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i <br /> r <br /> STATE Of CALIFORNIA—HEALTH AND WELFARE AvENCY <br /> GEORGE DEUKMEJIAN, Goror <br /> DEPARTMENT OF HEALTH SERVICES <br /> TOXIC SUBSTANCES CONTROL DIV ISI ON <br /> NORTHERN CALIFORNIA SECTION <br /> 4250 ROWER INN ROAD ,January 13, 1988 <br /> SACRAMENTO, CA 95826 <br /> (916)739-3145 <br /> Mrs. Sheridan Randolph <br /> Chief Executive officer <br /> Acme-Stockton Galvanizing Company <br /> 3564 Gresham Court <br /> Pleasanton, CA 94566 <br /> Dear Mrs. Randolph: Y� <br /> RESPONSE TO LETTERS OF DECEMBER 4 AND 22, 1987 <br /> In response to the letter from Hydrotech Consultants of 4 <br /> December 1987 , The Department of Health Services (DHS) agrees <br /> that there is no reason to duplicate previous studies by McKesson <br /> Environmental Services (MES) . We do not want to burden you with <br /> unnecessary investigation and remediation costs. DHS believes <br /> that the approach presented in the Remedial Action Order will <br /> minimize the costs to you and ensure site clean up to a level <br /> that will protect human health and the environment. <br /> We would also like to note that some of the previous findings of <br /> 1 MES are not supported by adequate data. Specifically: <br /> _ 1. No evidence has been presented that shows the soil <br /> contamination is confined to the covered area. <br /> 2 . MES has not shown that contamination is not migrating <br /> off-site. DHS personnel have noted run-on accumulation <br /> under the cover during periods of rainfall . The near-by <br /> aquatic habitat is very sensitive to the metals <br /> found on-site and no evidence has been presented that <br /> would show that contaminants are not entering the surface <br /> waters. <br /> 3 . MES suggests cleanup of soil contamination to levels that <br /> would give Waste Extraction Test results below the Soluble <br /> Threshold Limit Concentration (STLC) . STLC and Total <br /> Threshold Limit Concentrations (TTLC) are not cleanup <br /> levels. Our goal is to clean up to background levels <br /> unless it can be shown that higher levels will not have <br /> adverse effects on human health or the environment. <br /> In response to your letter of 22 December, 1987 , we approve your <br /> request for extension of the submittal date for the RI/FS draft <br /> RAP workplan and the initial monthly report to 1 February, 1988. <br /> We do want submitted within one week of receipt of this letter, <br /> the resume of Craig Stewart and the statement of qualifications <br /> of Hydrotech Consultants. Concerning your questioning the need r <br />