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i <br /> URS Greiner Woodward Clyde 2520 Venture Oaks Way,Suite 250 <br /> A Division of URS Corporation pp �+ Sacramento,CA 95833-3200 <br /> Tel:916,929.2346 <br /> Fax:916 929.7263 <br /> r <br /> Offices Worldwide <br /> March 13, 2000 <br /> Ms. Carol Oz <br /> San Joaquin County-Public Health Services <br /> Environmental Health Division <br /> 304 East Weber Avenue,Third Floor <br /> Stockton, California 95201-0388 <br /> Reference: Workplan for Environmental Services at the California Highway Patrol Facility Located <br /> at 3330 North Ad Art Road in Stockton California <br /> RESD Work Order No. CHP702 <br /> URSGWC Project No.41-03014214-03 <br /> f <br /> Dear Ms. Oz: . <br /> URS Greiner Woodward Clyde,Inc. (URSGWC)is pleased to present this workplan for a soil and groundwater <br /> investigation at the California Highway Patrol (CHP) facility located at 3330 North Ad Art Road in Stockton, <br /> t California (Site). This workplan has been prepared on behalf of the State of California—Real Estate Services <br /> Division under Contract No. 3014214. The following.pages present the background and proposed scope of work. <br /> BACKGROUND <br /> A single-walled gasoline fuel underground storage tank(UST) is located at the Site. A soil investigation was <br /> conducted by Alton Geosciences in March 1999 to comply with UST upgrading requirements. The investigation <br /> included drilling and sampling four soil.borings. The borings:were-extended to approximately 25 feet below <br /> ground surface(bgs). One soil sample was collected at 25 feet bgs from each boring and submitted for laboratory <br /> analyses of total petroleum hydrocarbons as gasoline (TPH-G); benzene, toluene, ethylbenzene, and xylenes <br /> (BTEX); and methyl tertiary butyl ether(MTBE). The analytical results reported concentrations of MTBE in two <br /> soil samples(B2 and B4)at concentrations of 0.008 and 0.007 milligrams per kilogram. TPH-G and BTEX were <br /> not detected in any of the four samples. Based on these analytical results,the San Joaquin County Environmental <br /> Health Division(SJCEHD)requested that a soil and groundwater investigation be conducted at the Site. <br /> SCOPE OF WORK <br /> URSGWC is proposing the installation of four•borings at the Site to assess the lateral and vertical extent of soil <br /> contamination and the presence or absence of groundwater contamination. This workplan includes discussion of <br /> permitting, drilling and sample collection, and report preparation. A copy of the URSGWC Health and Safety <br /> plan will be present on-site during the drilling and sampling activities. <br /> Permitting <br /> SJCEHD requires that permits be obtained prior to the installation of soil borings. URSGWC will submit the <br /> appropriate permit application with fees to the SJCEHD prior to conducting field activities. <br /> 1:114214103_Stockton\W orkplan.doc <br />