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HomeMy WebLinkAboutT12N R3W SEC 22 LT 16 GR.E.~T.ER ANCHORAGE AREA BORb-~,GH Department of Environmental Quality 3330 C Street Anchorage, Alaska 99503 INSPECT~ON,REPORT, ON-SITE SEWAGE DISPOSAL SYSTEM NAME~~..9~ MAILING ADDRESS ~!~,~ ~'~ ~zl,,z~ PHONE ~>C~ 7_~_.~ LOCATION r~- ~(~ L I~::~ __,-.~EG'AL DESCRIPTION ' I' SEPTIC TANK: DISTANCE FROM WELL INSIDE LENGTH MANUFACTURER INSIDE WIDTH NUMBER OF COMPARTMENTS LIQUID DEPTH LIQUID CAPACITY ,~/-'~")~'2GALLON$, TILE DRAIN FIELD: FOUNDATION /~) l'jr DISTANCE BETWEEN LINES SQ. FT. LENGTH OF EACH LINE DEPTH OF FILTER NEAREST LOT LINE / ,~_,~ I TOTALoF LINEsLENGTH ..~,~),.. ~//A TRENCH WIDTH "~ ~'~IN. TOTAL EFFECTIVE DEPTH ABSORPTION AREA DEPTH: TOP OF TILE TO FINISH GRADE .~t MATERIAL BENEATH TILE_~'?>I Type ~.~;g~' EONSTRUETION SEEPAGE SYSTEM BUILDING NEAREST NEAREST SEPTIC FOUNDATION LOT LINE __ SEWER LINE TANK i~. ABOVE TILE ¢ IN. DISTANCE FROM: CESSPOOL OTHER SOURCES APPROVED DISAPPROVED REMARKS DISTANCES: INSTALLED BY: ~¢~(~_i SEWER LINE DEPTH: PIPE MATERIAL: LOT SLOPE: 'S¢ REMARKS: DIAGRAM OF SYSTEM G.A.A.B. Form LQ-032 GREA,.~R ANCHORAGE AREA BCEx ~'JGH PERMIT NO. SEWAGE DISPOSAL SYSTEM -- APPLICATION AND PERMIT ,N,"ALLAT'O" '-O AT'ON '¢ FINANCED THROUGH ~ ~O BE INSTALLED '' COMPLETION DATE ANTICIPATED FINAL INSPECTION: 24 HOUR NOTICE REQUIRED. BACKFILLING OF ANY SYSTEM WITHOUT FINAL INSPECTION BY THE DEPARTMENT OF ENVIRONMENTAL QUALITY AUTHORITY WILL BE SUBJECT TO PROSECUTION. / MINIMUM DISTANCES, REQUIREMENTS DIAGRAM OF SYSTEM FOUNDATION TO SEPTIC TANK FOUNDATION TO SEEPAGE Pit. SEPTIC TANK TO S~~ WATER MAIN TO SEPTIC TANK SEEPAGE PIT CAST IRON INTO AND OUT Of SEPTIC TANK AND INTO CRIB CROSSING GAP OF EXCAVATION 5 FEET INTO UNDISTURBED SO]L. 4 INCH DIAMETER CAST IRON SIPHON PIPES ON SEPTIC TANK AND SEEPAGE PIT FITTED W'TH Al RTIGHT REMOVABLE ~AP'' .~ // ,,~ // CONFORM TO BOROUGH REGULATIONS REGARDING INSTALLATION, I CERTIFY THAT I AM FAMILIAR WITH THE REQUIREMENTS OF GREATER ANCHORAGE AREA BOROUGH ORDINANCE NO. 28-68 AND THAT THE ABOVE DESCRIBED SYSTEM IS IN ACCORDANCE WITH SAID CODE. CON.SULTANT:5. INC. JUNEAU October 17, 1975 R & M No. 562145 Rappe Excavating 8001 Arctic Blvd Anchorage, Alaska RE: Test Hole and Soil Log Report for Sanitary System Lot 16, Section 22, T12N, R3W, S.M. Dear Mr. Rappe: We are submitting herewith the test boring results and our comments regarding soil conditions encountered at the subject site. This inves- tigation was performed in accordance with your request of October 16, 1975, and those procedures outlined in a letter dated July 15, 1975, by Mr. Rolf Strickland of the Greater Anchorage Area Borough Department of Environmental Quality. g single test hole was put down within the Lot 16 area for the purpose of defining general subsurface soil conditions for the proposed sanitary system. Excavation was accomplished with a tractor-mounted backhoe and the test hole was extended to e total depth of 16.0 feet below ground surface. The final log prepared for the test hole has been included in Drawing A-01. Ground water was not encountered in the test hole. We appreciate being given this opportunity to be of service to you. Should you have any questions with regard to the above, please do not h=o~t~te to contact us. Very truly yours, R & M CONgULTD~NTS, INC. ames . Rooney Vice President JWRIWEDI j a xc: GAAB no scale TH-1 10-17-75 0.0~ ORGAMICS ORGANIC SILT (PfL) 0.5~ SANDY GRAVEL TRACE SILT . (GW) 1.5t SA~ TRACE SILT (SP) SAND?. GRAVEL TRACE SILT IIRNY COBBLES (GW) SAND TRACE TO SOME SILT, SOME GRAVEL (SP-SM) 200 sq.feet/bedroom '5.0' 8.0T 10.0' 16.0' T.D. NO WATER TABLE Log represents location of test hole, Lot 16, Section 22, T12N, R3W, S.M. Consultants Inc. ALASKA J'0NEAU RAPPEEXCAVATING Log of Test Hole Anchorage, Alaska oAr~ 10-~17-7. sc.