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PUBLIC AALTH SERVAES oPa�,N P <br /> SAN JOAQUIN COUNTY r. a <br /> ENVIRONMENTAL HEALTH DIVISION ` <br /> Karen Furst, M.D., M.P.H., Health Officer " <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 9520 <br /> 209/468-3420 <br /> NOV 191997 <br /> RICHARD BOKIDES <br /> 6421 W CAPITOL AVE <br /> LODI CA 95242 <br /> RE: Flag City Chevron SITE CODE: 1706 <br /> 6421 W. Capitol/Paddock Place <br /> Lodi, CA., 95242 <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS-EHD) has reviewed <br /> the recently submitted Quarterly Monitoring Report and report of the recent deep"Geoprobe" <br /> investigation and offers the following comments. <br /> Concentrations of MTBE found in the groundwater exceed allowable limits and must be investigated <br /> further. Monitoring wells should be placed in all areas where this and other fuel additives have been <br /> detected. The wells should be constructed so that a deep screened interval is placed at the geological <br /> segment where the contamination was detected. A separate monitoring well or additional casing <br /> should be placed at the current depth to groundwater also with a screened interval not to exceed <br /> twenty feet long. PHS-EHD recommends that no more than five feet of screened interval be placed at <br /> the deeper zones and the wells may be"nested"if your consultant feels this would be more <br /> economical than multiple wells place in a close"clustered"manner. <br /> A work plan that addresses the construction, number, and location of these wells should be <br /> submitted by January 20, 1998. <br /> In order to place offsite monitoring wells, either a signed access agreement from the private property <br /> owner or an encroachment permit from a public agency is needed. Please include a copy of the <br /> required approval with a PHS-EHD boring permit application and the$89 fee per permit per parcel. <br /> Please continue to monitor and sample the existing monitoring wells quartedy for TPH-G and D, <br /> BTEX, and the oxygenates until redirected by PHS-EHD. <br /> You may contact Michael Infuma at(209)468-3454 if you have any questions or wish to discuss the <br /> site. <br /> Donna Heran, REHS, Director <br /> Envir nme/ntal Health Division <br /> 4;� A <br /> LGcr�C �_ y <br /> Michael J. Infuma Jr., Senior REHS Margare` REHS Q <br /> LOP/Site Mitigation Unit IV Supervisor <br /> MI/ <br /> c: Pat Anderson-CVRWQCB, Sacramento <br /> c: Tim Cuellar-AGE, 4405 N.Wilson Way, Stockton, 95205 <br /> A Division of San Joaquin County Health Care Services <br />