SITE INFORMATION AND CORRESPONDENCE

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8 May 1989 contamination since these wells were installed outside the area of suspected (and obvious) soil contamination. We should note here that in our discussions with Mr. Boggs of the Regional Board, analysis of additional soil samples for contamination (nearer the old excavation) was later requested and is included in our workplan. 2. A table of groundwater surface elevations determined at the times the wells have been sounded in the past. 3. A well construction diagram showing the details of the proposed new (and in this case existing) monitoring wells. 4. A health and safety plan for the proposed work. Regarding the additional comments and recommendations. 1. When the two new proposed wells are installed, water samples from all wells on the property will be taken and analyzed for TPH and BTEX. 2. Based on our 21 April 1989 telephone conversation with Mr. James, we will, in the continously cored borings, obtain a brass lined soil sample by Modified California Sampler, at five foot vertical intervals. These samples will be field - screen for volatiles using a photoionization detector. Once all samples are taken and the field data analyzed, those samples exhibiting contamination will be --within 1 day of sampling --taken to the analytical laboratory for TPH and BTEX analyses. 3. All groundwater and soil sample data from the investigation will be presented in tabular form in the final problem assessment report. 4. The boring logs from all borings and well installations will be included in the final report. In addition, we plan to construct geologic cross sections from the boring log data. We will endeavor to complete the work requested by 15 June 1989, as outlined in Mr. James letter. Timing for permits, scheduling of equipment, and laboratory turnaround times will govern the actual completion date.