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Trace Analysis Laboratory, Inc. Telephone (510) 783-6960 <br /> 3423 Investment Boulevard #8 • Hayward, Californta 94545 Facsimile (510) 783-1512 <br /> LOG NUMBER 4395 <br /> DATE SAMPLED 05/09/94 <br /> ^' DAVE RECEIVED. 05/10/94 <br /> DATE ANALYZED 05/12/94 <br />' DATE REPORTED. 05/24/94 <br /> CUSTOMER. Conoco, Inc. <br /> REQUESTER. Lenard Long of Sunrlver Engineering and Construction, Inc <br /> PROJECT. No 93036, Stockton, 4325 Washington Street, Stockton, CA <br /> Sample Type. Vapor <br />' <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 1 ,400 200 12 10 <br /> Mod i f i ed EPA Method 8020 for <br /> enzene mg/m3 ND 2 0 ND 0 10 <br /> Toluene mg/m3 5 8 2 0 ND 0 10 <br /> Ethylbenzene mg/m3 12 2 0 ND 0 10 <br /> Xylenes mg/m3 130 6 0 ND 0 30 <br /> C Summar <br /> 1 % Recovery 82* <br /> RPD 9 4 <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 W.�DuPuis <br />' Quality Assurance/Quality Control Manager <br />' r o inomq hlemlxt of flee As�ocr ifioo of Caffforma 1 e5fhnq Uaborofones <br />