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COLUMBIA ANALYTICAL SERVICES, INC. <br /> Client: EMCON Associates Date Received: 08/17/92 <br /> Project: A. Teichert & Sons/F90-02.01 Work Order #: SJ92-1038 <br /> Sample Matrix: Soil <br /> 1 <br />' QA/QC Report <br /> Surrogate Recovery Summary <br />' TPH as Diesel <br /> EPA Method 3550/DHS LUFT Method <br />' Sample Nam_a Date Analyzed Percent Recover <br /> P-Terphenyl <br />' MW-12 41-41 .5 09/08/92 74. <br /> MW-12 80.4-80.9 09/08/92 67. <br /> MW-13 41-41 .5 09/08/92 115. <br /> MW-13 80.5-81 09/08/92 93. <br /> B92-1 11-11.5 09/08/92 69. <br /> B92-1 51-51.5 09/08/92 85. <br />' <br /> Method Blank 09/08/92 99. <br /> CAS Acceptance Criteria 55-145 <br />' TPH Total Petroleum Hydrocarbons <br /> 1 <br />' Approved by L Date f C <br /> 7 <br /> 1921 Ringwood Avenue • Son Jose, Colifornio 95131 0 Telephone 4081407-2400 Fox 4081437-9356 <br />