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' coarse grained brown sand with thin lenses of small gravel. A <br /> moderate hydrocarbon odor was observed at approximately 25 feet. <br /> The hydrocarbon odors were very strong at 30 feet and strong at 35 <br /> feet. Water was first observed at 33 feet. From 33 feet to <br /> approximately 40 feet, the well bottom, the soil was dark grey sand <br /> with clay lenses grading to moist dark grey clay with a slight <br /> hydrocarbon odor. The boring was terminated at 40 feet to avoid <br /> violating the clay layer. <br /> Twenty feet of 0. 02 inch screened 2-inch-diameter, Schedule 40 PVC <br />' casing was placed at the bottom of well MW-2 . The remainder of the <br /> well was constructed using regular 2-inch-diameter, Schedule 40 PVC <br /> casing. Twenty two feet of #3 Lonestar Sand was used for the <br />' filter pack with a two foot Bentonite seal above the sand. The <br /> remaining portion of the well was filled with cement grout and a <br /> traffic rated moister resistant manhole placed slightly above grade <br /> to avoid surface water contamination. A locking cap with lock was <br /> placed in the casing to avoid inadvertent surface contamination to <br /> groundwater. <br /> For Boring MW-3 , the first foot was sand and gravel fill with <br /> approximately 4 inches of asphalt, then moist brown clayey silt to <br /> approximately 25 feet with some caliche at approximately 20 feet. <br />' From approximately 25 to 33 feet moist graded light brown sand to <br /> fine grained brown sand with very slight hydrocarbon odors <br /> observed. From approximately 33 to 41 feet dark grey clay moist <br /> and plastic with some silty clay and sand at the bottom of the <br /> well. Very slight odors with some organic odors were observed at <br /> the lower end of this boring. The boring was terminated at 41 <br /> feet. <br /> rTwenty feet of 0. 02 inch screened 2-inch-diameter, Schedule 40 PVC <br /> casing was placed at the bottom of well MW-3 . The remainder of the <br />' well was constructed using regular 2-inch-diameter, Schedule 40 PVC <br /> casing. Twenty two feet of #3 Lonestar Sand was used for the <br /> filter pack with a two foot Bentonite seal above the sand. The <br /> remaining portion of the well was filled with cement grout and a <br /> traffic rated moister resistant manhole placed slightly above grade <br /> to avoid surface water contamination. A locking cap with lock was <br /> placed in the casing to avoid inadvertent surface contamination to <br />' groundwater. <br /> Boring Placement <br />' Boring B-1, the first foot was sand and gravel fill with <br /> approximately 4 .inches of asphalt, then moist dark brown clay with <br /> organic matter for the next 4 feet. From approximately 7 to 12 <br />' feet light brown silty clay and clayey sand to fine grained brown <br /> sand. At approximately 12 feet to 18 feet, moist brown clayey silt <br /> with caliche veins was encountered. The next several feet changed <br />' from moist fine to light brown sandy silt with clay being moist at <br /> approximately 25 feet no hydrocarbon odor was observed to this <br /> 6 <br />