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1.0 INTRODUCTION <br /> u.r <br /> Environmental Science & Engineering, Inc. (ESE) has prepared this Work Plan on behalf <br /> of AT&T Communications (AT&T) to describe the methods of investigation for assessing <br /> possible soil contamination at the AT&T Microwave Station (site) located at 110 West <br /> Turner Road, Lodi, San Joaquin County,California(Figure 1). The investigation is being <br /> performed in response to a letter request from San Joaquin County Department of Public <br /> Health Services,Environmental Health Division(San Joaquin County Health Department), <br /> dated June 26, 1990. ESE has prepared the Work Pian in accordance with the California <br /> S-1 <br /> Central Valley Regional Water Quality Control Board(Regional Board)recommendations <br /> for initial evaluation and investigation of underground tanks(Regional Board, 1989). The <br /> Work Plan is submitted for review by San Joaquin County Health Department and by the <br /> Regional Board. <br /> ` 2.0 SCOPE OF WORK <br /> 2.1 Objective <br /> The objective of the Work Plan is to establish the concentration of petroleum hydrocarbons <br /> that may remain in the subsurface soil and ground water of the site in the vicinity of the <br /> former excavation undertaken by AT&T in 1987 to remove underground fuel storage tanks. <br /> According to the letter request from San Joaquin County Health Department (1990), <br /> hydrocarbons are presumed to remain in the soil at about 18 feet, the approximate depth <br /> limit of the former excavation. The letter request also implies that petroleum,hydrocarbons <br /> may be present in ground water. <br />