~u~' 1"=3~ SY WED ~ED ~=~OO. NO. 562145 rows NO.A-01 $00THCE~iTRAL fiEOIO~V;4L OFFICE / / JAY S. HAMMOND, Governor / ANCHORAGE 99501 May 15, 1975 Mr. Lynn Coad DepL. of Environmenatl G/biB Z3S0 C Street Anchorage, All 99503 Quality SO. bject: !%ter System-Amazing Grace Lutheran'Cburch at O'Malley & Dear ~lr, Ccsd: This office has no objection to the placement of the well 100 feet from any septic tanks and 120 feet from any seepage pits. This is based on conditior..s d5scussed with tim applicant regarding J-.imitir~g the supplying cf water to 'the public. If you have any questio~}s about the abo~e please do not hesitate to contact us, Yours truly, Regional Environmental gll~ e-r'v5 SOT cc: Amazing Grace Lutherar_ Cb. urch 4040 "B" STREET, ANCHORAGE, ALASKA 9(;503 PHONE: 907-279-2581 April 16, 1975 W.O. 17283 Mr. Lee Glenn Star Route A, Box 56 Anchorage, Alaska 99502 Subject: Soils Investigation ~/ Location: Amazing Grace Luthern Church Grid 2636 Gentlemen: Transmitted herein are the results of the subsurface investiga- tion performed on the subject property on April 11, 1975. Exploration consisted of two 10' test holes and one 20' test hole drilled by Denali Drilling, Inc. employing a Nodwell mounted, Mobile B-50 drill, fitted with a 6" continuous flighb auger. Grab samples were taken at various intervals by pulling the auger out of the test hole and removing the sample from the flights of the auger from near the bit. The soils were visually classifie6 in the field in accordance with sheets 4 through 6, following the text. The field classification was verified by laboratory review of samples based on the same criteria. The drilling was supervised and the test hole were logged by B.D. Kenworthy, technician of our staff. The results of the field and laboratory effort were compiled in the test hole logs and the grain size distribu- tion curves which follow at the end of this letter. For easy correlation between test holes and relation of the numerous samples to representative grain size distribution curves, the samples were visually classified and grouped according to textural similarities. Mechanical analyses were performed on each group to further identify the soils properties. Group A is an NFS, gravelly sand (SP/SM), poorly graded, with 1.27 percent finer than 0.02 nm. Based on established Greater Anchorage Area Borough critieria, the seepage area for one bedroom would be 150 square feet/bedroom. See Sheet 1. Mr. Lee Glenn April 16, 1975 Page Two Group B is a coarse silt to fine sand, uniformly graded, and is classified F-4, sandy silt (ML), with 5.5 percent finer than 0.02 mm. See Sheet 2. Group C is an F-2, silty sand (SM) with 3.5 percent finer than 0.02 mm. See Sheet 3. We trust the foregoing is sufficient to our immediate needs. Please feel free to call if questions arise in this regard or should we be of further service as the project develops. Very truly yours, ALASKA TESTLAB ' John M. Lambe Approved: H. R. Lee, P.E. JML:pf Attachments Test Hole 1 Depth in Feet From To 0.0' 2'± 2'* 4.0' 4.0' 8.0' 8.0' 10.0' TABLE A W.O. 17283 SOIL DESCRIPTION F-4, brown sand~ silt, damp, medium density, 2"-, ML F-2, brown silty sand, damp, density, 2"-, SM medium NFS, brown sandy gravel to ra~ll~ sand, damp, medium density, 2"-, SP/SM ' NFS, brown grgvelly sand, damp, low to medium density, 2"-, SP/SM Bottom of Test Hole: 10.0' Frost Line: Free Water Level: