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rr <br />ANATEC <br />LABORATORIES <br />LF INC. <br />435 Tesconi Circle <br />Santa Rosa, California 95.01 <br />%-:Jv'eCQ;ti <br />707-526-72100 <br />Annelise Jade Bazar September 1, 1987 <br />EMCON Associates ANATEC Log No: 9985 (1-2) <br />1921 Ringwood Avenue Series No: 394/040 <br />San Jose, CA 95131 Client Refs P.O. #15198 <br />Subjects Analysis of Two Water Samples Identified as "Project <br />939-02.04, E87-0852" Received August 13, 1987. <br />Dear Ms. Bazars <br />Analysis of the above referenced samples has been completed. In- <br />cluded in this report are a summary of analytical methods (Table <br />1) and the results of analysis (Table 2). Brief descriptions of <br />sample handling, preparation and metals analysis procedures are <br />presented in the following paragraphs. <br />Samples were delivered by commercial courier (National Courier <br />Service) on August 13, 1987 at 8:30 pm, under documented chain -of - <br />custody. On receipt, sample custody was transferred to ANATEC <br />sample control personnel. Samples were noted to be intact, legibly <br />labeled, cold by virtue of refrigerated shipment and in otherwise <br />good condition. Additional samples received in the same shipment <br />were assigned separate log numbers according to instructions re- <br />ceived in the accompanying purchase orders® results of these <br />analyses will be reported under separate cover. <br />Subsequent to check-in, the pH of each sample was verified to be <br />less than 2, and the samples were placed in secure storage where <br />they were kept at 40C until analysis commenced. <br />For all metals measurements (except mercury), aliquots of sample <br />were digested with appropriate mineral acids, brought to a speci- <br />fied volume with reagent grade water and analyzed by atomic spec- <br />troscopy as referenced in Table 1. <br />In preparation for measurement of mercury content, aliquots of <br />sample were digested with mixed mineral acids and potassium per- <br />manganate. Hydroxylamine hydrochloride was added to the digested <br />samples to remove excess permanganate. Mercury was reduced to the <br />elemental state by the addition of stannous chloride and aerated <br />from solution in a closed system attached to an atomic absorption <br />spectrophotometer. Absorbance was measured as a function of mer- <br />cury concentration. <br />Plate F-5 <br />Biological Studies Laboratory Analysis 0 Research <br />