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r <br /> t <br /> Trace Analysis Laboratory, Inc. ' - Telephone (510) 783-696o <br /> 3423 Investment Boulevard #8 • Hayward 'California 94545 r Facsimile (510)'783-1512 , <br /> LOG NUMBER 3988' � r <br /> DATE SAMPLED 01%03/94 <br /> DATE RECEIVED 01/05/94 ,r <br /> DATE ANALYZED. 01/07/94 <br /> DATE REPORTED• 01/19/94 <br /> CUSTOMER: Conoco,' Inc L_ <br /> REQUESTER Lenard Lonq of Sunriver Engineerinq and Construction, Inc. <br /> PROJECT: No 93036, Washinqton Avenue, Stockton , <br /> r Sample Type Vapor <br /> 1-1 Method Blank <br /> Method and " Concen- Reportinq Concen- Reportinq ' <br /> Constituent- Units tration Limit tration Limit , <br /> Modified DHS Method + <br /> Total Petroleum Hydro- <br /> carbons as Gasoline mq/m3 4,800 320 ND 10' " <br /> Modified EPA Method 8020 for <br /> Benzene mq/m3 12 6r5 ND 0 10 „ <br /> Toluene mq/m3 67 9 2 ND 0 10 <br /> Ethy-lbenzene____�;� =_`mq/m3- - - 120,E�_`_ 6"9� _- _=ND, 0 10= _m-- <br /> Xylenes mg/m3 1 , 100 9 7 ND 0 30 <br /> QC Summary <br /> Recovery 110* <br /> % RPD 12 <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 /> Louis <br /> ample-Lou ,5 W DuPu i s C <br /> Quality Assurance/ Quality Control Manader <br />