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HomeMy WebLinkAboutYOUNG S-4880Youngs S4880 :- \f/ I ,r" Head Office / 74' treet Anchorage, Alaska 99501 / 907-279-Q543 ble TNHANCAK / Telex 090-25332 .� ��/� ,0 ENGINEERS /PLANNERS /SURVEYORS q I yi�y 05IY 8149.0 1(r` s �G November 10, 1978 Mr. John W. Lynn Department of Health & Environmental Protection 825 L Street Anchorage, AK 99501 Subject: Subsurface Investigation for Youngs Subdivision Dear Mr. Lynn: Submitted herewith for your review and approval is the soils report and addendum for the above mentioned project. The report was prepared by Alaska TestLab who drilled a total of 7 holes to a depth of 16' on the site. Percolation tests were run on holes No. 1, 5 and 7 which are shown in Table B along with interpolated rates for each lot and block. Subsurface water was encountered in test holes 4, 4a, 2 and 6. It is the opinion of Alaska TestLab and ourselves that this is shallow subsurface water and not true ground or perched water. This is believed to have been due to the heavy rains that occurred this past construction season which was retained due to ground cover and poor drainage in several areas of the site. As shown in the test logs, this saturated condition within these areas generally extends to a relatively shallow depth of less than 10 feet. As stated in the report, based on the data collected, on-site sewage disposal systems meeting municipal standards can be constructed on all proposed lots within the subdivision. If you have any questions or if we can provide additional information at this time for approval of the plat, please call. Very truly yours, David A Grenier, P.E. 1 m cc - Tod Youngs 4040 "B" STREET ANCHORAGE, ALASKA 99503 (907) 278-1551 W.O. #A18567 Mr.. Todd Youngs P.O. Box 4-2482 Anchorage, AK 99509 Subject: Addendum to Subsurface Investigation for Youngs Subdivision Dear Mr. Youngs: As discussed in our original report to you dated August 8, 1978, we had not time to complete the laboratory analysis of the soil samples taken during the subsurface investigation for the above referenced project. That work has now been completed. This addendum is intended to give a detailed description of the major soil groups encountered during the exploration, present the final adjusted test hole logs, and present all of the results of the laboratory testing, Six major- soil groups were identified and are described below: Group A is a brown Sandy Gravel, it is non -frost suscep- tible, being rated NFS. Its unified classification is GW and its gradation is shown on Sheet 1. This material will be excellent for base material for road construction. Its permeability is high and it should prove excellent for disposal of effluent from on-site sewage disposal systems. Group B is a grey Silty Gravelly Sand that is highly frost susceptible, being rated F-3. Its unified class- ification is SM and its gradation is shown on Sheet 2. This soil is moderately permeable. Group C is a grey to brown Silty Sandy Gravel that is moderately frost susceptible, being rated F-1. Its unified classification is SM. This is a borderline material between a gravel and a sand. The gradation for this group shown on Sheet 3 shows the soil as being a sand, however, this is probably incorrect in a strict sense in the native state, because the drilling does not pick up as much of the coarse fraction as usually exists. Therefore, on the test hole logs this material has been referred to as a gravel rather than a sand. Mr. Todd Youngs August 14, 1978 Page Two Group D is a brown Sandy Silt that is highly frost sus- ceptible being rated F-4. Its unified class- ification is ML. Group E is a brown