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1 <br />' race Analysis Laboratory, Inc. Telephone (510) 783-6960 <br /> 3423 Investment Boulevard #8 • Hayward Calitornia 94545 Facsimile (510) 783 1512 <br /> LOG NUMBER 3798 <br /> DATE SAMPLED 11/04/93 <br /> DATE RECEIVED 11/05/93 <br /> DATE ANALYZED 11/08/93 <br />' DATE REPORTED 11/19/93 <br /> CUSTOMER- Conoco, Inc. <br /> REQUESTER Lenard Long of Sunriver Engineering and Construction, Inc <br /> PROJECT No 93036, 4325 East Washington Street, Stockton, CA <br /> Sample Type Vapor <br /> I-1 Method Blank <br /> Method and Concen- Reporting Concen- Reporting <br />' Constituent: Units tration Limit tration Limit <br /> Modified DHS Method- <br /> Total Petroleum Hydro- <br /> carbons as Gasoline mg/m3 3,900 84 ND 10 <br /> Modified EPA Method 8020 for <br /> Benzene mg/m3 12 3.9 ND 0 10 <br /> Toluene mg/m3 67 4 0 ND 0 10 <br />' Ethylbenzene mg/m3 120 11 ND 0 11 <br /> Xylenes mg/m3 970 11 ND 0 30 <br /> QC Summary <br />' % Recovery 89* <br /> RPD- 1 5 <br />' Concentrations reported as ND were not detected at or above the reporting limit <br />' * The Recovery for vapor samples is based on the Laboratory Control Sample. <br /> — - G—� l `--- — <br /> Louis W DuPuis <br /> Quality Assurance/Quality Control Manager <br /> Founding Member of the Association of California Testing Laboratories <br />