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COLUMBIA ANALYTICAL SERVICES, INC. <br />' Analytical Report <br /> Client: EMCON Associates ®ate Received: 12/08/92 <br /> Project: Teichert Construction/OF90-002.01 Service Request No.: SJ92-1540 <br /> Sample Matrix: Water <br /> BTEX and TPH as Gasoline <br /> EPA Methods 503018020/California DHS LUFT Method <br /> Ng/L (ppb) <br /> Sample Name: MW-1 MW-11 MW-12 <br /> Date Analyzed: 12/08/92 12/08192 12108/92 <br /> Anal a MRL <br /> Benzene 0.5 <3. ' <3. ND <br /> Toluene 0.5 <1. ND ND <br /> Ethyibenzene 0.5 <1. ¢a NO ND <br />' Total Xylenes 0.5 I <1. °Q ND ND <br /> TPM as Gasoline <br /> 50 7 2W, 4¢� 57. � � NO <br /> TPH Total Petroleum Hydrocarbons <br /> MRL Method Reporting Limit <br /> ND None Detected at or above the method reporting limit <br /> ' Raised MRL due to matrix interference. <br /> ° Raised MRL due to high analyte concentration requiring sample dilution. <br /> The sample contains a lower boiling point hydrocarbon mixture quantitated as gasoline. The <br /> ' chromatogram does not match the typical gasoline fingerprint. <br /> Approved by: —A�u <br /> Date: <br /> 2 <br /> 1921 Ringwood Avenue • Son lose, California 95131 • Telephone 4081437-2400 Fax 4081437 9356 <br />