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r <br /> t <br /> TUBLIC . EALTH SERVI_tj_.�oa��UrN <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION °0 '` <br /> Ernest M. Fujimoto, M.D., M.P.H., Acting Health Officer <br /> 445 N.,San Joaquin Stere# • P.O. Box 388 • Stockton, CA 95201-0388 <br /> (209) 468-3420 <br /> ERIC JOHNSON <br /> TECHNICAL AND ECOLOGICAL SERVICES <br /> 3400 CROW CANYON RD AN, a 8 <br /> SAN RAMON CA .94583 <br /> RE: PG&E Tracy Service Center SITE CODE: 1407 <br /> 502 East Grant Line Road <br /> Tracy, CA <br /> San Joaquin County Public Health Services Environmental Health Division(PHS/EHD)has reviewed the first semi- <br /> annual groundwater monitoring report of 1994 submitted by RESNA for the above referenced site. <br /> Results of sampling indicate the gradient to be northerly.The only downgradient well showing contamination is OW- <br /> 2. The Ievel of contamination in OW-2 has been declining since it was installed in April of 1989. The remaining:j i <br /> four downgradient wells and one upgradient well have never had any detectable amounts of BTEX TPHg or Pb since <br /> they were installed in April of 1989. <br /> California Code of Regulations Title 23, Division 3, Chapter 16 (Underground Storage Tank Regulations) Section;# <br /> 2652(d) requires quarterly reports be submitted to PHS/EHD and the Regional Water Quality Control Board until <br /> the investigation and cleanup of the site are complete. Submission of these reports is to begin immediately. OW-2 <br /> should be sampled quarterly and all wells should be measured quarterly. Sampling OW-1, OW-4, OW-5, OW-6 <br /> twice a year and OW-3 once a year is acceptable at this time. <br /> If OW-2 continues to evidence contaminants active remediation may be required by PHS/EHD. . <br /> Please provide PHS/EHD staff notice 48 hours prior to sampling or other activities so they may witness the activity. <br /> If you have any questions, contact Steven Sasson at (209) 468-3459. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> Steven Sasson, Senior REHS Diane M. Hinson, REHS <br /> Site Mitigation Unit Supervisor <br /> SS:lb <br /> { <br /> A IN%ihion of San Joaquin County Health Care Service~ <br /> F <br />