brown Silty Gravelly ~and (SM), damp, medium density, rounded particles to 2", becoming less silty with depth. F=4, brown Sandy Silt (ML), damp, stiff, NP, F~2, brown Silty Gravelly Sand'(SM), 0ccas~°nal cobbles, damp, medi~ll density, rounded particles to !2". ~p~tom of Test Hole: Frost Line: Free Water Level: 16~0' None Observed None Observed Sample Depth 5.0' 10,0' 16.0' Type of Dry M% Sample Strength Group Unified 9.4 G N D SM 17.4 G L E ML 11.8 G N P SM ~emarks: ~ype of sample, G=Grab, SP = Standard Penetration, U ~ Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see' Sheet 1. Frost and Textural Classification, see Sheet 2. Unified Classification, see Sheet 3. Test Hole #12 Table P WO #Dl1139 Logged By: O.M. Hatch Date: May 25, 1978 D~pth in Feet From To 0.0' - 3.0' 3.0' - 16.0' Soil Description F-2, brown Silty Gravelly Sand (SM), damp, medium density, rounded particle's to 3". F-2, brown fine Silty Sand (SM), trace gravel, damp, medium density. Bottom of Test Hole: Frost Line: Free Water Level: 16.0" None Observed None Observed Sampl.e Depth 1 5.0' 2 10.0' 3 16.0' Type of Dry M% Sample Strength Group Unified 9.1 G N F SM 5.2 G N F SM 10.0 G N-L F SM Remarks: 1. t 3. 4. 5. 6. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see Sheet 1. Frost and Textural Classification, see Sheet 2. Unified Classification, see Sheet 3. Test Hole #13 Table Q wo #Dl1139 Logged By: O.M. Hatch Date: May 25, 1978 Depth in Feet From To 0.0' - 16.0' 16.0' - 20.0' Soil Description Brown Peat, silt, wood, sand, gravel, mixed, fill, soft to stiff, very soft to 5', damp. F-2, brown fine Silty'Sand (SM), damp, medium density. Bottom of Test Hole: Frost Line: Free Water Level: 20.0' Sample Depth I 5.0' 2 10.0' 3 16.0' 4 20.0' Type of Dry M% Sample ~trength Group Unified 54.4 G N - - 42.7 G N - - 62.7 G N - - 7.8 G N F SM Remarks: 1. 3. 4. 5. 6. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see Sheet 1. Frost and Textural Classification, see Sheet 2. Unified Classification, see Sheet 3. Test Hole #14 Table R WO #Dl1139 Logged By: O.M. Hatch Date~ May 25, 1978 Depth in Feet From To 0.0' - 8;0' 8.0' - 13.0' 13.0' - 16.0' Soil Description Brown Silt, peat, wood, sand, gravel, mixed, fill, damp, stiff. F-4, brown Gravelly Sandy Silt (ML), damp, stiff, NP, very sandy 8-9' F-2, brown Silty Gravelly Sand (SM), damp, medium to hi-~--~e~ ~ou--~d and subrounded particles to 3". Bottom of Test Hole: Frost Line: Free Water Level: 16.0' None Observed None Observed Sample Depth 1 5.0' 2 10.0' 3 16.0' Type of Dry M% Sample ~trength Group Unified 28.7 G N - - 11.4 G L-N E ML 8.1 G N D SM Remarks: 1. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. 2. Dry Strength, N=None, L=Low, M=Medium, H=High. 3. Group refers to similar material, this study only. 4. General Information, see Sheet 1. 5. Frost and Textural Classification, see Sheet 2. 6. Unified Classification, see Sheet 3. Test Hole #15 Table S WO #D11139 Logged By: O.M. Hatch Date: May 25, 1978 Depth in Feet From To 0.0' - 4.0' 4.0' - 10.0' 10.0' - 16.0' Soil Description F-2, brown Silty Sand (SM), fine and medium grained, wet, low density, fill. F-2, brown Silty Sand (SM), fine and medium grained, medium density, damp. F-4, brown Gravelly Sandy Silt (SM to ML), damp, stiff, NP, rounded and subrounded particles to 3". Bottom of Test Hole: Frost Line: Free Water Level: 16.0' None Observed None Observed Sample Depth 1 5.0' 2 10.0' 3 16.0' Type of Dry M% Sample Strength Group Unified 11 . 5 G L F SM 9.2 G N-L E ML 5.6 G N F SM Remarks: 1. 3. 4. 5. 6. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see Sheet I. Frost and Textural Classification, see Sheet 2. Unified Classification, see Sheet 3. Test Hole #16 Table T. WO #Dl1139 Logged By: O.M. Hatch Date: May 26, 1978 Depth in Feet From To 0.0' - 3.0' 3.0' - 16.0' Soil Description F-4, brown Gravelly Sandy Silt (ML), with wood, damp, stiff, NP. F-l, brown Silty Sandy Gravel (GM to GP-GM), damp, medium density, rounded particles to 2" above 11', particles to 6" below 11' Bottom of Test Hole: Frost Line: Free Water Level: 1-~.0' None Observed None Observed Sample Depth I 5.0' 2 10.0' 3 16.0' Type of Dry M% Sample Strength Group Unified I. 6 G N A GM 3.2 G N A GM I. 7 G N A GM Remarks: 1. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. 2. Dry Strength, N=None, L=Low, M=Medium, H=High. 3. Group refers to similar material, this study only. 4. General Information, see Sheet 1. 5. Frost and Textural Classification, see Sheet 2. 6. Unified Classification, see Sheet 3. Test Hole #17 Table U WO #Dl1139 Logged By: O.M. Hatch Date: May 26, 1978 Depth in Feet From To 0.0' - 13.0' 13.0' - 16.0' Soil Description F-2, very ~ Gravelly Sand (SM), damp, medium density, rounded particles to 2", less silt and gravel at 6.5'-8.0', fine and medium sand sizes. F-2, brown Silty Sand (SM), fine and medium grained, damp, medium density. Bottom of Test Hole: Frost Line: Free Water Level: 16.0' None Observed None Sample Depth 1 5.0' 2 10.0' 3 16.0' Type of Dry M% ~ample Strength Group Unified 5.9 G N F SM 5. I G N D ML 3.5 G N F SM Remarks: 1. 3. 4. 5. 6. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see Sheet 1. Frost and Textural Classification, see Sheet 2. Unified Classification, see Sheet 3. Test Hole #18 Table V W0 #Dl1139 Logged By: O.M. Hatch Date:~ May 26, 1978 Depth in Feet From To 0.0' - 4.0' 4.0' - 8.0' 8.0' - 12.0' 12.0' - 16.0' Soil Description Brown Silty Gravelly Sand (SM), fine grained, · damp, medium density, rounded and subrounded particles to 3". F-2, brown Silty f~ne Sand (SM), trace gravel, damp, medium density. F-2, brown Silty Gravelly Sand (SM),'well graded, damp, medium density, rounded particles, to 2". F-2, brown Silty Gravelly Sand, (SM), fine and medium grained, damp, medium density, rounded particles to 2" Bottom of Test Hole: Frost Line: Free Water Level: 16.0' None Observed None Observed Sample Depth I 5.0' 2 10.0' 3 16.0' Type of Dry M% Sample Strength Group Unified 3.9 G N C SM 4.0 G N F SM 9.3 G N-L D SM Remarks: 1. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. 2. Dry Strength, N=None, L=Low, M=Medium, H=High. 3. Group refers to similar material, this study only. 4. General Information, see Sheet 1. 5. Frost and Textural Classification, see Sheet 2. 6. Unified Classification, see Sheet 3. Test Hole #19 Table W WO #Dl1139 Logged By: O.M. Hatch Date: May 26, 1978 Depth in Feet From To 0.0' - 1.0' 1.0' - 8.0' 8.0' - 13.0' 13.0' - 16.0' Soil Description Brown Peat (Pt), damp, soft. F-2, brown Gravelly Sandy Silt (SM), with fine sand, damp, stiff, NP, rounded particles to 2" F-4, brown Gravelly Sandy Silt (SM), damp, stiff, NP,. rounded particles to 2". F-2, brown Silty ~and (SM), with trace gravel, fine grained, damp, medium density. Bottom of Test Hole: Frost Line: Free Water Level: 16.0' None Observed None Observed Sample Depth 1 5.0' 2 10.0' 3 16.0' Type of Dry M% Sample Strength Group Unified 7.3 G N E SM 7. I G N E SM 9. I G N E SM Remarks: 1. e 3. 4. 5. 6. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see Sheet 1. Frost and Textural Classification, see Sheet 2. Unified Classification, see Sheet 3. ~ o o o ~o'~ 0 0 0 ~o~2 Test Hole Lo9 - Description Guide The soil descriptions shown on the h,gs are the best estimate of the soil's characteristics at the time of field examination and as such do not achieve the precision of a laboratory testing procedure. If the log includes soils samples. those samples receive an independent textural classification in the laboratory to verify the field examination, The logs often include thc following items: lnterval - usually shown to 0.1 foot, within that zone no ~nt ~ge in soil type was observed through drill action, direct observation or sampling. Frost Classification - NFS, FI, F2. F3, F4, see "Soil Classification Chart" Texture of Soil - An engineering classification of the soils by particle size and proportion~ see "Soil Classification Chart", note the · proportions are approximate and modifications to the soil group due to stratification, inclusions and changes in properties are included. Moisture Content .. this is a qualitative measure: d.