Silty Sand that is moderately frost susceptible, being rated F-2. Its unified class- ification is SM. Group F is a grey Sandy Silt that is highly frost sus- ceptible, being rated F-4. Its unified class- ification is SM. Its gradation is shown on Sheet 4. In reference to the Table E included in the initial report dated August 8, 1978, it listed an estimated, or actual, percolation rating for each lot of the subdivision. We would like to add to that a note of caution. These values obviously come from extrapolation of data. Indeed even where a single test hole is placed on one lot, that test hole represents a very small portion of the actual surface area of the lot. Therefore, the values listed in that table should only.be used as an indicator and should be verified by visual classification of the soils at the time the exca- vation of the absorption trench is completed. If the soils appear to vary substantially from the descriptions given in the test hole logs, either much more permeable or much less permeable, the writer should then be contacted so that an adjusted rating of the soil be accomplished. If there are any further questions, please do not hesitate to contact us. MRN:rb Enclosures Very sincerely, ALASKA TESTLAB \)(\eSifiAAAZ Ocivotc Melvin R. Nichols, P.E. Laboratory Manager MUNICIPALITY OF ANCHORAGE DEPARTMENT OF HEALTH & ENVIRONMENTAL, PROTECTION NOV .i 31978 RECEIVED s • j 1 ��� • Test Hole #1 Table A WO #A18567 Logged By: O.M. Hatch Date: 7-29-78 Depth in Feet From To Soil Description 0.0' - 0.5' 0.5' - 3.0' 3.0' - 16.0' Bottom of Test Hole: 'Frost Line: Free Water Level: Brown Peat, Pt, damp, soft. F-2, brown Siltx Sand, SM, damp, medium density. NFS, brown Sandy Gravel, GW, damp, medium den- sity, Group A. 16.0' None Observed None Observed Type of Dry Sample Depth M% Sample Strength Group Unified 1 5.0' - G A GW 2 10.0' - G - A 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 #{2 Table A WO #IA18567 Logged By: O.M. Hatch Date: 7-29-78 Depth in Feet From To Soil Description 0.0' - 1.0' Brown Peat, Pt, damp, soft. 1:0' -- 7.0' F-3, brown Silty Sandy Gravel, SM, damp, medium density, particles to 3", Group B. 7.0' - 10.0' F-4, brown Sandy Silt, ML, damp, stiff, NP, particles to 2", Group D. 10.0' -- 16.0' F-3, brown Silty Sandy Gravel, SM, damp, high density, particles to 12", Group B. Bottom of Test Hole: Frost Line: Free Water Level: 16.0' None Observed 3.0' two days after drilling Type of Dry Sample Depth M% Sample Strength Group Unified 1 5.0' - G B SM 2 10.0' - G D ML 3 16.0' - G - B 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 #4 Table A Depth in Feet From To 0.0' - 0.5' 0.5' - 12.0' 12.0 - 16.0' Bottom of Test Hole: Frost Line: Free Water Level: Sample Depth 1 5.0' 2 10.0' 3 16.0' WO #A18567 Logged By: T.L. Barber Date: 8-5-78 Soil Description Brown Peat, Pt, wet to saturated, soft. NES, brown Sandy Gravel, GW, damp to saturated, high density, Group A. F-3, grey Silty Gravelly Sand, SM, saturated, medium to high density, particles to 1", Group B. 16.0' None Observed 7.5' Type of Dry. M% Sample Strength Group, Unified 4.2 G 8.7 G 12.3 G N A GW N A GW L B SM Remarks: 1.. Type of Sample, G=Grab, SP = U = Undisturbed. 2. Dry Strength, N=None, L=Low, M=Medium, 3. Group refers to similar material, this 4. General Information, see Sheet 1. 