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�- —` ERM-WEST Project #9186 00 <br /> Part of Stockton <br /> Stockton, California <br /> TEG PROJECT #931006C <br /> BTEX (EPA 602)& TPH (EPA mod8015) ANALYSES OF WATERS <br /> SAMPLE DATE DATE GASOLINE BENZENE TOLUENE ETHYLBNZ XYLENES <br /> NUMBER COLLECTED ANALYZED ugll ug/i ug/f ug/1 ug/1 <br /> BLANK 10106193 10106193 nd nd nd nd nd <br /> W S1 10106/93 10106193 20443 985 0 299.5 7372 2181.0 <br /> DETECTION LIMITS 500 03 03 03 06 <br /> "nd" INDICATES NOT DETECTED AT LISTED DETECTION LIMITS <br /> ANALYSES PERFORMED IN TEG's DHS CERTIFIED MOBILE LAB (#1671) <br /> ANALYSES PERFORMED BY Mr Lett Jonsson& Mr Mark McMurry <br /> DATA REVIEWED BY Mr Mark Jerpbak <br /> 3 <br /> QA/QC DATA- MATRIX SPIKE ANALYSES - WATERS <br /> SAMPLE DATE GASOLINE BENZENE TOLUENE ETHYLBNZ XYLENES <br /> NUMBER ANALYZED ug/1 ugll u9/1 ugll ug/1 <br /> Spiked Conc 10107193 2000 50 50 50 15.0 <br /> Measured Conc 1853 51 49 48 145 <br /> %Recovery 927% 102.1% 989% 964% 9&8% <br /> Spiked Conc 10107193 2000 50 50 50 150 <br /> Measured Conc 1878 54 51 50 157 <br /> % Recovery 939% 1080% 1022% 1004% 1048% <br /> RPD 13% 56% 33% 40% 7.9% <br /> ACCEPTABLE RAD LIMIT = 15% <br /> ANALYSES PERFORMED IN TEG's OHS CERTIFIED MOBILE LAB (#1671) <br /> ANALYSES PERFORMED BY Mr Leif Jonsson& Mr Mark McMurry <br /> DATA REVIEWED BY Mr Mark Jerpbak <br /> Transglobal Environmental Geochemistry <br /> PO Box 162580, Sacramento, CA 95816 Phone (916) 736-3233 Fax: (916) 452-5806 <br />