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0 <br /> PUBLIC HEALTH SERVIC S OpQUI <br /> SAN JOAQUIN COUNTY Q <br /> N: } <br /> ENVIRONMENTAL HEALTH DIVISION 3 <br /> Karen Furst, M.D., M.P.H., Health Officer �i.FoR�:P <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202 <br /> 209/468-3420 r <br /> PETER J NIEMIEC ESQ MAR 1 3 �1y <br /> UNOCAL CORPORATION <br /> 376 S VALENCIA AVE <br /> BREA CA 92823 <br /> RE: UNOCAL#6981 <br /> SITE CODE: 1217123 <br /> 4707 Pacific Ave. <br /> Stockton, CA <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) has <br /> reviewed the"Addendum to Work Plan For Soil Boring and Monitoring Well Installation at Tosco <br /> (Former Unocal) Station#6981, 4707 Pacific Avenue, Stockton, CA" dated February 17, 1999, <br /> prepared by Gettler-Ryan Inc. It is an addendum to a work plan dated September 12, 1997, for <br /> the above referenced site. <br /> It is stated in the addendum that"soil and groundwater samples will be collected and analyzed as <br /> described in the original GSI Work Plan". That work plan states that a minimum of 3 soil samples <br /> above groundwater will be analyzed for contaminants. Please be advised that soil samples <br /> should be collected and analyzed above and below groundwater. Also a sufficient number of <br /> samples should be analyzed to confirm contaminant definition and to calculate any contaminant <br /> mass remaining. <br /> In addition, to the laboratory analyses proposed in the September 12, 1997, work plan, analysis <br /> for MTBE, DIPE, TAME, ETBE, and TBA using EPA Method 8260 should be conducted. <br /> With the inclusion of the above comments to the work to be performed the work plan and <br /> addendum are approved. Please submit well permit applications (one for the on site drilling and <br /> one for the off site drilling), a copy of the encroachment permit from the City of Stockton for the off <br /> site drilling, and two $89 permit fees. After the permits have been issued, the work can be <br /> scheduled. Please notify PHS/EHD staff 48 hours prior to performing any work, so they can be <br /> present to witness it. <br /> If you have any questions contact me at(209)468-3449. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> Margaret L7aagoriio`, Supervising Rg RE`HSS <br /> Site Mitigation Unit U <br /> c: SJCADA-David Irey <br /> SWRCB -Jim Munch <br /> TOSCO-Ed Ralston <br /> Gettler Ryan -Stephen Carter <br /> CVRWQCB-Mark List <br /> Dayton Hudson Corp-Dave Luick <br /> A Division of San Joaquin County Health Care Services <br />