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pacen REPORT OF LABORATORY ANALYSIS <br /> THE ASSURANCE OF CIUALITY <br /> tr. James Jacobs QUALITY CONTROL DATA April 13, 1992 <br /> Page 28 PACE Project Number. 420406516 <br /> Client Reference: Exxon 7-3330 <br /> TPH GASOLINE/BTEX <br /> Batch 70 11502 <br /> Samples, 70 0067901, 70 0067928, 70 0067936, 70 0067952 <br /> METHOD BLANK- <br /> Method <br /> Parameter Units MDL Blank <br /> TOTAL FUEL HYDROCARBONS, (LIGHT) . - <br /> Purgeable Fuels, as Gasoline (EPA 8015) ug/L 50 ND <br /> PURGEABLE AROMATICS (BTXE BY EPA 8020) - <br /> Benzene ug/L 0.5 ND <br /> Toluene ug/L 0.5 ND <br /> Ethylbenzene ug/L 0.5 ND <br /> Xylenes, Total ug/L 0.5 ND <br /> LABORATORY CONTROL SAMPLE AND CONTROL SAMPLE DUPLICATE: <br /> Reference Dupl <br /> 49meter Units MDL Value Recv Recv RPD <br /> Purgeable Fuels, as Gasoline (EPA 8015) ug/L 50 354 108% 94% 13% <br /> Benzene ug/L 0.5 40.0 111% 106% 4% <br /> Toluene ug/L 0.5 40 0 109% 104% 4% <br /> Ethylbenzene ug/L 0.5 40.0 109% 104% 4% <br /> Xylenes, Total ug/L 0.5 80.0 110% 101% 8% <br /> MDL Method Detection Limit <br /> RPD Relative Percent Difference <br /> 00 <br /> 11 Digital Drive Offices Serving Minneapolis Minnesota Charlotte North Carolina An Equal Opportunity Employer <br /> Novato CA 94949 Tampa Florida Asheville North Carolina <br /> TEL 415 883 6100 Iowa City,Iowa Now York New York <br /> FAX 4158832673 San Francisco California Pittsburgh Pennsylvania <br /> Kansas City Missouri Denver Colorado <br /> Los Angeles California <br />