5. Frost and Textural Classification, see 6. Unified Classification, see Sheet 3. Standard Penetration, H=High. study only. Sheet 2. Test Hole #4A Table A WO 11A18567 Logged By: T.L. Barber Date: 8-5-78 Depth in Feet From To Soil Description 0.0' - 3.0' Brown Peat, Pt, saturated, soft. 3.0' - 16.0' Bottom of Test Hole: Frost Line: Free Water Level: F-1, grey to brown Silty Sandy Gravel, GM, damp to saturated, damp at 12.0', Group C. 16.0' None Observed 6.5'-12.0' Type of Dry Sample Depth M% Sample Strength Group Unified 1 5.0' 7.7 G N -L C GM 2 10.0' 10.2 G L C GM 3 16.0' 11.6 G L C 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 $5 Table A WO #218567 Logged By-: T.L. Barber Date: 8-7-78 Depth in Feet From To Soil Description 0.0' - 0.5' 0.5' - 6.5' 6.5' - 11.5' 11.5' - 16.0' Bottom of Test Hole: Frost Line: Free Water Level: Brown Peat, Pt, damp, soft. F-1, brown Silty Sandy Gravel, GM, damp, high density, Group C. F-4, brown Sandy Silt, ML, random gravel, damp, stiff, NP, Group D. F-2, brown Silty Sand, SM, damp, medium to high density, particles to 3/4", tight, Group E. 16.0' None Observed None Observed Type of Dry Sample Depth M% Sample Strength Group Unified 1 2.5' 3.8 G N C GM 2 10.0' 11.7 G L L. D ML 3 16.0' 8.1 G L 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. Test Hole #6 Table A WO #A18567 Logged By: T.L Barber Date: 8-7-78 Depth in Feet From To Soil Description 0.0' - 10.0' F-1, brown Silty Sandy Gravel, GM, damp to saturated, medium density, Group C. 10.0' - 15.0' Bottom of Test Hole: Frost Line: Free Water Level: F-3, brown Silty Gravelly Sand, SM, damp to wet, Group B. 15.0' None Observed Saturated 4.0' to 8.0' Type of Dry Sample Depth M% Sample Strength Group Unified 1 2.5' 9.0 G L C GM 2 5.0' 9.3 G L C GM 3 10.0' 10.2 G L -M B SM 4 15.0' 10.2 G L B 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 #7 Table A WO #A18567 Logged By: T.L. Barber Date: 8-7-78 Depth in Feet From To Soil Description 0.0' - 0.5' 0.•5' - 7.0' 7.0' - 20.0' Bottom of Test Hole: Frost Line: Free Water Level: Brown Peat, Pt, wet to saturated, soft. F-3, brown Silty Gravelly Sand, SM, medium density, Group B. F-4, grey Gravelly Sandy Silt, SM, damp to wet, stiff, NP, Group F. 20.0' None Observed None Observed Type of Dry Sample Depth M% Sample Strength Group Unified 1 2.5' 7.4 G L B SM 2 5.0' 8.9 G N C GM 3 10.0' 10.1 G L -M F SM 4 15.0' 9.6 G N -L F SM 5 20.0' 12.0 G L -M 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. N 'es co a' > a Ucyn' o N . '0 W N 0 CC ,46 o m F.waq e3 m1`om ao0aj'ti�k1c”N—{ N N M 03 M d O O N O 0 O O O •N 1HOIIM A9 113CW/03 1N30 Q R 4 Y R Yid S o R g' SIEVE ANALYSIS _ HYDROMETER ANALYSIS SIZE OF OPENING IN INCHES NUMBER OF MESH PER INCH U.S. STANDARD GRAIN SIZE IN U. M. ' N <Sd o o$o ff—gggggnN_; 00" corecqI m N N co M V 0 N 0 O co 0 0 N r J a a W W N i u 0 0 0 1 9 6 0 0 0 0 0 0 4� Lei L/11 .412 C r 9 4 2 1N013M AO U3CUy03 1N33 Yid n 1L' uIH'IIIOIIJNI1I1II ~rNIA ,r .0 i; 1 0. __, 1 0. I. i _, • 1- t,-1 _T..Y_ _ .l-1- . gds ptr IuIr 0 1 f i- IIffiffII1 o 1 ,--E II'Lt� 4---I--T__..I6,, -- ice... r 1 II _' --1 Y _4 1 1 r _ I 1 a1 t-" 1 111 u u 1 HMI 1 11 spn�f Pe;.o 1 1 y ' 1 I' ' 't ' ego 01 r EIia' 111111: 0. � 00 _,_ 111013M A0 U 3141d 11.430 U3d 0 N 0 0 100' LOO" 00' 000' C 00' W0' e00' 0 0 XRAIX SIZE IN MILLIMETERS w 1 W N N O M 111012M A9 11999Y00 1N)0 Q Q R 3 R Yid R P. 8 1oa 1'? cn 1 r IN� 111ma In P 1"0° Y S00' t r. . . a 9 O ---1- }i -i-�- - .. _ , 900' z 1111 900. .1 000' 1 .Yy. .. 10 re W 1- W 2 n S 4 CC ° 20 lIrIoiNw O O 40' 1 Ill 20' 1.0 r. I-4 1 IN S 0 i-- ' I i i 1,0' T17 - --_ ♦_-G - __ -- 90' 00y 0 --+-I-r--t—r- 1I 1 iL I, - _` __ ___ _ 00 g001 00—r ..1.. --ty I T- + -1 -I.i I . --i 1 - I < m 09 1 j r --r ± -t- Z. in 09141 tr1-1 7 r 1 -4-'1 9 s O9 'I at 1 II- - 9 0 91 - V> _ -r t m w w 179 s 01 -r I 11W , L 9 } J 0 Z = et Y � I III J S p 'Y y W 9,4 it lIii,ffN.:' I N NI ° ° X Y i 11111 �1 OS 0 Or U. C , - ■ IIni mg00 D9 9-0 It N. Y-- 0 1 1 III 11111 - - 1 o 0 n n 0 ' 0 0 0 00002 _ Z Y n 111DIJM A9 N31414 CAW 1014 1/4.11 ,.