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rCOLUMBIA ANALYTICAL SERVICES,INC. <br /> Analytical Report <br /> CLent: ENSR Consulting&Enguâ–ºeenng Service Request: S9701416 <br /> Project: Noreal/Stockton Scavenger/5027-002 Date Collected: 7116/97 <br /> Sample Matru: Water Date Received: 7/22/97 <br /> TPH as Diesel <br />' Prep Method EPA 3510 Umts ug/L(ppb) <br /> Analysis Method CA/LUFr Basis NA <br /> Test Notes <br /> Dilution Date Date Result <br /> Sample Name Lab Code MRL Factor Extracted Analyzed Result Notes <br /> MW2 S9701416-001 50 10 7/22/97 7122/97 700 DI <br /> Method Blank S970722-MB 50 1 7/22/97 7122197 ND X <br /> D1 Sample contained heavy oil at 9600 ppb <br /> X The method blank chromatogram contained heavy oil at 118 ppb <br /> IA/020597p <br /> Page 10 <br />