Type of ~ Depth Sample M% 1 2.0' Grab 6.6 2 4.0' Grab 2.5 ~3 6.0' Grab 2.9 4 8.0' Grab 1.8 5 10.0' Grab -3.0 None observed None observed Dry ~trength ~rou~ Unified L-N B ML N C~ SP/SM N A SP/SM N A SP/SM N A SP/SM Remarks: Group: refers to this study Unified: See explanation of Dry strength: L = low, only code on Sheet 4. N = none Test Hole 2 Depth in Feet From To 0.0' 3.0' 3.0' 5.5' 5.5' 7'.0' 7.0' 10.0' Bottom of Test Hole: Frost Line: Free Water 2 3 5 Level: Type D__epth Sa~m~le 2.0 Grab 4.0' Grab 6.0' Grab .8.0' Grab 10.0' Grab of Table A W.O. 17283 SOIL DESCRIPTION NFS/F-2, brown silty sand, damp, medium density, SP/SM NFS, brown sandy gravel to gravelly sand, low to medium density, 2"-, SP/SM NFS, brown gravelly sand, damp, low to medium density, SP~S-~ F-4, brown sandy sil~, damp, low to medium density, ML 10.0' None Observed None Observed Dry M% Strength Gr__ou~_ 6.4 None C SP/SM 5.8 None A SP/SM 10.7 None A SP/SM 5.3 Low-None B MI, 7.3 Low-NOne B ML Unified Classification Remarks: 1. Group: refers to this study only 2. Unified:" See Sheet 4, attached Test Hole 3 Depth in Feet From To 0.0' 4.0 4.0' 18.0 18.0' 20.0' Bottom of Test Hole: Frost Line: Free Water Level: Table A SOIL W.O. 17283 DESCRIPTION F-2, tan silty gravel~ sand., low density, 1"-, SM damp, NFS, brown gravelly sand, damp, density, 1-1/2"-, SP/SM 1 OW F-4, tan sandy silt, damp, low density, ML 20.0' 0.0'-0.5' None observed Type of Dry Sampl__e pept~ Samole M% Stre_ngth I 5.0' Grab 3.2 None 2 10.0' Grab 5.9 None 3 15.0' Grab 3.8 None 4 20.0' Grab 7.8 Low--None Group A SP/SM A SP/SM A SP/SM B ML Unified Classification Remarks: 1. Group: refers to this study only 2. Unified: See Sheet 4 0 0 0 · I 0 0 o _o o ,~ t 0 0 0 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 in soil type was observed through drdi action, direct observation or sampling. Frost Classification - NFS, Fl, F2, F3, F4, see "Soft 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: ~, no or little apparent surface moisture, damp, moisture forms portion of color, less than plastic limit, wet, no free water, ofien soft, if cohesive soil, .saturated, free water may be squeezed out, if a free draining soil; dilatent at natural moisture content, if a non-plastic silt or fine sand. (The moisture content is further definedby reference to Pl, LW, NP, M% or dilatency.) Density - refers to more ordess non-cohesive soils, such as ~and 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 the clay-silt grohps. Derived from dr ac on 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 flights (minute-man) 2", Auger flights (B-50 hollow stem) 6"-8". Larger particles are described indirectly by action of the drftling and are 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 Lin]its -- useful for fine grained and other plastic soils. PI; natural moisture content believed to be less than plastic limit PI+; natural moisture coutcnt believed to be between plastic and liquid ITmits L~w+; natural moisture content believed to be greater than liquid limit · N~P; non-plastic, useful as a modifying description of some silty materials. Dilateucy -- is the ability of water to migrate to the surface ora saturated or nearly saturated soil sample when vibrated or jolted - used as an aid to deter~ninc if a flue grained soil is a sligi~tly or non-plastic silt or a volcanic ash. Rock flour -- finely ground soil that is not plastic but otl/erwise appears similar t~ chyey silt. Organic Content - usually described as Peat, PT, =ometimes includes discrete paIticles such as wood, coal, etc. as a modifier to an inorganic soil. Quantity described