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PUBLIC H15ALTH SERVICES <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Karen Furst, M.D., M.P.H., Health Officer <br /> 304 East Weber Avenue, Third Floor Stockton, CA 95202 c . P <br /> QLrFORN <br /> 209/468-3420 <br /> MICHAEL TURBETTI / JAN THOMPSON Ll <br /> WILBUR ELLIS COMPANY L <br /> 191 W SHAW AVE SUITE 107 <br /> FRESNO CA 923704-2876 MAR 2 2 2000 <br /> RE: Former Underground Tank SITE CODE:507797 <br /> 212 Industrial Drive <br /> Stockton,CA.,95206 <br /> San Joaquin County Public Health.Services,Environmental Health Division (PHS-Elhas reviewed the"Fourth <br /> Quarter 1999 Groundwater Monitoring Report" dated February 22,2000 submitted by Krazan&Associates Inc.,and <br /> has the following comments. <br /> The groundwater petroleum plume at this site has been monitored for five (5)consecutive quarters now and the <br /> groundwater gradient direction and depth to first groundwater have been consistent. Petroleum contamination in the <br /> groundwater samples indicates that all three(3)monitoring wells have levels of Benzene that exceed the Maximum <br /> Contaminant Level (MCL). Further groundwater investigation in the northwest quadrant of the site is still <br /> required by PHS-EHD,as noted in correspondence dated December 10,1998. <br /> In this correspondence,PHS-EHD advised that your consultant's conclusion that "thse fr�s may su&est an of-sitesourre <br /> for BMZ6W9roundr a&rmrtlanmaaticn"needed a more complete investigation and the possibility of onsite spills from <br /> temporary storage of railroad equipment is to be verified. A well search and sensitive receptor survey should also be <br /> included in the next phase of investigation. <br /> Your request to reduce quarterly sampling to semi-annual and to discontinue analysis for the fuel oxygenates,methanol, <br /> and ethanol is approved at this time. Please be advised,future installation of additional monitoring wells or soil borings <br /> (with or without groundwater analyses)must include the oxygenates and alcohols. <br /> In preparation for a request for"No Further Action" (NFA),sites are to have the complete laboratory analyses(8015m, <br /> 8020,and 8260 or 8260B,now approved for all three) for all monitoring wells for the last two consecutive quarters prior <br /> to the request. In addition,sites preparing for NFA should complete the checklist items listed in Appendix B closure <br /> document faxed to you on December 9, 1999. If information for all of the items on the checklist cannot be supplied <br /> because of lack of data,a work plan to obtain the data should be submitted to PHS-EHD. <br /> The work plan required for the northwest subsurface investigation and well survey should be submitted by April 28, <br /> 2000. A well permit application form and the$89 permit fee (per parcel),a site specific safety plan,and any access <br /> agreements should be included with the work plan. <br /> Donna Heran,RENS,Director <br /> Enviro ental Health Division <br /> '5-1) <br /> Michael J.Infurna Jr.,Senior S Margaret Yaganio,REHS <br /> LOP/Site Mitigation Unit IV Supervisor <br /> MI/ <br /> c: CVRWQCB-Marty Hartzell,Sacramento. <br /> c: SWRCB-CUF-Wennilyn Fua,Sacramento. <br /> c: Krazan-Jeffrey A Noel,215 W.Dakota,Clovis,CA.93612. <br /> A Division of San Joaquin County Health Care Services <br />