~/., .o ut little apparent surface moisture, damp, moisture forms portion of color, less than plastic limit, wet, no free water, often soft~ if cohesive soil, saturated, free water may be squeezed out, if a free draining soil; di!ate~t at .~tt!ral moisture conte~r, if a non-plastic silt or fine sand. (The moisture content is further definedby reference to PI, LW, NP, M%or dilatency.) Density -~ refers to more-or-less non-cohesive soils, sucb as sand gravel mixtures with or witbout a fine fraction, derived from drilling action and/or sample data: usually described as: very loose, loose, medium dense, very dense. General intent is to portray earthwork characteristics. Stiffness - refers to more-or-less cohesive soils and fine grained silts of i' e c~!ay-silt groups. Derived from drill action and/or sample data. Ver7 soft, soft, stiff, very stiff and hard are commonly used terms. Particle size - Thc largest particle recovered by the split spoon is 1-3/8", Shelby tube 3", auger flights (minute-man) 2", Auger flights (B-50 hollow stem) 6"-8", Larger particles are described indirectly by action of the drilling and are referred to as cobbles, Y' to $", or boulders.8"+. Therefore when reviewing the gradation sheets, if any, · the description on thi~ hole log must be considered for anqndication of larger particles. Unified Soil Classification - This is a two letter code, See Unified Classification sheet for further definition. In some cases AASHO and/or FAA soil classifications may be shown as well as the unified. Atterberg Limits - useful for fine grained and other plastic soils. Pl; natural moisture content believed to be less than plastic limit PI+; natural moisture content believed to be between plastic and liquid ]~nits L..._~; natural moisturg: content believed to be greater than liquid limit . N_~P; non-plastic, useful as a modifying description of some ~ilty materials. Dilatencv - is the ability of water to migrate to the ~urface of a saturated.or nearly saturated soil sample when vibrgted or jolted -- used as an uid to determine if a fine grained soil is ~ slightly or non.pl~stic silt or a volcanic ash, Rock flour -- finely ground soft that is not plastic but otherwise appears similar i.o a clayey silt. Organic Content - usually described as Peat, PT, sometimes includes discrete particles such as wood, coal, etc. as a modifier to an inorganic soil, Quantity described as; trace, or an estimate of volume, or, in case of all organic, - as Peat. This ~nay include tundra, muskeg and bog material. Muck -- a modifier used to describe very soft, semi-organic deposits usu~.lly occuring: below a peat deposit, Amorphus peat -- organic particles nearly or fully disiutegrated. Fibrous Peat - organic particles more-ordess intact. Bottom of Testhole - includes last sample interval. Frost Line - s~asonal frost depth as described by drilling action and/or samples at the time of drilling. Frozen Ground - other than frost line, described by samples, usually includes description of ice content, often will include modified Unified Classification for frozen soils - this is a special case related to permafrost studies. Free Water Level - The free water level noted during drilling. This is not necessarily the static water table at the time of drilling or at other seasons. Static water table determination in other than very permeable soils requires observation wells or piezometer installations, nscd only in special cases. Blow/6" - The number of blows of a 