as; trace, or an estinrate 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, semborganic deposits usually occuring below a peat deposit. Amorphus peat -- organic particles nearly or fully disintegrated. Fibrous Peat - organic particles more-ordess intact. Bottom of Testhole -- includes last sampl~ interval. Frost Line - seasonal frost depth as described by drilling action and/or samples?t 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. Blowl6' - The number of blows Of a 140 weight free falling 30" to advance a 2" split spoon 6"; the numbe} of blows for a 12" advance is, by definition, the standard penetration. M% -- natural moisture content Of the soil sample, usually not performed 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, thin wall tube, "Shelby" used to obtain undisturbed samples of fine grained soil, ~, "grab" disturbed sample from auger flights or wall o£ trench, C_., cut samp!e, undisturbed sample from xvall of trench. Dry Strength -- a useful indicator of a soil's clayey fiaction, N=Nonc, L=Low, M=Medium, H=High Group -- The samples are placed into apparently similar g~oups based on color and texture and are arbitrarily assigned a group letter. Fmther disturbed tests including Attcrberg Lindts, grain size, moisture-density relationship, etc, may be performed on the group and are assumed to reflect the geueral distrubed characteristics of the soils assigned to the group. Thi~ is all bnportant phase of the soil analysis and is uscd to standardige the ~rious qualitative determiuations aud to reduce the number of quantitative tests necessary to describe the soil mass. It is the resoonsibiLity of the owner, prior verify proposed building location on lot, grade, also ~o determine the existence of any easemencs, ions wh£ch do no'[ appear on the recorded plat. i hereby certify that a survey of was made by me or under my direct supervision and the properly corners marked7as indicated. Donaid O.'Saur CONTL~O~ INt~ ENGINEERS ~o Construction to and uLility connections, FROM: TO: GREATER ANCHORAGE AREA BOROUGH RECEIVER: REQUESTED ACTION SCHEDULE FOR INFORMATION ONLY PREPARE BACK-UP INFORMATION FOR IMMEDIATE ACIION Q CALL ME BEFORE YOU ANSWER ~ NEED YOUR RECOMMENDATION FOR YOUR CONSIDERATION OTHER 4040 "B" STREET, ANCHORAGE, ALASKA 99503 PHONE: 907-279-2581 April 16, 1975 W.O. 17283 LOT Mr. Lee Glenn Star Route A, Box 56 Anchorage, Alaska 99502 TIz J Subject: Soils Investigation Location: Amazing Grace Luthern Church Grid 2636 Gentlemen: Transmitted herein are the results of the subsurface investiga- tion performed on the subject property on April 11, 1975. Exploration consisted of two 10' test holes and one 20' test hole drilled by Denali D~ill-ing', Inc. employing a Nodwell mounted, ~obile B-50 drill, fitted with a 6".continuous flight auger. Grab samples were taken at various intervals by pulling the auger out of the test hole,and removing the sample from the flights of the auger from near the bit. The soils were visually classified in the field in accordance with sheets 4 through 6, following the text. The field classification was verified by laboratory review of samples based on the same criteria. The drilling was supervised and the test hole were logged by B.D. Kenworthy, technician of our staff. The results of the field and laboratory effort were compiled in the test hole logs and the grain size distribu- tion curves which follow at the end of this letter. For easy correlation between test holes and relation of the numerous samples to representative grain size distribution curves, the samples were visually classified and grouped according