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�, 12th Street • rd <br /> Suite100 Woodward-Clyde Consultants <br /> Suite 1 <br /> Oakland,CA 94607-4014 <br /> (415)893-3600 <br /> t <br /> January 3, 1990 <br /> 90189K <br /> JAN 1 0 1,oa0 <br /> Anthony J. Landis !Yl" ,MENTAL HEALTH <br /> Chief Site Mitigation Unit <br /> Department of Health Services f'&MIT/SERVICES <br /> Toxic Substances Control Division <br /> Northern California Section <br /> 4250 Power Inn Road <br /> Sacramento, CA 95826 <br /> Re: Docket HSA, Post Closure Groundwater Monitoring Program, Dated <br /> 29 April 1988, LIKA Corporation, Former Field Avenue Annex <br /> Dear Mr. Landis : <br /> Pursuant to the referenced agreement, Woodward-Clyde Consultants has <br /> completed groundwater monitoring for the seventh quarter. As specified <br /> in the agreement, groundwater samples were taken from three monitoring <br /> wells designated as MW-1, MW-3, and MW-4. A travel blank designated <br /> MW-12 and a blind duplicate sample designated MW-13 were also submitted <br /> for analysis. All of the samples were analyzed at a Department of <br /> Health Services-certified laboratory for the following parameters : <br /> Conductivity, pH, Total Dissolved Solids, Total Copper, Total Nickel , <br /> Total Lead and Hexavalent Chromium. The three sampled wells were also <br /> sounded to determine groundwater elevation. <br /> The groundwater samples were collected on November 30, 1989 and taken to <br /> California Analytical Laboratories in West Sacramento. Appropriate <br /> chain of custody was maintained. -A summary of the results is presented <br /> in Table 1, and a copy of the laboratory report is attached. <br /> During the analysis of the groundwater samples collected for the seventh <br /> quarter, the laboratory exceeded the hold time for TDS by one day. This <br /> was brought to the attention of Ms. Lorna Kirby of your department. Ms. <br /> Kirby did not believe that exceeding the hold time by one day for TDS <br /> would adversely affect the analytical results, and it would be <br /> acceptable to submit the current analytical data. <br /> Should you have any questions, please call me. <br /> Sincerely, <br /> Christopher L. Vais <br /> Senior Project Engineer <br /> CLV/sst <br /> COT/90189K-L7 <br /> Enclosure <br /> Consulting Engineers,Geologists <br /> and Environmental Scientists Q <br /> Offices in Other Principal Cities _ <br />