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STATE Oh CALIFORNIA—HEALTH AND ` LRE AGENCY • GEORGE DEUKMEJIAN, Goverrpr <br /> DEPARTMENT OF HEALTH SERVICES <br /> TOXIC SUBSTANCES CONTROL DIVISION <br /> NORTHERN CALIFORNIA SECTION i <br /> 4250 POWER INN ROAD <br /> SACRAMENTO,CA 95826 January 13, 1988 <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: <br /> JUN 121989 <br /> RESPONSE TO T.F_.TTF.RS Or j)EOT•'MEtFR it AND 22, 1%P,7 <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 /> 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 <br />