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LOG KEY <br /> ABBREVIATIONS AND NOTES <br /> ARCH =— Air Rotary Casing Hammer <br /> BOH — Bottom Of Hole during Hydropunch sampling <br /> Ctgs -- Cuttings sample for lithologic logging <br /> L DTW =— Depth To Water <br /> NM — Not Measured <br /> SS -- Splitspoon sample for lithologic logging <br /> < -- Concentration less than detectable level as indicated <br /> GRAPHIC SYMBOLS <br /> Ground surface <br /> Bentonite/cement grout <br /> Blank casing <br /> Bentonite seal <br /> Well screen <br /> Artificial filter pack (sand) <br /> Bottom cap <br /> Bottom of boring <br /> Sample interval submitted for potential analysis <br /> Contacts — Angled where approximate <br /> L OR <br /> ---- — Dashed where gradational <br /> Hydropunch screen interval <br /> LQ Groundwater elevation encountered during drilling <br /> Z Static groundwater elevation <br /> USCS NOMENCLATURE <br /> GW Well graded gravels, gravel sand mixtures. <br /> GP Poorly graded gravels or gravel sand mixtures. <br /> GM Silty gravels, gravel sand silt mixtures. <br /> GC Clayey gravels, gravel sand clay mixtures. <br /> SW Well graded sands, gravelly sands. <br /> SP Poorly graded sands or gravelly sands. <br /> SM Silty sands, sand silt mixtures. <br /> SC Clayey sands, sand clay mixtures. <br /> ML Inorganic silts and very fine sands. <br /> CL Inorganic clays <br /> OL Organic silts and organic silty clays. 3 <br /> MH Inorganic silts, micaceous or diatomaceous fine sandy or silty soils. <br /> CH Inorganic clays or high elasticity. <br /> OH Organic clays of medium to high elasticity, organic silts. <br /> LPT Peat and other highly organic soils. <br /> Y <br /> M <br /> V <br />