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l MI CX-f-1 EAIYEA <br /> Mr. Verrill M. Norwood <br /> 13 January 1997 <br /> Page 4 <br /> One soil sample collected from above the top of the uppermost saturated zone will be selected for <br /> analysis from each of the four groundwater monitoring well borings. This depth is expected to be <br /> 10 feet below the ground surface, but the actual depth may vary because of the recent flooding. A <br /> 40-m1 VOA travel blank containing distilled water will accompany the soil samples and will be <br /> analyzed for quality control purposes. <br /> GROUNDWATER INVESTIGATION REPORT <br /> Following completion of the laboratory analyses, a report will be submitted presenting conclusions <br /> regarding the extent of VOCs present in groundwater at the Tray Facility and the local groundwater <br /> gradient and flow direction. The report will also present a site map indicating well locations and <br /> the calculated groundwater gradient direction, tabulated summaries of soil and groundwater data, <br /> groundwater level measurements, well completion and soil boring logs, descriptions of sampling <br /> procedures, and copies of laboratory analysis reports. <br /> SCHEDULE <br /> Field work will commence within five weeks of receiving written approval of the work plan from <br /> the Regional Board. We have assumed that this will allow sufficient time to obtain access <br /> agreements for drilling the offsite wells. Drilling and sampling activities will be completed within <br /> two and one-half weeks of commencing the field work. Laboratory analytical results will be <br /> completed on a two-week turnaround and the final report will be submitted to the Regional Board <br /> within four weeks of receiving the results from the laboratory. <br /> If you have any questions regarding our report, please do not hesitate to contact us at (916) 485- <br /> 7222. <br /> Sincerely yours, <br /> HELMICK& LERNER INC. CO ;' DENNIS B. <br /> Cy ; NAK.AMOTO CP <br /> W 353 <br /> No.EG 1 353 <br /> ED <br /> CERTIFIED <br /> ENGINEERING ; <br /> Dennis B.Nakamoto, C.E.G. GEOLOGIST <br /> Project Manager OF•CA`�FO� <br /> attachments: Figure 1 <br /> cc: Mr. Tim Vickers -All Pure Chemical Company, Tracy, California <br /> Ms. Polly Lowry - Central Valley Regional Water Quality Control Board. <br /> Z:\P\00907\WP-GW97\WORK PLN.DOC <br />