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�a <br /> SUPERIOR ANALYTICAL LABORATORIES, INC. DOHS #4 <br /> $2$ ARNOLD,STE. l l4 • MARTINEZ,CALIFORNIA 94553 • (415) 229.1512 <br /> DOHS #220 <br /> -- ` E R T I F I C A T E O F A N A L Y S I S <br /> DATE RECEIVED: 05/08/91 <br /> LABORATORY NO. : 83059 DATE REPORTED: 05/15/91 <br /> �- CLIENT: Alton Geoscc01 <br /> CLIENT JOB NO. : 30'136 <br /> ANALYSIS bOREPABENZENE, <br /> SW-846TOLUENE, <br /> Methods 5030ETHYL <br /> andN8020 XYLENES <br /> Concentration(u9/L) <br /> Ethyl <br /> LAB Benzene Toluene Benzene Xylenes <br /> 0 Sample Identification _______ _______ <br /> _ ----- ----_^-_ ------ ND<0.3 ND<0.3 MD<❑.3 ND<0.3 <br /> 1 AW-1 ND<0.3 ND<0.3 ND<O,g N0D80.3 <br /> 2 AW-2ND<0.3 ND<0.3 0.3 <br /> _. AW--3 ND<0.3 ND<0.3 ND<0.3 ND<0.3 <br /> 3 <br /> 3AW-4 NDC0.3 ND<0.3 ND<0.3 ND<0.3 <br /> ND<0.3 ND<0.3 <br /> 5 AW-5 ND<0.3 ND<0.3 <br /> _. 5 AW-6 ND<0.3 ND<0.3 ND<0.3 ND<0.3 <br /> 7 AW-7 ND<0.3 ND<0.3 ND<0.3 ND<0.3 <br /> 8 AW-8 <br /> ug/L - parts Per billion (Ppb) <br /> Method Detection Limit in Water: 0.3 ug/L <br /> QAQC Summary: <br /> Daily Standard run at 20ug/L: RPD = <15% <br /> MS/MSD Average Recovery =101%: Duplicate RPD = <7 <br /> Richard Srna, Ph.D. <br /> L borat y Mana r <br /> ("ITSTANDING QUALITY AND SERVICE <br /> __ <br /> r <br />