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t <br />Background Information: Windeler Ranch Glass Disposal <br />Page 2 of 2 <br />PREVIOUS SITE ASSESSMENT AND SAMPLING <br />On 12 December 2007, twenty-six potholes were excavated in the estimated outlying area of the <br />former glass disposal site. The potholes were excavated utilizing an excavator, to depths between <br />3.5 and 8.5 feet below surface grade (bsg). The actual area of the glass disposal site was determined <br />to be approximately 180, 500 square feet. <br />Soil samples were collected from six of the twenty six potholes, as directed by the EHD, from depths <br />between 3.5 feet and 7 feet bsg. <br />• Total petroleum hydrocarbons as diesel (TPH-d) was reported in two of the soil samples, at <br />concentrations of 1,200 milligrams per kilogram (mg/kg: 5-2802) and 610 mg/kg (5-2805). <br />• Barium was detected in all six soil samples, at a maximum concentration of 210 mg/kg (S - <br />2800A). <br />• Zinc was detected in five of the six samples, at a maximum concentration of 21 mg/kg (S- <br />2800). <br />• Chromium and vanadium was detected in three of the six soil samples, at maximum <br />concentrations of 9.9 mg/kg (5-2800) and 19 mg/kg (5-2800), respectively. <br />• Copper was detected in two of the six soil samples, at a maximum concentration of 52 mg/kg <br />(5-2800A). <br />• Lead was detected in one of the six soil samples, at a concentration of 53 mg/kg (5-2800A). <br />A summary of analytical results is included in Tables Al and A2. Complete results, including <br />laboratory reports, were included in the AGE -prepared Glass Limits Soil Excavation Report, dated <br />07 March 2008. <br />Advanced GeoEnvironmental, Inc. <br />