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PUBLIC TUALTH SERVICES <br /> U 1/„ <br /> SO�CSG <br /> SAN JOAQUIN COUNTY r 'a <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Ernest M. Fujimoto, M.D., M.P.H., Acting Health Officer <br /> 445 N. San Joaquin Street • P.O. Box 388 • Stockton, CA 95201-0388 <br /> (209) 468-3420 <br /> CMQODON ROEK Fy <br /> ROEK BROTHERS <br /> 3736 SOUTH HIGHWAY 99 <br /> STOCKTON CA 95213 <br /> RE: 102 S. Wilson Way SITE CODE: 9031 <br /> Stockton, Ca <br /> San Joaquin County Public Health Services, Environmental Health <br /> Division (PHS/EHD) has completed the review of the "Workplan for <br /> Groundwater Investigation" , dated April 18 , 1994 , and submitted <br /> by Kennedy/Jenks Consultants. <br /> The workplan describes the installation of two monitoring wells, <br /> one on the southwestern portion of the site and one directly west <br /> of the northern portion of the site, across the street. These <br /> two additional wells, along with monitoring well MW#6, would <br /> provide data on the groundwater condition on the westernmost <br /> portion of the site and across the street, to the west of the <br /> site. <br /> The stated purpose for the work is to reassess the direction and <br /> gradient of groundwater flow near the western edge of the site <br /> and assess the presence or absence of petroleum hydrocarbon <br /> constituents in the groundwater at a location west of the site. <br /> It appears the scope of work proposed in the workplan would <br /> accomplish the stated purpose. However, the scope of work <br /> proposed in the workplan does not fully address the issues <br /> presented in the PHS/EHD letter to you, dated December 7 , 1992. <br /> In addition, the proposed work would only provide a very limited <br /> amount of data and only for conditions on the most western edge <br /> of the site and across the street to the west. PHS/EHD could not <br /> make any reasonable conclusions from this type of limited data <br /> with regard to the influence of any possible off-site sources on <br /> the site without current on-site data as well. <br /> For this reason, PHS/EHD recommends the replacement of preferably <br /> two, but at least one, more on-site monitoring well(s) . The data <br /> generated from repeatable groundwater samples from the entire <br /> A Division of San joayuin Counn Health Care Service. <br />