� I oo aoE 9, d h I u F D,o c V N � Eo E )..ccooro ct air .91f� 1 V p r,1 uy W M 0 0 0 .1.1-1 12M A0 119f11Y00 1N70 R S R $ Yld o $'ll 8 SIEVE ANALYSIS HYDROMETER ANALYSIS SIZE OF OPEHING IN INCHES I NUMBER OF MESH PER INCH, U.S. STANDARD ppj Y {rCRAIN SIZEIN pINpp Cp. X. p fpr N= = M N. 0 M Y A O D rvOO O q O O 0,000 O O O O O C I I f I o0 1 1 111 1111 200 wo •■ 14 ! s 0 900. p p• a 000' --- ---Et-- — t - .-i__,. t4 m r- 1 10' i � —j LO' YO T 1 i 00- t 11 1 r --; - ` 00 rI –,--,1-1 yy 1+ i- -� -.-4 --t -I-1-4 -I- -r - -1-3 t- -t- -}- 1 Y -++ -1 t '-1 Eli 9 -"- +" "f 9' J-r +-F -{ 1 —i 1 -r n W W L Y I III C y La lmiJJj 1 ---1 --r -1 -F - x-11 + OC Lot. Q,... I - -- - •09 100, •L o u (J o i u + o 0 0 O P W F N y /1 f1 1,10I2M AO 1/ 3141.9 1N10 ind SOIL CLASSIFICATION CHART SILT OR CLAY CLAYEY SILTY SILTY GRAVELLY SAN[) GRAVELLY SAND SANDY GRAVEL OR- 'SILTY R.SILTY GRAVEL QRAVEL GRAVEL GRAVEL (+#4SCREEN) % BY WEIGHT NONFROST SUSCEPTIBLE SOILS ARE INORGANIC SOILS CONTAINING LESS THAN 3% FINER THAN 0.02 mm. GROUPS OF FROSTSUSCEPTIBLE SOILS: Fl 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 IAN 15% FINER THAN 0.02 mm. c, LEAN CLAYS WITH PLASTICITY INDEXES 01= LESS TFIAN 12. d. VARVED CLAYS. LL .1 a epgw.t'enp to xn 8mnnb . uyop+op 5'.Zo,-m5 IIS 'MS A9'M 1 '1;5 ue In! .nrypl eppo x la Oas , OOP 'owu II. o a pun uonnp) ,spy to segmW faomSmpmdxl an Ire moq port pup mnS p,aSmuniaA nn•! I Q In111111 N181J l�li I1�11111 N II II" II Its ri 9 Y° ml '191111111011111 11- NIIIu11 wpm I DIN IN1 1 1111111 IIII°-. v n n 2 U OLI"I'u ue,1- i t aI.l a, . mr , vliry unpeppguip Nal) Japan ua.av Si moung a4, p up aplyl apom v>loas V 1 11 re jo nos, ,p1r,.,, I.111 up qu.,,pues alun• 1 "SPI pnnn mal „ eyl i.l� rp a.n ipyunp ,nqV cputS 3 ye OS ury„avl n1 push' %Apia put ups OS uryunua8 ;mot ',PIP!' ,Ari, pm gyp „Ilam n pu„nn I„ Ilnl n.y, sinks pnnnMJut J a J 3'< 6,l/ , Cdr.' , Mr. Tod Youngs P.O. Box 4-2482 Anchorage, AK 99509 Subject: 4040 "B" STREET ANCHORAGE, ALASKA 99503 (907) 278-1551 August 8, 1978 W.O. #A18567 Subsurface Investigation for Youngs.Stabdivision Located in the SW 1/4, Section 3, T. 11 N., R. 3 W., Seward Meridian, Alaska Dear Mr. Young: We were requested by Mr. Dave Grenier with Tryck, Nyman & Hayes to perform a preliminary subsurface investigation on the above referenced parcel to ascertain its suitability for construction of on-site sewage disposal systems in conjunc- tion with the development of R-6 type lots. A total of seven, 16' test holes were drilled on the site using a track mounted Mobile Drill B-50 drill rig owned and operated by Denali Drilling, Inc. The test holes were logged and the drilling supervised by Mr. Terry L. Barber, staff geologist with Alaska Testlab. Each hole was drilled using continuous, solid flight auger. As the drill bit was brought to the surface at 5' intervals, samples were taken directly off the drill bit, placed in sealed plastic bags and transported to the laboratory where their natural moisture content and dry strength were determined. Each sample was then visually classified with samples of similar color, texture, and grain size distribution being given an arbitrary group designation. Further testing was then performed on composite sample from the group rather than on individual samples. Due to the necessity of getting this report out prior to the Municipal Planning meeting, we have not yet completed the laboratory testing on the soils samples. We have therefore, included with this report copies of the field logs and no laboratory test results. In a few days an addendum to this report will be issued with the final test hole logs, descrip- tion of soil types encountered