140 weight free falling 30" to advance a 2" split spoon 6"; the number of blows for a 12" advance is, by definition, the standard penetration. ,,,1% - natural moisture content of the soil sample, usually not l~elformed on clean sands or gravels below the water table. Type of Sample -- S__P, refers to 2" split spoon driven into the soil by 140 pound weight, a disturbed sample, S, tbin wall tube, "Shelby" used to obtain undisturbed samples of fine graine8 soil, G, "grab" disturbed sample from auger fligbts or wall of trench, (2, cot sample, undisturbed sample from wall of trench. Dry..Strength - a useful indicator of a soil's clayey fraction, N=None, L=Low, M=Medium, H=High - The samples are placed into apparently similar groups based or and texture and are arbitrarily assigned a group letter. Further disturbed tests including Atterberg Limits, grain size, moisture~tensity relationstnp, etc. may be performed ou the group and are assumed to reflect the general distrubed characteristics of the soils assigned to the group. This is an inlportant pbase of the soil analysis attd is used to standardize the various qualitative determinations and to reduce the number'of quantitative tests necessary to describe the soil mass, SOIL CLASSIFICATION CHART 30% GRAVEL CLAYEY / \ OR SILTY SAND CLAY CLAYEY SI LTY SI LTY GRAVELLY SAND SANDY CLAYEY GRAVEL SILTY GRAVEL SAND GRAVELLY SAND GRAVEL GRAVEL \ \ 0 10 20 30 40 50 60 70 80 90 100 GRAVEL (+#4 SCREEN) % BY WEIGHT NONFROST SUSCEPTIBLE SOILS ARE INORGANIC SOILS CONTAINING LEiS THAN 3% FINER THAN 0.02 mm. GROUPS OF FROST-SUSCEPTIBLE SOILS: F! GRAVELLY SOILS CONTAINING BETWEEN 3 AND 20% FINER THAN 0.02 mm. F2 SANDY SOILS CONTAINING BETWEEN 3 AND 15% FINER THAN 0.02 mm. F3 a. GRAVELLY SOILS CONTAINING MORE THAN 20% FINER THAN 0.02 mm, AND SANDY SOILS (EXCEPT FINE SILTY, SANDS) CONTAINING MORE THAN 15% FINER THAN 0.02 mm. b. CLAYS WITH PLASTICITY INDEXES OF MORE THAN 12. EXCEPT VARVED CLAYS. F4 a. ALL SILTS INCLUDING SANDY SILTS. b. FINE SILTY SANDS CONTAINING MORE TI"lAN 15% FINER THAN 0.02 mm. ¢, LEAN CLAYS WITH PLASTICITY INDEXES OF LESS TI-lAN ]2. d. VARVED CLAYS. ~ean Thompson/Lawyers Title ~/o DOWL Engineers 4040 B Street ~Anchorage, Alaska 99503 4040 "B" STREET ANCHORAGE, ALASKA 99503 (907) 278-1551 February 26, 1979 ~ttn: Mr. Bob Grier Subsurface Investigation Rockhillm~E~i~ Gentlemen: Attached are the logs of nineteen (19) test holes drilled in ~.ockhill Acres during May 1978 under the supervision of Alaska Testlabs. It may prove helpful in interpreting the data on the test hole logs to review the Standard Explanatory Information contained on sheets seven (7) through nine (9). Laboratory analysis was perfcrmed on ali. major soil typed encountered. Gradations for those soils are enclosed on sheets one (1) through six (6). If 'there are any questions, please feel free to contact us. Very sincerely, ALASKA TESTLAB Melvin R. Nichols, PE Laboratory Manager ~IRN/msb Enclosures Test Hole #1 Table A WO #Dl1139 Logged By: O.M. Hatch Date: May 23, 1978 Depth in Feet From To 0.0' - 6.0' 6.0' - 16.0' Soil Description . F-2, brown ~ery Silty Gravelly Sand (SM), occasional cobbles, damp, medium density, rounded particles to 8". F-l, brown slightly Silty Sandy Gravel (GM), damp, medium density, rounded and subrounded particles to 3". Bottom of Test Hole: Frost Line: Free Water Level: 16.0' None Observed None Observed Sample Depth 1 5.0' 2 10.0' 3 16.0' Type of Dry M% Sample Strenqth Group Unified 5.9 G N A GM 3.5 G N A GM 4.6 G N A GM Remarks: 1. 3. 4. 5. 6. