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,37/01/92 12 33 %Y415 783 1512 TRACE, ANALYSIS 16 008 <br /> Trace Analysis Laboratory, Inc. 'telephone (510) 7834960 <br /> 3423 Investment Boulevard. No • Heyward, Callfornla 94545 Facsimile (910) 783-15 <br /> Loc NUMBER: 2105 <br /> =, DATE SAMPLED: 05/08/92 <br /> DATE RECEIVED: 05/08/92 <br /> DATE ANALYZED: 05/18/92 <br /> DATE REPORTED: 05/22/92 <br /> CUSTOMER: Conoco, Inc <br /> REQUESTER: Joe DeBiaso <br /> PROJECT: No. 400511-M, Stockton <br /> Method and Col ce <br /> ren- Reporting Concen- Reporting <br /> Const-i.tuent: Units tratign Limit tration - Limil <br /> DNS Method: <br /> Total Petroleum Hydro- <br /> carbons as Gasoline mg/m3 41900 430 NO 8.6 <br /> Mod 11 ied,EPA Method 80ZO fora • <br /> Benzene mg/rn3 NO 6.5 NO 0.13 <br /> Toluene mg/m3 110 3.4 NO 0.067 <br /> Ethylbenzene mg/m3 63 3.8 ND 0.076 <br /> Xylenes mg/m3 770 10 NO 0.21 <br /> L-Altmary2 <br /> % Recovery: 104* <br /> % RPD: 18 <br /> Concentrations reported as NO were not detected at or above the reporting limit. <br />* The Recovery for air samples is based on the the Laboratory Control Sample. <br /> Louis W. DuPuis <br /> Quality Assurance/quality Control Manager) . <br /> A-4 <br />