1978-01-24 Septic System Design Report

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DESCRIPTIVE TERMINOLOGY PARTICLE SIZE IDENTIFICATION SOIL INTRUSIONS ' Bowdon over 3" THICKNESS RELATIVE PROPORTIONS Gravel lense 0 - 1 /8" with a few 0 - 10% Cos. 1" - 3 seam 118" - 1" with sane 11 - 20% ' Medium 1/2" - 1" loyer 1" - 12" with over 20% Fine No. 4 - 1/2" varved alternating soomss or Send lenses of clays and Coana No. 4 - No. 10 silts in lake deposit Modums No. 10 - No. 40 Fine No. 40 - No.100 MOISTURE CONTENT ORGANIC CONTENT Very Fine No. 100 - No. 200 Sllt No. 200 - =5 rnm Dry lass than 5% 0-5% non to slightly organic ' Cloy, less then A06 mm Moist under optimum moisture 6 - 10% slightly organic Nbt over optimum moisture 11 - 25% rpnic Waterbsering saturated send 26 - 65% muck 65+ past ' RELATIVE DENSITY OF CONSISTENCY OF PLASTICITY OF SOILS WITH COHESION LESS SOILS COHESIVE SOILS LESS THAN 20%CLAY ' very loose 0 - 4 BPF very soh 0 - 1 BPF non plastic gritty, cannot thread loose 5 - 10 BPC soft 2 - 3 BPF slightly plastic rough to smooth, medum dense 11 - 30 SPF rothw soft 4- 5 BPF hard to thread denea 31 - 60 6PF medium 6- 8 BPF plastic smooth to waxy. ' very dense 50+ OFF rethsr stiff 9 - 12 BPF easy to thread stiff 13 - 16 BPF very stiff 17 - 30 BPF hard 30+ BPF ' RELATIVE PROPORTIONS OF GRAVEL LABORATORY TESTS ' • tram 0 - 5% DID Dry Density, pcf OC Organic Content, % a little 6 - 15% WD Mt Density, pcf S Percent of Saturation, % some 16 - 30% MC Natural Moisture Content, % SG Specific Gravity and 31 - 50% LL Uquid Limit, % C Cohesion ' PL Plastic Limit, % 0 Angle of Internal Friction PI Plasticity Index, % qu Unconfined Compressive Strength ' DRILLING NOTES: Standard penetration test borings were advanced by 2K" or 3%- I.D. hollow -stem augers unless noted other wise. Jotting water vw used to claw out sugar prior to sampling only whate indicated on logs. Standard penetration test borings are designated by the prefix "ST" (Split Tube). Power sugar borings were advanced by 4" or 6" diameter, con tinuous-fhto. solid stem augers. So,l dessificauon Y' and strata dept.se are inferred from disturbed sornples sugared to the surface and are therefore somewhat approximoee. Power sugar borings are designated by the prefix "B". Hand probings wore advanced manually with a 1 %" diameter probe and an limited to the depth from which the probe can be manually withdrawn. Hand probings we indicated by the prefix "N". ' CLASSIFICATION: Classification on logs is me* by inspection in accordance with the Unified Solis Classification System two attached chart) using viwal-manual procedures unless noted otherwise. GROUND WATER: Observations were me& at the times indicated. Porosity of soil stets, seasonal weather conditions, site topography. etc., may cause changas in the water levels indicated on the logs. SAMPLING: All "I Miles are taken with the standard 2" O. D. split -tube sampler, except where noted. TW indicates thin - . well undisturbed samplle. BPF: Nunsbs. indicate blows par foot recorded in standard penetration test, also known as "N" value The ssmpier is set 6" into undisturbad soil below the hollow -stem ougw. Driving resistances we then counted for second and third 6" increments and added to got BPF. Where they differ significantly, they we reported in the following form - 2/12 for the second and third 6" increments respectively. WH: WN indketes that sensplet psretrated soil under, weight of hammer and rods alone, driving not required. NOTE: All tests run in accordance with applicable ASTM standards. 0mun ENCiNiEERING TESTING