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see Sheet 1. Frost and Textural Classification, see Sheet 2. Unified Classification, see Sheet 3. Test Hole #2 Table A WO #Dl1139 Logged By: O.M. Hatch Date: May 23, 1978 Depth in Feet From To 0.0' - 1.0' 1.0' - 6.0' 6.0' - 8.0' 8.0' - 14.0' 14.0' - 16.0' Soil Description Brown Peat (Pt), damp, soft. NFS, brown very Sandy Gravel (GW), well graded, damp, medium dens-~y, rounded particles to 1" NFS, brown Sand (SW), well graded, damp, medium'densl~-~. NFS to F-2, brown fine Silty Sand, damp to saturated, medium density. F-2, brown ~ Gravelly Sand (SM), saturated, medium density, rounded par--~les to 1". Bottom of Test Hole: Frost Line: Free Water Level: 16.0' None Observed 11.0' Sample Depth 1 5.0' 2 10.0' 3 16.0' Type of Dry M% Sample Strength Group Unified 4.3 G N B GW 20.9 G N-L C SM 13.3 G L D SM Remarks: 1. e 3. 4. 5. 6. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see Sheet 1. Frost and Textural Classification, see Sheet 2. Unified Classification, see Sheet 3. Test Hole #3 Table A WO #Dl1139 Logged By- O.M. Hatch Date: May 23, 1978 Depth in Feet From To 0.0' - 1.0' 1.0' - 7.0' 7.0' - 16.0' Soil Description Brown Peat (Pt), damp, soft. F-2, brown Sil__~ Gravelly Sand (SM), few cobbles, damp, medium denslty~--~ rounded and subrounded particles to 6" F-2, brown Sandy Silt (SM), damp, stiff, NP, becoming siltier ~-~-~ below 12' Bottom of Test Hole: Frost Line: Free Water Level: 16.0' None Observed None Observed Sample Depth I 5.0' 2 10.0' 3 16.0' Type of Dry M% Sample Strength Group Unified 9.1 G L D SM 10.5 G L E ML 15.8 G NL E ML Remarks: 1. e 3. 4. 5. 6. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see Sheet 1. Frost and Textural Classification, see Sheet 2. Unified Classification, see Sheet 3. Test Hole #4 Table A WO #Dl1139 Logged By: O.M. Hatch Date: May 23, 1978 Depth in Feet From To 0.0' - 1.5' 1.5' - 6.0' 6.0' - 16.0' Soil Description Brown Peat (Pt), damp, soft. F-2, brown very Silty Gravelly Sand (SM), damp, medium denslty--~--~ subrounde~ ~rticles to 3" all sand sizes F-2, brown Silty Sand (SM), fine grained, -damp, medium~si-~y. Bottom of Test Hole: Frost Line: Free Water Level: 16.0' None Observed None Observed Sample Depth 1 5.0' 2 10.0' 3 16.0' Type of Dry M% Sample Strength Group Unified 9.5 G N-L E 6.4 G N-L F 6.9 G N-L F Remarks: 1. 3. 4. 5. 6. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see Sheet 1. Frost and Textural Classification, see Sheet 2. Unified Classification, see Sheet 3. Test Hole #5 Table A WO #Dl1139 Logged By: O.M. Hatch Date~ May 23, 1978 Depth in Feet From To 0.0' - 1.0' 1.0' - 6.0' 6.0' - 16.0' Soil Description Brown Peat (Pt), damp, soft. NFS, brown Sandy Gravel (GW), occasional cobbles, damp, medium density, rounded particles to 6". F-l, brown Silty Sandy Gravel (GM), occasional cobbles, damp, medi~t~ density, rounded particles to 6". Bottom of Test Hole: Frost Line: Free Water Level: 16.0' None Observed None Observed Sample Depth 1 5.0' 2 10.0' 3 16.0' Type of Dry M% Sample Strength Group Unified 11.1 G N A GM 4.4 G N A GM 3.6 G N A GM Remarks: 1. 3. 4. 5. 6. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see Sheet 1. Frost and Textural Classification, see Sheet 2. Unified Classification, see Sheet 3. Test Hole #6 Table A WO #D11139 Logged By: O.M. Hatch Date: May 23, 1978 Depth in Feet From To 0.0' - 0.5' 0.5' - 1.5' 1.5' - 16.0' Soil DescriPtion Brown Peat (Pt), damp, soft. 'F-l, brown Silty Sandy Gravel (GM), damp, medium density, rounded particles to 3". NFS, brown Sandy Gravel (GW), damp, medium density, lacks fine sands, rounded particles to 3". Bottom of Test Hole: Frost Line: Free Water Level: I'6.0' None Observed None Observed Sample Depth I 5.0' 2 10.0' 3 16.0' Type of Dry M% Sample Strength Grou~ Unified 3.6 G N B GW 3.4 G N B GW 3.7 G N B GW Remarks: 1. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. 2. Dry Strength, N=None, L=Low, M=Medium, H=High. 3. Group refers to similar material, this study only. 4. General Information, see Sheet 1. 5. Frost and Textural Classification, see Sheet 2. 