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�] Superior Precision Analytical, Ir7c_ <br />' r ,25 Ar-afc Drive Suite 1 14 • Martinez California 94553 ■ f5101 229 15 12 / fix (5 9 i 526 <br /> -Y_ L71 <br /> 1Aoq I , <br /> � <br /> 1? <br />' 1vALNUTCREEK FILE# <br /> O E R T I F I C 4 T E O F A N A L Y S I S �Ca <br /> LABORATORY NO 35361 DATE RECEIVED 03/30/92 <br /> ULLIENT <br /> E �T CRM-WEST DATE REPORTED _ 04/C6;92 <br /> JOS NO 1572 04 DATE SAMPLED 03/30/92 <br />' ANALYSIS FOR BENZENE , TOLUENE , ETHYL BENZENE & XYLENES <br /> by EPA SW-846 METHODS 5030 and 8020 <br /> 1 Concentration( ug/kg ) <br /> L;B --thy 1 <br />'# Sample Iuant fi cation Benzene Toluene Benzene Xylenes <br /> ---- ------------------------ ------- ---- --- --- <br /> 0 21000 31000 4100 15000 <br /> MW1 A 290 200 230 230 <br /> MW3A 7 5 6400 22000 24000 83000 <br /> 4 MW3A 15 ND<3 ND<3 ND<3 ND<3 <br /> MW2A 10 5 ND<3 6 16 <br /> MW2A 1 -C 5 ND<3 ND<3 ND<3 ND<3 <br /> MW4A 10 NO<3 ND<3 ND<2 ND<3 <br />' 8 MW4A 15 ND<3 ND<3 ND<3 ND<3 <br />' ug/1,9 - parts per d i l l i on ( ppb ) <br /> Method ^atect7cri Limit in Soil J ug/kg <br /> QAQC Summar/ <br />' Cady Stanaard run at 20ug/L RPD = : 15a <br /> lS/MSD ^g arage Recovery = 110 % Duplicate RPD = :5 <br /> Richard Srna, Ph <br /> G <br /> Laboratory D ilrecto <br /> 1 <br />' Certified Laboratories <br />