to textural similarities. Mechanical analyses were performed on each group to further identify the soils properties. Group A is an NFS, gravelly sand (SP/SM), poorly graded, with 1.27 percent finer than 0.02 mm. Based on established Greater Anchorage Area Borough critieria, the seepage area for one bedroom would be 150 square feet/bedroom. See Sheet 1. Mr. Lee Glenn "April 16, 1975 .Page Two Group B is a coarse silt to fine sand, and is classified F-4, sandy silt (ML), finer than 0.02 mm. See Sheet 2. uniformly graded, with 5.5 percent Group C i~ anF-2, silty sand (SM) with 3.5 percent finer than 0.02 mm. See Sheet 3. We trust the foregoing is sufficient to our immediate needs. Please feel free to call if questions arise in this regard or should we be of further service as the project develops. Very truly yours, ALASKA TESTLAB John M. Lambe Approved: H. R. Lee, P.E. JML:pf Attachments I Test Hole 1 Depth in Feet From To 0.0' 2'± 2'± 4.0' 4.0' 8.0' TABLE A W,Oo SOIL DESCRIPTION 17283 '8.0' '10.0' Bottom of Test Hole: Frost Line: Free Water Level: F-4, brown sandy silt, damp, medium density, 2"-, ML -- F-2, brown silty sand, damp, medium density, 2"-, SM NFS, brown sandy gravel to gravelly sand, damp, medium density, 2"-, SP/SM NFS, brown gravelly sand, damp, low to medium density, 2"-, SP/SM 10.0' None observed None observed Type of Sample Depth Sample M% I 2.0' Grab 6.6 2 4.0' Grab 2.5 3 6.0' Grab 2.9 4 8.0' Grab 1.8 5 10.0' Grab 3.0 Dry Strength Group Unified L-N B ML N C SP/SM N A SP/SM N A SP/SM N A SP/SM Remarks: Group: refers to this study only Unified: See explanation of code on Sheet Dry strength: L = low, N = none Test Hole 2 Depth in Feet From To 0.0' 3.0' 3.0' 5.5' 5.5' 7.0' 7.0' 10.0' Bottom of Test Hole: Frost Line: Free Water Level: Type of ~ample Depth ~mple 1 2.0 Grab 2 4.0' Grab 3 6.0' Grab 4 8.0' Grab 5 10.0' Grab Table A W.O. 17283 SOIL DESCRIPTION NFS/F-2, brown silty sand, damp, medium 'density, SP/SM NFS, brown sandy gravel to gravelly sand, low to medium density, 2"-, SP/SM NFS, brown gravelly 'sand, damp, low to medium density, SP/SM F-~, brown sandy silt, damp, low to medium density, ML 10.0' None Observed NOne Observed Dry M% Strength Grou~ 6.4 None C SP/SM 5.8 None A SP/SM 10.7 None A SP/SM 5.3 Low-None B MI, 7.3 Low-NOne B ML Unified Classification Remarks: 1. Group: refers to this study only 2. Unified:~ See Sheet 4, attached Test Hole 3 pepth in Feet From To 0.0' 4.0' 4.0' 18.0' 18.0' 20.0' Bottom of Test Hole: Frost Line: Free Water Level~ Type of Sampl~ D~pth Sample 1 5.0' Grab 2 10.0' Grab 3 15.0' Grab 4 20.0' Grab Table A W.O. 17283 SOIL DESCRIPTION F-2t low density, 1"-, SM NFS, brown gravelly sand, density, 1-1/2"-, SP/SM F-4, tan sandy silt, damp, 20.0' 0.0'-0.5' None observed tan silty gravely sand, damp, damp, low iow density, Dry M% Strengt~ Group 3.2 None k SP/SM 5.9 None A SP/SM 3.8 None A SP/SM 7.8 Low-None B ML Unified Classification ML Remarks: 1. Group: refers to this study only 2. Unified: See Sheet 4 o o g :g g g 0 0 0 o ~ o 0 Test Hole Log - Description Guide Thc soil descriptions shown on tbe logs are the best estimate of the soil's characteristics at the time of field examinafion and as such do not achieve the precision of a laboratory testing procedure. [f the log includes soils samples, those samples receive an independent textural classification in the laboratory to verify the field exanilnation. The logs often i. nclude the following items: .Depth Interval - usually shown to 0.I foot, within that zone no significant change in soil type was observed through drill action, direct observation or sampling. Frost