6. Unified Classification, see Sheet 3. Test Hole #7 Table A WO #Dl1139 Logged By: O.M. Hatch Date: May 24, 1978 Depth in Feet From To 0.0' - 2.0' 2.0' - 5.5' 5.5' - 16.0' Bottom of Test Hole: Frost Line: Free Water Level: Soil Description Brown Peat (Pt), damp, soft. F-4, brown Sandy Silt (ML), damp, stiff, NP. F~I, brown ~ Sandy Gravel (GM), damp, medium density, rou--~d pa--~cles to 2". 16.0' Trace None Observed Sample Depth 1 5.0' 2 10.0' 3 16.0' Type of Dry M% Sample Strength Group Unified 23.2 G L-M E ML 5.2 G N F SM 8.2 G L D SM Remarks: 1. e 3. 4. 5. 6. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see Sheet 1. Frost and Textural Classification, see Sheet 2. Unified Classification, see Sheet 3. Test Hole #8 Table A WO #Dl1139 Logged By: O.M. Hatch Date: May 24, 1978 Depth in Feet From To 0.0' - 1.5' 1.5' - 7.0' 7.0' - 10.0' 10.0' - 16.0' Soil Description Brown Peat (Pt), damp, soft. F-4, brown Sandy Silt (ML), damp, stiff, NP, trace gravel. F-2, brown Silty Gravelly Sand (SM), damp, medium density. F-l, brown Silty Sandy Gravel (GM), occasional cobbles, damp, dense, rounded particles to 12". Bottom of Test Hole: Frost Line: Free Water Level: 16.0' Trace None Observed Sample Depth 1 5.0' 2 10.0' 3 16.9' Type of Dry M% Sample Strength Group Unified 18.7 G N-L E ML 11.0 G N D SM 11.8 G N A GM Remarks: 1. 3. 4. 5. 6. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see Sheet 1. Frost and Textural Classification, see Sheet 2. Unified Classification, see Sheet 3. Test Hole #9 Table A WO #Dl1139 Logged By: O.M. Hatch Date: May 24, 1978 Depth in Feet From To 0.0' - 14.0' 14.0' - 16.0' Soil Description F-2, brown fine Silty Sand (SM), damp, medium density, trace gravel to 6' F-4, brown Sandy Silt (SM), damp, stiff, NP. Bottom of Test Hole: Frost Line: Free Water Level: 16.0' Sample Depth 1 5.0' 2 10.0' 3 16.0' Type of Dry M% Sample Strength Group Unified 11.8 G N C SM 7.9 G N C SM 19.4 G L-N SM Remarks: 1. e 3. 4. 5. 6. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see Sheet 1. Frost and Textural Classification, see Sheet 2. Unified Classification, see Sheet 3. Test Hole #10 Table A WO #Dl1139 Logged By: O.M. Hatch Date: May 24, 1978 Depth in Feet From To 0.0' - 2.0' 2.0' - 5.0' 5.0' - 6.0' 6.0' - 12.~0' 12.0' - 16.0' Soil Description Brown Peat (Pt), damp, soft. F-l, brown ~ Sandy Gravel (GM), damp, medium density, rounded ~-~ ~ubrounded particles to 3" NFS, brown Sandy Gravel (GW), damp, medium density, subrounded particles to 2". F-4, brown Sandy Silt (SM to ML), with fine Sand, damp to wet, medium density. F-l, brown Silty Sandy Gravel (GM), damp, medium dens~-~y, rounded particles to 3" Bottom of Test Hole: Frost Line: Free Water Level: 16.0' Remarks: None Observed See Remarks wet at 11.0' Sample Depth 1 5.0' 2 10.0' 3 16.0' Type of Dry M% Sample Strength Group Unified 7.1 G N B GW 16.4 G N E ML 9.1 G N A GM Remarks: 1. 3. 4. 5. 6. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see Sheet ~. Frost and Textural Classification, see Sheet 2. Unified Classification, see Sheet 3. Test Hole 911 Table A WO #D11139 Logged By: O.M. Hatch Date: May 25, 1978 Depth in Feet From To 0.0' - 0.5' 0.5' - 7.0' 7.0" - 11.0' 11.0' - 16.0' Soil Description Brown .Peat (Pt), damp, soft. F-2, brown Silty Gravelly Sand (SM), damp, medium density, rounded par-~les to 2", becoming less silty with depth. F-4, brown Sandy Silt (ML), damp, stiff, NP. F-2, brown Silty Gravelly Sand' (SM), occasional cobbles, damp, medium density, rounded particles to 12" Bottom of Test Hole: Frost Line: Free Water Level: 16.0' None Observed None Observed .Sample Depth I 5.0' 2 10.0' 3 16.0' Type of Dry M% Sample Strength ~roup Unified 9.4 G N D SM 17.4 G L E ML 11.8 G N F SM Remarks: 1. 3. 4. 5. 6. