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te � � , <br /> PUW�IC HEAETH SE?VICES <br /> SAN JOAQUIN COUNTY <br /> Y Q <br /> JOGI KHANNA M.D.,M.P.H. <br /> Health Officer , ,P <br /> P.O. Box 2009 • (1601 East Hazelton Avenue) Stockton, California 95201 <br /> (209) 468-3400 <br /> October 15, 1990 <br /> Vukelch <br /> Nancy . <br /> Chevron U.S.A. , Inc. <br /> P.O. box 500'4 <br /> San Ramon, CA 94583 <br /> RE: Chevron U. S.A. IN REPLY REFER TO SITE CODE: 2019 <br /> 3246 E.° Fremont St. <br /> Stockton, CA <br /> Our review of your Problem` Assessment Report dated September 18, <br /> 1990 is complete. . We have the following comments: <br /> 1. Collect water samples on a quarterly basis and provide us <br /> with a written quarterly ,'`report. <br /> 2 . Install a third monitoring well screened in the same <br /> aquifer zone as �. EA-5 :and EA--6 in order to determine <br /> groundwater gradient. :Submit a work pian. for this well <br /> by November 5k, 1990. <br /> 3 . Advise us on the disposition of the four dry monitoring <br /> wells - MW #1„ MW #2 , MWi�#3 and MW #4. <br /> 4 . Inform us as to the disposition of the stockpiled soils <br /> ,arid containerized water' generated during the construction <br /> f and sampling "bf EA-5 and 'EA--6. <br /> 5. Sample EA-6 for fecal coliform during the- next round of <br /> sampling, <br /> 6. The detection, limits previously used for soil and water <br /> .sampling were not in compliance with the +LUFT Manual. In <br /> the future use the- detection limits listed in the LUFT. <br /> 'Manual for sampling. <br /> 7. End caps on brass tubes for soil samples were not being <br /> taped as required in the LUFT Manual: Proper. sample <br /> collection procedures, as listed in the LUFT Manual, <br /> ..should be followed. <br /> F <br /> A Division of San Joaquin County Health Care Services <br />