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PUBLIC 11EALTH SERViTES }4urnr <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Ernest M. Fujimoto, M.D., M.P.H., Acting Health Officer <br /> 4Ci k o a�� <br /> 445 N. San Joaquin Street • P.O. Box 388 0 Stockton, CA 95201-0388 <br /> (209) 468-3420 <br /> JIM GIOTTONINI C:(Dpy <br /> PUBLIC WORKS DIRECTOR <br /> CITY OF STOCKTON <br /> 425 NORTH EL DORADO 00T 19 <br /> STOCKTON CA 95202 <br /> RE: Victory Park Site Code: 2591 <br /> Argonne and Picardy <br /> Stockton CA 95203 <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) has completed review of <br /> the Twining Laboratories' "Work Plan for Groundwater Monitoring Well Installation" which was received on <br /> September 21, 1994. PHS/EHD has prepared the following comments for your consideration. <br /> The work plan proposed to install three monitoring wells to investigate the possibility that the groundwater has been <br /> impacted by petroleum hydrocarbon contamination which has been evidenced in the soil. Three soil borings were <br /> proposed to be drilled to approximately 40 feet below ground surface, sampled every five feet below the 20' depth <br /> and converted into two-inch diameter monitoring wells. PHS/EHD recommends that monitoring wells drilled outside <br /> of the backfilled area undergo soil sampling at five foot intervals beginning at the five foot depth for lithological <br /> description. The work plan indicated that two soil samples would be collected during the installation of the <br /> monitoring wells laboratory analysis. Please be aware that sufficient soil samples should be collected for laboratory <br /> analysis to adequately characterize the vertical and horizontal extent of soil contamination. <br /> The work plan failed to include an investigation of the residual soil contamination which was evidenced on the south <br /> wall of the excavation. Please submit an addendum to investigate the residual soil contamination. PHS/EHD will <br /> issue the drilling permit once the addendum has be received, reviewed and approved. <br /> Also, please be aware that PHS/EHD oversight of field activities is not limited to grouting inspections and charges <br /> incurred during inspections are billed quarterly by the State Water Resources Control Board. <br /> If you have any questions and comments, please contact Mary Meays at (209) 468-0337. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> 04 <br /> Mary Meat's, S for S Diane .*Hinson, REHS <br /> Site Mitigation Unit Supervisor <br /> MM/ARG.PIC <br /> cc: Elizabeth Thayer, CVRWQCB <br /> cc: John Fukomoto, City of Stockton Public Works Department <br /> cc: Kevin Clutter, Twinning Laboratory <br /> A 1)n isiun or S•rn.Joaquin C'uUnty Health care Servicer <br />