ARCHIVED REPORTS_XR0004423 - Laserfiche WebLink

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Working To Restore Nature i 3164 Gold Camp Drive Rancho Cordova, CA 95670 Phone (916)852-6690 Fax (916) 852-6688 September 28, 1992 Mr Kenneth R Earnest UItramar Inc 525 West Third Street Hanford, California 93230 Subject Ground-Water Sampling, July 1992, at Beacon Service Station No 492, 470 North Main Street, Manteca, California Mr Earnest This report presents the results of the second quarter 1992 ground-water sampling that RESNA Industries (RESNA) conducted at the request of Ultramar Inc at the subject site (see the Site Vicinity Map, Plate 1) The purpose of this sampling program is to monitor the concentrations of hydrocarbons in ground water at the site Work included measuring depths to water, sampling ground water for subjective and laboratory analyses of hydrocarbons, and evaluating the ground-water gradient beneath the site The locations of the monitoring wells are shown on the Generalized Site Plan, Plate 2 Present Ground-Water Sam lin On July 13, 1992, a technician from RESNA conducted the second quarter 1992 monitoring event at the site following methods summarized in an attachment to this letter report Depth-to-water levels were measured in each of the the monitoring wells (see Table 1) RESNA then collected ground-water samples from each monitoring well and examined the samples for floating product, sheen, and other subjective evidence of hydrocarbons No subjective evidence of hydrocarbons was observed in any of the samples collected from the monitoring wells (see Table 2) Water was purged from the wells and was placed in 55- gallon drums approved for this use by the Department of Transportation and stored temporarily at the site pending removal by Ultramar Inc The technician then collected ground-water samples from each monitoring well for laboratory analyses � 86102-8