and copies of the laboratory test results. Mr. Tod Youngs August 8, 1978 Page 2 Slotted, 3/4" PVC pipe was placed to full depth in test holes #1, #5, and #7 and a percolation test run in those holes. The results of those percolation tests are: Test Hole #1: 10 minutes/inch Test Hole #5: 8 minutes/inch Test Hole #7: 20 minutes/inch In addition, to drilling the holes and running a percolation test, our geologist walked the entire site, mapping out the paths of the two streams that transverse the site. It became obvious from the drilling, and from walking the site, that there were areas of poor drainage the ground surface and shallow soils were saturated. Four major areas where this occurred were identified and are mapped out by the geologist. These are shown on Figure 1. In addition, there were two areas where seepage was coming out of road cuts and those were also identified on the enclosed Figure 1. It should be noted that shallow, subsurface water„w4s encountered in test holes #4, #4A, #2, and #6. There is some problem with subsurface water on this site. Except in the areas immediately adjacent to the two streams, we do not feel that this shallow, subsurface water is true ground water, or even perched water. It is our opinion, that it is merely surface runoff associated with the heavy rains of the past two months that has not drained properly and has saturated certain areas of the site. This saturation generally extends to a realtively shallow depth, i.e., less than 10'. In other cases, it is following more permeable seams and may exist relatively close to the surface, say less than 10'. Based on the data that we have collected there should be no problem, from a permeability standpoint, with constructing on-site sewage disposal systems to meet Municipal standards on all proposed lots within the subdivision. Additional soils and percolation data may be present to give specific. design values for certain lots. We refer you to Table B included in this report, that is the summary listing of each lot of the subdivision with an estimated percolation rate. However, due to the presence in some areas, as identified on Figure 1 of shallow, subsurface water, it may be necessary. to do additional testing to verify locations on specific lots where shallow, subsurface water will not affect the on- Mr. Tod Youngs August 8, 1978 Page 3 site disposal system. It may also be necessary to reduce the area of influence, and the amount, of shallow, subsurface water through the use of improved drainage. and ditching. This matter needs further consideration. If we can offer any clarification for any item discussed in this report or any data presented, please contact us. Very sincerely, ALASKA TESTLAB Wagu fes. ocawit Melvin R. Nichols, P.E. Laboratory Manager MRN:rb:mm Enclosures TABLE B Percolation Lot Rating Comments Block 1 1 2 3 4 5 Block 2 1 2 3 4 (Continued) 8 Min/inch Measured rating. 12 Min/inch 15 Min/inch 15 Min/inch 12 Min/inch 12 Min/inch 20 Min/inch 20 Min/inch 20 Min/inch 20 Min/inch Estimated rating. Keep system in SW portion of lot. Estimated rating. Keep system well above stream and wet area. May encounter shallow subsurface water. Estimated rating. Control shallow subsurface water or find a spot on the lot where it does not present a problem. Visual rating. Control shallow subsurface or find an area on the lot where it does not present a problem. Visual rating. Control shallow surface water or find an area found on the lot where it does not present a problem. Measured rating. System needs to be kept to the rear of the lot to avoid problems with shallow subsurface water. Measured rating. Keep the system to the rear of the lot to avoid problem with shallow subsurface water. Measured rating. Keep the system mid -way between the two streams to avoid shallow subsurface water. Estimated rating. Keep the system mid -way between the two streams on the ridge to avoid problems with shallow subsurface water. Table B (Continued) Percolation Lot _ Rating Comments (Block 2) 5 12 Min/inch Estimated rating. Keep the system to the north portion of the lot to avoid _shallow subsurface water problems. 