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LEEDSHILL-HERKENHOFF, INC. <br /> 303 Second Street,Suite 880 North <br /> San Francisco, California 94107 <br /> 4t51243.9980 <br /> January 16, 1990 SUBJECT TO ATTORNEY/CLIENT PRIVILEGE <br /> CONTAINS ATTORNEY WORK PRODUCT <br /> Ms. Jeanne M. Zolezzi <br /> Neumiller and Beardslee <br /> P.O. Drawer 20 <br /> Stockton, CA 95201-9978 <br /> Subject: Conrady, M ajorie/Foreclosure (1235 Alpine Road) <br /> File No. 15380-13889 <br /> Dear Ms. Zolezzi: <br /> As discussed at our January 8, 1990 meeting, LEEDSHILL-HERKENHOFF, INC. (LH) is <br /> pleased to re-submit our cost proposal to perform a preliminary site assessment of the <br /> former gasoline service station property located at 1235 East Alpine Road in Stockton. <br /> The results of this investigation will provide information regarding the presence or absence <br /> of gasoline constituents in the groundwater, and an indication of the vertical and horizontal <br /> extent of suspected soil contamination. This letter outlines the tasks that will be <br /> performed and the estimated costs associated with the work. The following tasks will be <br /> performed: <br /> Phase I -- BASIC SERVICES <br /> Task 1: Site Investigation <br /> LH will submit a permit application with the Public Health Services San Joaquin <br /> County to conduct the work described below. It is proposed to drill two 30-foot <br /> boreholes (60 feet total) in ..the area of the suspected leaking 10,000-gallon <br /> unleaded gasoline tank, to determine vertical and provide an indication of the <br /> horizontal extent of suspected soil contamination. Soil samples will be collected <br /> at 5-foot intervals from the boreholes and sent to an approved laboratory for <br /> testing. <br /> Depth to groundwater in this area is estimated to be approximately 45 feet. LH <br /> recommends that three small diameter monitoring wells be installed to establish the <br /> direction and gradient of groundwater flow at the site and to establish whether or <br /> not groundwater contamination exists. Each well will be approximately 60 feet <br /> deep. After development of the well, a representative groundwater sample will be <br /> collected for laboratory testing. <br /> Soil cuttings and water generated during drilling and well development will be <br /> containerized on site, awaiting ultimate disposal by the property owner. <br /> SAN FRANCISCO • SAN DIEGO • DENVER 9 ALBUQUERQUE • SANTA FE • PHOENIX <br />