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PUBLIC i1EALTH SER�*TCES <br /> SAN JOAQUIN COUNTY =' °i <br /> ENVIRONMENTAL HEALTH DIVISION <br /> N: < <br /> Ernest M. Fujimoto, M. D., M.P.H., Acting Health Officer <br /> 304 E. Weber Ave., Third Floor • P. O. Box 388 • Stockton, CA 95201-0388 "6.Fo.a; P <br /> 209/468-3420 <br /> COMDYF <br /> KEN GILLIES MALED FEB 0 61996 <br /> GILLIES TRUCKING INC <br /> P O BOX 8303 <br /> STOCKTON CA 95208 <br /> RE: Gillies Trucking SITE CODE: 1703 <br /> 3931 Newton Road <br /> Stockton, CA 95205 <br /> San Joaquin County Public Health Services, Environmental Health Division <br /> (PHS/EHD) has reviewed the September 21, 1995 report prepared by Upgradient <br /> Environmental Consultants for the above referenced site. <br /> The current depth to groundwater measurements indicate that the top of screen in the <br /> three wells is submerged below groundwater. Title 23, Division 3, Chapter 16, Article <br /> 4, Section 2649 (d)(2) of the California Code of Regulations (CCR) states <br /> "Groundwater monitoring well casings shall extend to the bottom of the boring and <br /> shall be factory-perforated from a point of one foot above the bottom of the casing to <br /> an elevation which is either five feet above the highest anticipated groundwater or to <br /> within three feet of the bottom of the surface seal or to the ground surface whichever <br /> is the lowest elevation." PHS/EHD requires that the monitoring wells comply with <br /> CCR Section 2649. The wells also appear to be within the plume, and accurate <br /> gradient information is not available due to the placement of the wells on the same <br /> gradient contour line. <br /> In a letter dated August 1, 1995, PHS/EHD recommended that you install additional <br /> wells to characterize the up gradient and the down gradient extent of the hydrocarbon <br /> groundwater plume, and that the newly installed wells comply with CCR Section <br /> 2649. In the same letter, you were directed to submit an interim workplan to define <br /> the extent of the residual soil contamination remaining after the overexcavation <br /> completed in July 1990. The workplan was to be implemented by September 15, <br /> 1995. To date the scope of work requested in the August 1, 1995 letter has not been <br /> implemented. <br /> A Division of San foaquin County Health Care Services <br />