2008-11-26_PERMIT FILE - M2008080 (10)

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GENERAL NOTES DRILLING & SAMPLING SYMBOLS: SS:. Split Spoon -1 $/8" I.D.; 2" O.D., unless otherwise noted HS: Hollow Stem Auger ST: Thin-Walled Tube - 2° O.D., unless otherwise noted PA: Power Auger RS: Ring Sampler - 2.42" I.D., 3" Q.D., unless otherwise noted HA- Hand Auger DB: Diamond Bit Coring - 4", N, B RB: Rock Bit BS: Bulk Sample or Auger Sample WB: Wash Boring or Mud Rotary The number of blows required to advance a standard 2-Inch O.D. sprit spoon sampler (SS) the last 12 inches of the total 18-inch penetration with a 140-pound hammer falling 30 inches is considered the 'Standard Penetration' or'N-value'. WATER LEVEL MEASUREMENT SYMBOLS: WL: Water Level WS: While Sampling N/E: Not Encountered WCI: Wet Cave in WD: While Drilling DCI: Dry Cave in BCR: Before Casing Removal AB: After Boring ACR. After Casing Removal Water levels indicated on the boring logs are the levels measured in the borings at the times indicated. Groundwater levels at other times and other locations across the site could vary. In pervious soils, the Indicated levels may reflect the location of groundwater. In low permeability soils, the accurate determination of groundwater levels may not be possible with only short4erm observations: DESCRIPTIVE SOIL CLASSIFICATION: Soil classification is based on the Unified Classification System. Coarse Grained. Soils have. more than 50% of their dry weight retained on a #200 sieve; their principal descriptors are: boulders, cobbles, gravel or sand. Fine Grained Soils have less than 50% of their dry weight retained on a #200 sieve; they are principally -described as clays If they are plastic, and silts if they are slightly plastic or non-plastic. Major constituents may be added as modifiers and minor constituents may be added according to the relative proportions based on grain size. In addition to gradation, coansagralned soils are defined on the basis of their irvoace relative density and fine-grained soils on the basis of their consistency. CONSISTENCY OF FINE-GRAIN Standard Unconfined Penetration or Compressive N-value (SSI %renath. Qu. Mf woslFt Consistenov < 500 <2 Very Soft Soo- 1;000 2-3 Soft 1,001 -- 2,000 48 -Medium Stiff 2,001 - •4,000 7-12 Stiff 4,001 - 8,000 13-26 Very Stiff 8,000+ 26+ Hard RELATIVE DENSITY OF COARSE-GRAINED SOILS Standard Penetration or N-value (S$) Bio l t 0-3 4-9 10-29 30 - 49 50+ Relative Density Very Loose Loose Medium Dense. Dense Very Dense RELATIVE PROPORTIONS OF SAND AND GRAVEL GRAIN SIZE TERMINOLOGY Descriptive Term(s) of other Percent of Major Component cons ents Dry Wel aht of Sample Particle Size Trace < 15 Boulders Over 12 In. (300mm) With 15-29 Cobbles 12 in. to 3 In. (300mm to 75 mm) Modifier > 30 Gravel 3 in. to #4 sieve (75mm to 4.75 mm) Sand #4 to #200 sieve (4.75mm to 0.076mm) RELATIVE PROPORTIONS OF FINES SIR or Clay Passing 9200 Sieve (0.075mm) Descriptive Town(s) of other Percent of PLASTICITY DESCRIPTION constituents Dry Wei Sht Tenn Plasticity Indox Trace < 5 Non-plastic 0 With 5-12 Low 1-10 Modifiers > 12 Medium 11-30 High 30+ 1rerracon-