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r Ci <br /> COLUMBIA ANALYTICAL SERVICES, INC. <br /> QA/QC Report <br /> ' Client: EMCON Associates Date Received: 03/05/93 <br /> Project: Teichert Construction-Tracy/OF90-004.01 Service Request No.: SJ93-0323 <br /> Sample Matrix: Water <br /> i <br /> l <br /> i <br /> 5 <br /> Surrogate Recovery Summary <br /> BTEX and TPH as Gasoline <br />+, EPA Methods 5030/8020/California DHS LUFT Method <br />+1 <br /> 1 " <br /> Sample Name Date Analyzed Percent Recovery <br />�r a,a,a-Trifluorotoluene <br /> i <br /> MW-1 03/15/93 96. <br /> Method Blank 03/15/93 98. <br /> I' <br /> CAS Acceptance Criteria 70-130 <br /> TPH Total Petroleum Hydrocarbons <br /> Approved by: Date: <br /> 4 <br /> 1921 Ringwood Avenue • Son lose. California 95131 0 Telephone 4081437-2400 • Fox 4081437.9356 <br />