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STATE OF CALIFORNIA—HEALTH AND WELFARE AGENCY GEORGE DEUKMEJIAN, Gavemo, <br /> DEPARTMENT OF HEALTH SERVICES <br /> TOXIC SUBSTANCES CONTROL DIVISION ; <br /> REGION 1 <br /> 4250 POWER INN ROAD <br /> SACRAMENTO,CA 95626 <br /> (916)7393145 {� <br /> October 17, 1988 OCT 18 1988 81988 <br /> ENVRDNM' ,'.'ti;"L HEALTH <br /> PERMIT!SERVICES <br /> Joe Creel <br /> Colonel, U.S. Army <br /> Commander, Defense Depot Tracy <br /> Chrisman Road <br /> Tracy, CA 95367-5000 <br /> Dear Colonel Creel : <br /> CONTRACT STIPULATIONS FOR THE RI/FS AT DEFENSE DEPOT TRACY <br /> This letter brings to your attention a problem with the contract <br /> language for Defense Depot Tracy's (DDTC) RI/FS. The contract, <br /> as written, does not allow sufficient flexibility for changing <br /> situations in DDTC's RI/FS program. <br /> For example, the contract contains specifications for twenty-two <br /> additional groundwater monitoring wells. The first phase, <br /> consisting of twelve wells, will be located in a section of land <br /> not previously studied. There is insufficient knowledge of how <br /> the geologic strata of this new area interacts with the area <br /> beneath DDTC. This concern was brought to the attention of the <br /> Army Corps of Engineers, the Defense Logistics Agency, and Base <br /> Environmental staff at a technical meeting held on August 9, <br /> 1988 . Staff from both the Department of Health Services (DHS) <br /> and the Regional Water Quality Control Board (RWQCB) have made <br /> recommendations on how to gain a better understanding of the new <br /> area prior to the construction of all twelve wells (reference DHS <br /> letter, August 24, 1988 ; RWQCB letter, August 25, 1988) . <br /> Regretfully all recommendations presented were considered not <br /> feasible by the Army due to contract stipulations. <br /> DHS and RWQCB are concerned that data obtained from the new wells <br /> will not sufficiently correlate with previous data. This could <br /> jeopardize the usefulness of new wells and necessitate the <br /> construction of additional wells beyond the twenty-two already <br /> specified. Staff of both DHS and RWQCB feels that the minor <br /> additional cost incurred as a result of agency recommendations, <br /> specifically twenty-four hour turnaround sampling and new <br /> geologic cross-sections, greatly outweigh the probable cost of <br /> additional monitoring wells. <br />