6 20 Min/inch Estimated rating. Shallow subsurface water if encountered should be controlled or an area on the lot found where it does not present a problem. 7 20 Min/inch Estimated rating. Shallow subsurface water when encountered must be controlled or found on an area of the lot where it does not present a problem. Block 3 '1 NOTES: 10 Min/inch Measured rating. 1. All estimated ratings are from extropolated data and are intended to be quite conservative. It may prove economic on those lots to actually place a test hole and run a percolation test prior to constructing a system on the site. This is particularly true on Lots 3, 4, 5, 6, and 7, Block 2. 2. It is anticipated that shallow, subsurface water may present problems in Block 1, Lots 2, 3, 4, 5, and 6; Block 2, Lots 6 and 7. 1 • i r W KA---TESTLAd Test Hole Field Log Client TOL)) Y- }/tAk,m Project Hole No. W.O. No. A-lh'.C;r' Vo , Y e'5 3C' f,; ,J Date 7- ;7? Water Level While Drilling So o Logged By "/-: Location Water Level After Drilling Driller 17 Frost %/ n i„-' Drill r - '1 // Weather FYOW” N pe r,/ ,.. 1( L' i 1®11 111 _ ...� ALA$KA---TESTLAB client Test Hole Field Log W.O. No, A-ms/"r? Project y n:, . i � � Date 7- 2 9- 7,5 Hole No. �1 d� Water Level While Drilling Logged By 72/7% �� Location Water Level After Drilling 3' i }wc da�.is 10'1 vDriller /: t Frost /;f • Drill t _ (-7i "`Weather O p �r BLOWS/6° 7. r, vDrr,vi fer:--/-" i 3,• 71' , ifv) vVe✓) Ve vl C / 7.5h iT _ C'vde-i 5'iyio / waf..,//y ifav_ .j,l;_9 :1 ",f- 1 ins y C ALA$KA EST LAS Client Project '✓,..,--> Test Hole Field Log Hole No. Li Water Level While Drilling Logged By— Water Level After Drilling Driller W.O. No._ Date ;'- y' Location Frost 0Drill Weather Standard Penetration ra rpi. v r Client Project y - J Hole No. Location Test Hole Field Log Water Level While Water Level After Frost //fr + 1 ' �. Logged By -7- W. O. - W.O. No. A ' Date Driller !,t -L, S. Weather 0 0 0 Tp Standard Penetration BLOWS/6° nr rr / 111111,111 Sr* -S-s0,_ a- /© r; et- N. S, ciI- a, Sa/1C1 �firr,`i (�l/y/ e -- ! 1 C I3O� U � �a fes%/ / . ■ ; Client %s„ r Project `<;,, 'Si h Hole No. 5 Water Level While Drilling �if" /c Logged 99 By Location Water Level After Drilling Driller i"':4,' Frost / /11 -,Drill /.'- Weather Test Hole Field Log W.O. No. »' , Date ?-7 't» i 0 (T�� /- ti- Teo} s°'��. 1 :% )�;Jr , 6 r N s i So. Gra V/ I /1=- '- TAT (3rN V. —Ce— c� 1C ah% /j//J v, Si SGn cl / ice% _- to Client Project_ Hole No. (p Location ISNIIMS•miumulleorame Test Hole Field Log _ W.O. No. �' 1 ; Date ?- 7 - ;- Water Level While Drilling �` YJ Logged By Water Level After Drilling Driller „(o -PL: Frost '- : r Drill Weather r 1 ]u $ @ Y° 25, .moi -_ =7E7 i 0 7 ALA$K Z--TESTLAB Client Project Y,u Hole No. 7 Location Water Level After Drilling • Test Hole Field Log W.D. No.4/r sO2-7 Date 5 7- 7r Water Level While Drilling //,'r. •, Logged By 77? Frost l Drill Driller Weather /44 l )c OBJ O � O P4 4 Q\cem� a 0 p Qc Q p9� pO° Q pP0 Q ,sq. 1 pO O4.O O\C P 0p 0 �'`� © OJyO OdPy OpP O Opy ylO OP�JO4,y\�O 0 P J.pS�pPpe•°Jai �y Standard \� Penetration O�� O O O ��C�Pi y, ppy\ �,O t`��: OO py 4 _14' O`J� ��F Q p 4 pF 6•pp • O 0\' 4 Ord O ° 60 9 p�0004. `4' 9R [� 4.