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Pctce C 0 R P O R A T E 0 REPORT OF LABORATORY ANALYSIS <br /> TNF ASSURANCE OF DUALITY <br /> Ms Lisa Rainger QUALITY CONTROL DATA April 22, 1992 <br /> Page 9 PACE Project Number: 420319518 <br /> Client Reference. Exxon 7-3708 <br /> TPH GASOLINE/BTEX <br /> Batch: 70 10930 <br /> Samples- 70 0044499 <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 3 ND <br /> Toluene ug/L 0.3 ND <br /> Ethylbenzene ug/L 0 3 ND <br /> Xylenes, Total ug/L 0 5 ND <br /> LABORATORY CONTROL SAMPLE AND CONTROL SAMPLE DUPLICATE: <br /> Reference Dupl <br /> Warameter Units MDL Value Recv Recv RPD <br /> Purgeable Fuels, as Gasoline (EPA 8015) ug/L 50 320 ION 100% 2% <br /> Benzene ug/L 0 3 40 0 99% 98% 1% <br /> Toluene ug/L 0 3 40 0 102% 100% 1% <br /> Ethylbenzene ug/L 0 3 40 0 102% 98% 4% <br /> Xylenes, Total ug/L 0 5 80.0 105% 101% 3% <br /> 1 <br /> MDL Method Detection Limit <br /> ND Not detected at or above the MDL <br /> RPD Relative Percent Difference <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 New York,New York <br /> FAX 415 883 2673 San Francisco California Pittsburgh,Pennsylvania <br /> Kansas City Missouri Denver Colorado <br /> Los Angeles California <br />