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Pevine-FrickeeRecon <br /> ENGINEERS,HVDROGEOLOGISTS a APPLIED SCIENTISTS <br /> Dizio stated that because Dr. Chuck Schmidt was conducting the field work, and given his <br /> expertise in the field, DTSC approved of the proposed flux chamber sampling procedures. As <br /> stated below, we are in the process of obtaining a contract with DTSC to provide agency oversight <br /> for the HRA. <br /> 2. The SDCDs needs to decide which State agency(Office of Environmental Health Hazard Assessment or Department of <br /> Toxic Substances Control)they prefer to use for review of the HRA. If DTSC is the choice(as indicated verbally), then <br /> the responsible parties need to begin the contracting process immediately. <br /> As we discussed with Ms. Wyels on December 2, 1997, the SDCDs have chosen DTSC to provide <br /> agency oversight for the HRA. We are preparing the scope of work to be submitted to DTSC for <br /> contracting purposes, using Dr. Dizio's suggested format. We anticipate completing the <br /> contracting process in the first quarter of 1998. <br /> MONITORING WELL MW-21 EVALUATION AND RECOMMENDATIONS (16 <br /> OCTOBER 1997) <br /> 1. We did not receive the 7 May 1997 letter to Lincoln Properties which contained revisions to the workplan.Therefore, <br /> we did not approve the work described by this report. In the future,all workplan, addendums, and revisions are to be <br /> sent to Board staff in time for review and comment. <br /> We apologize for not originally providing the referenced letter to the RWQCB and have attached a <br /> copy to be provided to the RWQCB. The SDCDs did receive approval for the abandonment <br /> procedures from the San Joaquin County Public Health Services, Environmental Health Division, <br /> through the permitting process. We acknowledge the RWQCB's request to have sufficient time to <br /> review and provide comments to all documents submitted to the RWQCB for approval and are <br /> committed to doing so. <br /> 2. I approve the proposal to abandon well MW-21. <br /> MW-21 was successfully decommissioned during the period of November 10 through 21, 1997. <br /> The results of this field work will be described in the draft Interim Source Area RI Report to be <br /> submitted to the RWQCB in January 1998. <br /> 3. The new B zone well is a cluster with screens at three discrete intervals of the B zone. The first round of analytical <br /> results show that the first two intervals of the B zone are highly contaminated while the third is not. How are the other B <br /> zone wells constructed? Will the B zone data be skewed if different wells are screened across different intervals of this <br /> zone? <br /> Attached is a table showing monitoring well construction data for all A-, B-, and C-zone <br /> monitoring wells located at Lincoln Center and in the adjacent neighborhoods. The newly installed <br /> B-zone monitoring wells were screened in the first sand interval below the A/B aquitard at each <br /> location, with the exception of well cluster MW-203131,2,3. Well cluster MW-203B-1,2,3 was <br /> Lir-Resp-RWQCB-Dcc97-041I I:SRL 5 <br />