1979-08-09 Septic System Design Report

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DESCRIPTIVE TERMINOLOGY PARTICLE RIZE IDENTIFICATION sosus,+rs over 3" Gnewel Coma 1' - 3" Il"um 1 /2" - I" Firsts No. 4 - 1 /2" tend Cosies No. 4 -No. 10 Medum NO. 10 - NO. 40 Fine No. 40 - No. 100 Wry Fine No. 100 - No. 200 silt No. 200 - =5 min Qey lea than AN mm RELATIVE DENSITY OF COHESION LESS SOILS very loon 0- 4 5PF loose L - 10 sPF medium deism 11 - 30 IIPF dense 31 - 50 GPF very defies W MF RELATIVE Petit' 7RT13AIS SOIL INTRUSIONS THICKNEst Mnsm 0 - 1 /8" urns 1I8" - t' Myer V, - 12" waived alternating seems or lenese of cMye and silts in Oaks deposit MOISTURE CONTENT Dry less then 5% Montt under optimum moisture Mt over optimum moisture Watrsrbearing saturated send CONSISTENCY OF COHESIVE SOILS very soft 0 - 1 IIPF soft 2 - 3 BPF rather soft 4- 5 9PF medium 6- 8 IIPF rather stiff 9 - 12 BPF stiff 13 - 16 BPF vary still 17 - 30 BPF hard 30+ BPF RELATIVE ►MCIPORTIONS with a few 0 - 10% with soma 11-20% with over 20% ORGANIC CONTENT 0 - 6% non to slightly organic 6 - 10% slightly organic 11 - 25% organic 26 - 65% muck 66+ out PLASTICITY OF SOILS WITH LESS THAN 20% CLAY non plastic gritty, cannot thread slightly plastic rough to smooth, hard to thread plastic smooth to waxy. easy to thread OF ?L LABORATORY TESTS a tray o - 5% DD Dry Density, pcf OC Organic Content, % a little 6 - 15% WD Wat Density, prof S Percent of Saturation, % some 16 - 30% MC Natural Moisture Content, % SG Specific Grw,Iw, and 31 - 60% LL Liquid Limn, % C Cohesion PL Mastic Limwt, It, 0 Angle of Internal Faction /1 Plasticity Index, % qu Unennfined Cowitwessive Strength DRILLING NOTES: Standard penetration tint borings were advanced by 25G" or 3%" I.D. hollow -stem augers unless noted other- wiss. Jetting wear was used to ck,*n out sugar prior to sampling only where indicated on Iogs. Standard peretraion last borings are designated by the prefi: "ST" (Split Tubal. Power sugar boringe wen advanced by 4" or 6" diameter, continuous -flits. solid stem augers. Soil classification and strata depths are infarred fr m disturbed samples sugared to the surface and are therefore sormewhst pproximass. Power sugar boring are designated by the prefix "B" Hand probing -"re adwertoed manually wwth a 1 h" diameter probe end are limited to the depth from which the probe can be manually withdrawn. Hand probing. are indicated by the prefix 'H". CLASSIFICATION: Classification on Im is., by inspection in accordance with the Unified Sods Classification System (see attached chrtl using visual manual procedures unless noted otherwise. GROUND WATER: Observations wen nude at the limn indicated. Porosity of soil Strata, seasonal weather conditions. site topography, etc., mnay, own changes in the water levels indicated on the log. SAMPLING: All setnptss are taken with the standard 2" O. D. split -tube smmpla, except when noted. TW indicates Stun wall undisturbed srnwit. BPF: Nu lint indcase blows per foot recorded in strtdrd penetration tat, also known as "N" value The sampler is set 6" into ter -disturbed soil below the hollow -stem auger. Driving resistances are then counted for second and third 6" increments and added to get BPF. Mlhere they differ significantly, they two reported to the following form - 2/12 for the second and third 6" increments respectively, WH: WH indieasas that sampler penetrated soil under weight of hammer and rods alone, driving not required NOTE: All "Pate run in accordance with applicable ASTM standards. omen ENGINEERING TESTING