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1 <br /> level. The material changed to dark grey moist sand, fine grained <br /> with a very slight hydrocarbon odor at approximately 30 feet where <br /> the boring was terminated. <br /> Boring B-2 , 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 />' was encountered. The next several feet changed from moist fine to <br /> light brown sandy silt with lenses of grayish brown silt several <br /> inches thick at 20 feet. Light brown moist silt found at <br /> approximately 25 feet had a very strong hydrocarbon odor. The soil <br />' changed from moist grayish brown silty sand to moist light grey <br /> clay with no odor to bluish gray moist silty clay with a very <br /> slight hydrocarbon odor at approximately 30 feet where the boring <br />' was terminated. <br /> Boring B-3 , the first foot was sand and gravel fill with <br /> approximately 4 inches of asphalt, then dry light brown silty clay <br />' to approximately 8 feet. From approximately 8 to 25 feet moist <br /> light brown clayey silt to moist fine grained brown silty sand at <br /> approximately 28 feet where the boring was terminated. <br /> The borings were backfilled with cement grout to grade. The <br /> location of the wells and borings are shown in Figure 2 . <br /> Soil samples were collected in the lowest brass liner and were <br /> preserved by covering both ends with Teflon tape and capping with <br /> plastic caps. The soil samples selected for chemical analysis were <br /> labeled, logged under Chain-of-Custody (COC) control, stored in a <br /> cooler with ice and transported to a state certified laboratory <br /> (MCCAMPBELL ANALYTICAL INC. ) for analysis with COC documentation. <br />' Well Development. Measurements and Sampling <br /> On October 25, 1994, John N. Alt and John P. Cummings returned to <br />' the subject site and measured the depth to groundwater in the wells <br /> prior to purging and sampling the wells. A survey of the top of <br /> the well casings relative -to each other was completed to calculate <br /> the gradient for the groundwater at the site. <br /> Well MW-1 was dry. Development of the well by adding water and <br />' surging as well as pumping was carried out for approximately four <br /> hours. <br /> Wells MW-2 and MW-3 were purged and groundwater samples were <br /> 1 collected via clean bailers, placed in 40 ml VOAs and 500 ml <br /> plastic bottles, labeled, placed in a cooled ice chest and <br /> transported to a state certified laboratory (MCCAMPBELL ANALYTICAL <br /> ' INC. ) under COC documentation for analysis. <br /> 7 <br />