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see Sheet 1. Frost and Textural Classification, see Sheet 2. Unified Classification, see Sheet 3. Test Hole #12 Table A WO #Dl1139 Logged By~ O.M. Hatch Date: May 25, 1978 Depth in Feet From To 0.0' - 3.0' 3.0' - 16.0' Soil Description F-2, brown Silty Gravelly Sand (SM), damp, medium denslty~--~-rounded partl-~les to 3". F-2, brown fine Silty Sand (SM), trace gravel, damp, medium density. Bottom of Test Hole: Frost Line: Free Water Level: 16.0' None Observed None Observed Sample Depth 1 5.0' 2 10.0' 3 16.0' Type of Dry M% Sample Strength Group Unified 9.1 G N F SM 5.2 G N F SM 10.0 G N-L F SM Remarks: 1. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. 2. Dry Strength, N=None, L=Low, M=Medium, H=High. 3. Group refers to similar material, this study only. 4. General Information, see Sheet 1. 5. Frost and Textural Classification, see Sheet 2. 6. Unified Classification, see Sheet 3. Test Hole #13 'Table A WO #Dl1139 Logged By: O.M. Hatch Date: May 25, 1978 Depth in Feet From To 0.0' - 16.0' 16.0' - 20.0' Soil Description Brown Peat, silt, wood, sand, gravel, mixed, fill, soft to stiff, very soft to 5', damp. F-2, brown fine Silty Sand (SM), damp, medium density. ~ottom of Test Hole: Frost Line: Free Water Level: 20.0' Sample Depth t 5.0' 2 10.0' 3 16.0' 4 20.0' ~Type of Dry M% Sample Strength Group Unified 54.4 G N - - 42.7 G N - - 62.7 G N - - 7.8 G N F SM Remarks: 1. e 3. 4. 5. 6. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see Sheet 1. Frost and Textural Classification, see Sheet 2. Unified Classification, see Sheet 3. Test Hole #14 Table A WO #Dl1139 Logged By: O.M. Hatch Date: May 25, 1978 Depth in Feet From To 0.0' - 8.0' 8.0' - 13.0' 13.0' - 16.0' Soil Description Brown Silt, peat, wood, sand, gravel, mixed, fill, damp, stiff. F-4, brown Gravelly ~andy Silt (ML), damp, stiff, NP, very sandy 8-9' F-2, b~own Silty Gravelly Sand (SM), damp, medium to h~gh density, rounded and subrounded particles to 3". Bottom of Test Hole: Frost Line: Free Water Level: 16.0' None Observed None Observed Sample Depth 1 5.0' 2 10.0' 3 16.0' Type of Dry M% Sample Strength Group Unified 28.7 G N - - 11.4 G L-N E ML 8.1 G N D SM Remarks: 1. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. 2. Dry Strength, N=None, L=Low, M=Medium, H=High. 3. Group refers to similar material, this study only. 4. General Information, see Sheet 1. 5. Frost and Textural Classification, see Sheet 2. 6. Unified Classification, see Sheet 3. Test Hole #15 Table A WO #Dl1139 Logged By: O.M. Hatch Date: May 25, 1978 Depth in Feet From To 0.0' - 4.0' 4.0' - 10.0' 10.0' - 16.0' Soil Description F-2, brown Silty Sand (SM), fine and medium grained, wet, low density, fill. F-2, brown Silty Sand'(SM), fine and medium grained, medium density, damp. F-4, brown Gravelly Sandy Silt (SM to ML), damp, stiff, NP, rounded and subrounded particles to 3" Bottom of Test Hole: Frost Line: Free Water Level: 16.0' None Observed None Observed Sample Depth 1 5.0' 2 10.0' 3 16.0' Type of Dry M% Sample Strength Group Unified 11.5 G L F SM 9.2 G N-L E ML 5.6 G N F SM Remarks: 1. e 3. 4. 5. 6. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see Sheet '1. Frost and Textural Classification, see Sheet 2. Unified Classification, see Sheet 3. Test Hole #16 Table A WO #Dl1139 Logged By: O.M. Hatch Date: May 26, 1978 Depth in Feet From To 0.0' - 3.0' 3.0' - 16.0' Soil Description F-4, brown Gravelly Sandy Silt (ML), with wood, damp, stiff, NP. F-l, brown Silty Sandy Gravel (GM to GP-GM), damp, medium density, rounded particles to 2" above 11', particles to 6" below 11' Bottom of Test Hole: Frost Line: Free Water Level: 16.0' None Observed None Observed Sample Depth I 5.0' 2 10.0' 3 16.0' Type of Dry M% Sample Strength Group Unified 1.6 G N A GM 3.2 G N A GM 1.7 G N A GM Remarks: 1. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. 2. Dry Strength, N=None, L=Low, M=Medium, H=High. 3. Group refers to similar material, this study only. 4. General Information, see Sheet 1. 5. Frost and Textural Classification, see Sheet 2. 