1977-12-09 Septic System Design Report

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PARTICLE SIZE IDENTIFICATION DESCRIPTIVE TERMINOLOGY SOIL INTRUSIONS Bouldm Grovel Co•reo Modtum Fine Send Corte Mad um Fine Very Fine Silt Cloy over 3" 1, — 3" 1 /2" — 1' No. 4 — 1 /2" No. 4 — No. 10 No. 10 — No. 40 No. 40 — No. 100 No. 100 — No. 200 No. 200 — .005 mm lop then Am mm RELATIVE DENSITY OF COHESION LESS SOILS THICKNESS Ions@ 0 — 1 /B" seem 1 /B" — 1' layer 1" — 12" verved alternating seems or lenses of clays and silts in lake deposit MOISTURE CONTENT RELATIVE PROPORTIONS with a few 0 — 10% with some 11 —20% with over 20% ORGANIC CONTENT Dry loss then 5% 0-5% non to slightly organic Moist under optimum moisture 6 — 10% slightly organic Wet over optimum moistwo 11 — 25% organic Waterbaring saturated and 26 — 65% muck 65+ post CONSISTENCY OF PLASTICITY OF SOILS WITH COHESIVE SOILS LESS THAN 20% CLAY very loose 0 — 4 BPF very soh 0 — 1 BPF qon plastic gritty, cannot thread tam 5 — 10 BPF soft 2 — 3 BPF slightly plastic rough to smooth, modium dense 11 — 30 BPF rather soft 4— 5 BPF hard to thread d- 31 — 50 SPF medium 6— B BPF plastic smooth to waxy, wry dense 50+ BPF rethw stiff 9 — 12 BPF easy to thread stiff 13 — 16 BPF very stiff 17 — 30 BPF hard 3D+ BPF RELATIVE PROPORTIONS OF GRAVEL LABORATORY TESTS • t►om 0 — 5% DD Dry Density, pcI OC organic Content, % a little 6 — 15% WD Vbt Density, pcf S Percent of Saturation, % some 16 — 30% MC Natural Moisture Content, % SG Specific Gravity end 31 — 50% LL Liquid Limit, % C Cohesion PL Plastic Limit, % B Angle of Internal Friction PI Plasticity Index, % qu Unconfined Compressive Strength DRILLING NOTES: Standard panetration test borings were advanced by 2X" or 3%" I.D. hollow -stem augers unless noted other wise. Jetting water sues used 10 clean out sugar prior to sampling only where indicated on logs. Standard penetration test borings are designated by the prefix "ST" (Split Tube). Power auger borings ware advanced by 4" or 6" diameter, continuous flits, solid stem augurs. Soil classification and strata depths we inferred from disturbed samples sugared to the surface and are therefore somewhat approximess. Power sugar borings are designated by the Prefix "B". Hand probings were advanced manually with a 1'A" diameter probe and are limited to the dep+h from which the Probe can be manually withdrawn. Hand probinge we indicated by the Prefix "H". CLASSIFICATION: Classification on logs is made 121, inspection in accordance with the Unified Sods Classification System Ise@ attached chart) using visual -manual procedures unless noted otherwise. GROUND WATER: Observations veers or" at the times indicated. Porosity of soil strata, seasonal weather conditions, site topography, etc., may cause changes in the water levels indicated on the Icgs. SAMPLING: All sarrsples are to& with the standard 2" O. D. split -tub serspier, except where noted. TW indicates thin - wall undisturbed s: BPF: Number indicate bfuvvs per foot recorded in standard penetration test, also known as "N" value The sampler is set 6" Into undisturbed soil blow the hollow -stem auger. Driving resistances are then counted for second and third 6" increments and added to gat BPF. Where they differ significantly, they are reported in the following form — 2112 for tho second and third 6" increments respectively. WH: WH indicates that sems{•ler penetrated soil under weight of hammer and rode alone, driving not required NOTE: All tests run in accordance with applicable ASTM standards. 0mun, ENGINEERING TESTING