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' COLUMBIA ANALYTICAL SERVICES, INC. <br /> Client: EMCON Associates Date Received: 08/26/92 <br /> Project: A. Teichert & Sons, Inc./F90-02.01 Work Order #: SJ92-1072 <br /> Sample Matrix: Water <br />' QA/QC Report <br /> Surrogate Recovery Summary <br />' TPH as Diesel <br /> EPA Method 3510/DHS LUFT Method <br />' Sample Name Date Analyzed Percent Recovery <br /> P-Terphenyl <br /> MW-10 09/04/92 102. <br /> MW-11 09/04/92 95. <br /> MW-12 09/04/92 101 . <br /> MW-13 09/04/92 95. <br /> Method Blank 09/04/92 89. <br /> 1 <br /> CAS Acceptance Criteria 55-145 <br />' TPH Total Petroleum Hydrocarbons <br /> ,Approved by �' -k <br /> Date <br /> 6 <br /> 1921 Ringwood Avenue San Jose, California 95131 • Telephone 4081437-2400 Fox 408/437-9356 <br />