6. Unified Classification, see Sheet 3. Test Hole #17 Table A WO #Dl1139 Logged By: O.M. Hatch Date: May 26, 1978 Depth in Feet From To 0.0' - 13.0' 13.0' - 16.0' Soil Description F-2, very Silty Gravelly Sand (SM), damp, medium density, rounded pa--~cles to 2", less silt and gravel at 6.5'-8.0', fine and medium sand sizes. F-2, brown Silty Sand (SM), fine and medium grained, damp, medium density. Bottom of Test Hole: Frost Line: Free Water Level: 16.0' None Observed None Sample Depth 1 5.0' 2 10.0' 3 16.0' Type of Dry M% Sample Strength Group Unified 5.9 G N F SM 5.1 G N D ML 3.5 G N F SM Remarks: 1. e 3. 4. 5. 6. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see Sheet 1. Frost and Textural Classification, see Sheet 2. Unified Classification, see Sheet 3. Test Hole #18 Table A WO #Dl1139 Logged By: O.M. Hatch Date: May 26, 1978 Dgpth in Feet From To 0.0' - 4.0' 4.0' - 8.0' 8.0' - 12.0' 12.0' - 16.0' Soil Description Brown Silty Gravelly Sand (SM), fine grained, damp, medium density, rounded and subrounded particles to 3" F-2, brown Silty fine Sand (SM), trace gravel, damp, medium density. F-2, brown Silty Gravelly Sand (SM), well graded, damp, medium densi~7 rounded particles, to 2". F-2, brown Silty Gravelly Sand, (SM), fine .and medium grained, damp, medium density, rounded particles to 2". Bottom of Test Hole: Frost Line: Free Water Level: 16.0' None Observed None Observed Sample Depth I 5.0' 2 10.0' 3 16.0' Type of Dry M% Sample Strength Group Unified 3.9 G N C SM 4.0 G N F SM 9.3 G N-L D SM Remarks: 1. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. 2. Dry Strength, N=None, L=Low, M=Medium, H=High. 3. Group refers to similar material, this study only. 4. General Information, see Sheet 1. 5. Frost and Textural Classification, see Sheet 2. 6. Unified Classification, see Sheet 3. Test Hole #19 Table A WO #Dl1139 Logged By~ O.M. Hatch Date: May 26, 1978 Depth in Feet From To 0.0' 1.0' 1.0' - 8.0' 8.0' - 13.0' 13.0' - 16.0' Soil Description Brown Peat (Pt), damp, soft. Sandy Silt ( with F-2, brown Gravelly __ SM), fine sand, damp, stiff, NP, rounded particles to 2". F-4, brown Gravelly Sandy Silt (SM), damp, stiff, NP, rounded particles to 2" F-2, brown Silty Sand (SM), with trace gravel, fine grained, damp, medium density. Bottom of Test Hole: Frost Line: Free Water Level: 16.0' None Observed None Observed Sample Depth 1 5.0' 2 10.0' 3 16.0' Type of Dry M% Sample Strength Group Unified 7.3 G N E SM 7.1 G N E SM 9.1 G N E SM Remarks: 1. e 3. 4. 5. 6. Type of Sample, G=Grab, SP = Standard Penetration, U = Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see Sheet 1. Frost and Textural Classification, see Sheet 2. Unified Classification, see Sheet 3. 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'~4. '[4' 'S4'N - uoilt~aDiSSelD leo.t:! '8u!idu:es .m uo!le^.xasqo laa~.p 'ua!las tl!:P q~no:ql paaiasqo se~ adXs liOS u! a~ueqa su~nij!u~.s au auoz l~ql uiql!,~ 'looJ I'0 al u~aoqs All~nsn - I~^lalUl qadacl :stuasi ~uVaoltoJ sql apnpui UaDO siloI ep!no uo!ld.uaseC} -- 50'1 cioH ~.seJ. SOIL CLASSIFICATION CHART 30% GRAVEL CLAY 0 I0 CLAYEY ! OR SILTY / SAND CLAYEY CLAYEY CLAYEY SILTY ~ ,/ SAND SANDY GRAVEL GRAVELLY SAND ~I, SANDY GRAVE[ GRAVEL / 20 30 40 50 60 70 80 90 ! 00 GRAVEL (+:4 SCREEN) % BY WEIGHT NONFROST SUSCEPTIBLE SOILS ARE INORGANIC SOILS CONTAINING LESS THAN 3% FINER THAN 9.02 mm. GROUPS OF FROST-SUSCEPTIBLE SOILS: F1 GRAVELLY SOILS CONTAINING BETWEEN 3 AND 20% FINER THAN 0.02 mm. F2 SANDY SOILS CONTAINING BETWEEN 3 AND 15% FINER THAN 0.02 mm. F3 a. GRAVELLY SOILS CONTAINING MORE THAN 20% FINER THAN 0.02 mm. AND SANDY SOILS (EXCEPT FINE SILTY. SANDS) CONTAINING MORE THAN 15% FINER THAN 0.02 mm. b. CLAYS WITH PLASTICITY INDEXES OF MORE THAN 12. EXCEPT VARVED CLAYS, F4 a. ALL SILTS INCLUDING SANDY SILTS. b. FINE SILTY SANDS CONTAINING MORE THAN 15% FINER THAN 0.02 mm. c. LEAN CLAYS WITH PLASTICITY INDEXES OF LESS THAN 12. d. VARVED CLAYS,