° �. \ G 4,6 3i pa6 -14' ' 4,c' t \ 4,. 4 a�°: Pad 0 p\ S, ,�J G y� 6\ 4'� Y Ov Q,O 6^'. `oi BLOWS/6" 0` 0`5 P 04' 0° `6 .. Qv Q. ht. 'Cgict4 /7r�i, f ill .5- /-IIII . , wu:. ® —� ,,/ i i.:i ') L. j 7a, I. "gr//' f S/ rA, fri O/ DJC, f i0. ■ �,��.0 �' �� Main• • . Ai, 1't. a c..' C v ii. : 1111111 .. .1. il Test Hole Log — Description Guide The soil descriptions shown 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 examination. The logs often include the following items: Depth Interval — usually shown to 0.1 foot, within that zone no significant change m soil type was observed through drill action, direct observation or sampling. Frost Classification — NES, F1, 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: dry, no 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, if a free draining soil; dilatent at natural moisture concent, if a non -plastic silt or fine sand; (The moisture content is further defined by reference to PI, Lw, NP, M'7 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 amore -or -less cohesive soils and fine grained silts of flue clay -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 1.3/8", Shelby tube 3", auger (lights (minute -man) 2", Auger flights (13-50 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 the hole log must be considered for an -indication 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. P1; natural moisture content believed to be less than plastic limit PFr; natural moisture content believed to be between plastic and liquid Omits Lsw; natural moisture content believed to be greater than liquid limit • NP; non -plastic, useful as a modifying description of some silty mathrials. Dilatencv — is the ability of water to migrate to the surface of a saturated or nearly saturated sod sample when vibrated or jolted — wed as an aid to determine if a fine grained soil is • slightly or non -plastic Gilt or a volcanic ash, Rock Flour — finely ground soil that is not plastic but otherwise appears situ rro 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 may include tundra, muskeg and bog material, - -• Muck — a modifier used to describe very soft, semi -organic deposits inn y accusing below a peat deposit. Amorphus peat -- organic particles nearly or fully disintegrated.. Fibrous Peat — organic particles more -or -less intact. Bottom of Testhole — includes last sample 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 sa rnples, 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 AL 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, else standard penetration. 04% — natural moisture content 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, Li, "grab" disturbed sample from auger flights or wall of trench, II, cut 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 Group — The samples are placed into apparently similar groups based on color and texture and are arbitrarily assigned a group :et ter. Further disturbed tests including At terberg Limns, grain size, moisture -density relationship, etc. may be performed on the group and are assumed to reflect the general distr uhed characteristics of the soils assigned to the group, This is an important phase of the soil analysis and 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 M a 0 4, s 0 30% GRAVEL 4, 4, V 0 0 Q CLAYEY. OR SILTY OR SILTY SILTY GRAVEL GRAVELLY SAND SANDY GRAVEL GRAVELLY SAND SANDY 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 LESS THAN 3% FINER THAN 0.02 mm. GROUPS OF FROST -SUSCEPTIBLE SOILS: Fl 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 WITI-I 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. 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