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PUBLIC HEALTH SERVICES COP0�CG <br /> SAN JOAQUIN COUNTY 1< <br /> a <br /> JOGI KHANNA M D.,M.P.N <br /> Health Officer <br /> 4CIFOa� <br /> P.O. Box 2009 0 (1601 East Hazelton Avenue) 0 Stockton, Callfornla 95201 <br /> (209) 468-3400 November 12, 1992 <br /> Colonel James LaBounty <br /> Defense Distribution Region West-Tracy <br /> Building S-1 <br /> P.O. Box 960001 <br /> Stockton, CA 95296.0002 <br /> RE: Letter to Senator Patrick Johnston dated September 14, 1992 <br /> Reference: Summary of DDRW-Tracy Activities <br /> San Joaquin County Public Dealth Services Environmental Ilealth Division (PIIS/EIID) received a copy of <br /> your September 14, 1992,correspondence regarding Defense Distribution Region West-Tracy(DDRW-Tracy). <br /> It is evident that our role and concerns as a local environmental health agency need to be clarified. It also <br /> appears that your knowledge of the chronology of events which prompted the November 20, 1991, PIIS/EIID <br /> letter is limited. <br /> The PDS/E1ID is well aware that DDRW-Tracy is on the National Priority List and is being remedinted under <br /> the Comprehensive Environmental Response Compensation and Liability Act(CERCLA) guidelines;however, <br /> PIIS/EIID is concerned about the public health of Individuals who are being Impacted by the migration of <br /> chemical contaminants In the groundwater. With this in mind, the following facts are provided for your <br /> information: <br /> Sample results of off-site water supply wells (agricultural and domestic), collected and analyzed in <br /> 1987 revealed volatile organic chemical contamination. In correspondence dated July,31, 1991,. <br /> DDRW-Tracy was directed by the,Central Valley Regional Water Quality Control Board (CVRWQCB) <br /> staff to implement expanded sampling to Include these off-site water supply wells. A plan for testing <br /> these wells and replacement of the agricultural water supply wells was to be provided by September <br /> 15, 1991. <br /> PIIS/EIID participation in the site remedintion process is clearly identified in the following <br /> regulations and not a courtesy as expressed in your letter, Section 9620(t) of CERCLA states that <br /> local officials shall be afforded the opportunity to participate in the planning and selection of <br /> remedial actions, Including applicable data,studies, reports and action plans as it becomes available. <br /> Furthermore, Section 25180.7(d) of the California IIealth and Safety Code requires that the local <br /> health officer be notified when water supply contamination has been identified. <br /> PIIS/EIID does not concur that the water In the Rose well is safe to drink. Only one sampling event <br /> Indicated results for trichloroethylene (TCE) which were below the drinking water maximum <br /> contaminant level (MCL) (November 14, 1991). TCE results from the November C,, 1991, and the <br /> recent April-May 1992 sampling were above the MCL. The levels for carbon tetrachloride have <br /> remained above the Calffornfa drinking water MCL in the Rose and Robertson wells. <br /> Title 22 of the California Code of Regulations (CCR), gives the PIIS/EIID responsibility for <br /> surveillance of small public water systems. Small public water systems that are impacted by chemical <br /> contamination above the MCL's are required to be resampled within seven (7) days to confirm the <br /> findings. Notification of the water users Is also a requirement. Private wells are not covered by these <br /> regulations;however, It is our position that these families should be afforded the same public health <br /> consideration. <br /> A DjW.sjm of Can Joaquin County Health Care fences �� <br />