Classification -- NFS, Fl, F2, F3, F4, sec "Soil Classification Chart" Textm'e 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, ifa free draining soil; dilatent at natural moisture content, ifa non-plastic silt or fine sand. (The moisture content is further defined by reference to PI, LW, NP, M%or dilatency0 Density refers to more-or-less non-cohesive soilsi such as sand gravel mixtures with or without a fine fractinn, derived from drilling action and/or sample data; usually described as: very loose, loose, medinm dense, very dense. General intent is to portray earthwork characteristics. Stiffness refers to more-or-less cohesive soils and fine grained silts of the clay-silt groups. Derived frown 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 flights (minute-manJ 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, 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. PI; natural moisture content believed to be less than plastic limit PI+; natusal moisture content believed to be between plastic and liquid l~nits L~w+; nattttal lnoisture content believed to be greater than liquid limit N~P; non-plastic, useful as a modifying description of some silty materials, Dilatency - is the ability of water to ndgrate to the surface of a saturated or nearly saturated soil sample when vibrated or johed - used as an aid to determine il'a fine grained soil is a slightly or non-plastic silt or a volcanic ash. Rock ~]our - finely ground soil that is not plastic but otherwise appears similar to 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 b~g materiah Muck -- a modifier used to describe vesy soft, semi-organic deposits usually occuring below a peat deposit. Amorphus peat organic particles nearly or fully disintegrated. Fibrous Peat orgaxilc particles more-or-less intact. Bottom of Testhole -- includes last salnple interval. Frost Line -- seakonal frost deptb 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 piezomctcr installations, used only in special cases. Blow/6" The number of blows of a 140 weigbt free falling 30" to advance a 2" sp~it spoon 6"; tbe number of blows for a 12" advance is, by definition, the standard penetration. M% -- natural moisture content of the soil sample, usually not performed on clean sands or gravels below tile water table. Type of Sample - fi_P, refers to 2" split spoon driven into the soil by 140 pound weight, a disturbed sample, S, thin wall tube, "She[by" used to obtain undisturbed samples of fine grained soil, ~, "grab" disturbed sample from auger flights ox' wall of trench, C_., cut sample, undisturbed sample from wall of trench. Dry Strength - a useftd 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 arc arbitrarily assigned a group letter. Further disturbed tests including Attcrberg Limits, grain size, moisture-density relationship, elc, may be performed on the group and are assumed to reflect the general distrubcd cbaeacterisfics of the soils assigned to tbe group. This is an important phase of tbe soil analysis and is used to standardize tile various qualitative determinations and to reduce thc nmnbcr of quantitative tests uecessary to describe the soil mass. SOIL CLASSIFICATION CHART 30% GRAVEL CLAY CLAYEY CLAYEY CLAYEY OR~ CLAYEY OR SILTY SILTY SILTY ~ SILTY GRAVEL SAND GRAVELLY SAND SANDY GRAVEL SAND GRAVELLY SAND SANDY GRAVEL GRAVEL ! 0 20 30 40 50 60 70 80 90 1 O0 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: 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. GRAVELLM 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. CLAMS 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.