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��C ANATEC LABORATORIES v"` INC. 435 Tesconi Circle Santa Rosa, California 95401 707-526-7200 Annelise Jade Bazar September 1, 1987 EMCON Associates ANATEC Log No: 9985 (1-2) 1921 Ringwood Avenue Series No: 394/040 San Jose, CA 95131 Client Ref: P.O. # 15198 Subject: Analysis of Two Water Samples Identified as "Project 939-02.04 , E87-0852" Received August 13, 1987 . Dear Ms. Bazar: Analysis of the above referenced samples has been completed. In- cluded in this report are a summary of analytical methods (Table 1) and the results of analysis (Table 2) . Brief descriptions of sample handling, preparation and metals analysis procedures are presented in the following paragraphs. Samples were delivered by commercial courier (National Courier Service) on August 13, 1987 at 8:30 pm, under documented chain-of- custody. On receipt, sample custody was transferred to ANATEC sample control personnel. Samples were noted to be intact, legibly labeled, cold by virtue of _refrigerated shipment and in otherwise good condition. Additional samples received in the same shipment were assigned separate log numbers according to instructions re- ceived in the accompanying purchase orders; results of these analyses will be reported under separate cover. - Subsequent to check-in, the pH of each sample was verified to be less than 2, and the samples were placed in secure storage where they were kept at 40C until analysis commenced. For all metals measurements (except mercury) , aliquots of sample were digested with appropriate mineral acids, brought to a speci- fied volume with reagent grade water and analyzed by ,atomic spec- troscopy as referenced in Table 1 . In preparation for measurement of mercury content, aliquots of sample were digested with mixed mineral acids and potassium per- manganate. Hydroxylamine hydrochloride was added to the digested samples to remove excess permanganate. Mercury was reduced to the elemental state by the addition of stannous chloride and aerated from solution in a closed system attached to an atomic absorption spectrophotometer. Absorbance was measured as a function of mer- cury concentration.