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' A <br /> C STLE ANALYTICAL LABORATORY <br /> ' Environmental Testing Services 2333 Shuttle Drive,Atwater,CA 95301 Phone (209)384 2930 <br /> Certificate#2480 Fax (209)384-1507 <br /> Advanced GeoEnvironmental Inc Client Protect ID Rainwater Car Wash Method EPA 5030/8260 <br /> ' of Northern California Reference Number 7092 (1-20) Instrument ID HP 5972 MS <br /> 837 Shaw Road Sample Description Water Prepared 07-01-04 <br /> Stockton CA 95215 Analyst Scott Foster Analyzed 07-01-04 <br /> Attn Tim Cuellar Reported 07-07-04 <br /> QUALITY CONTROL DATA REPORT <br /> ' SPIKE ID VWMS-7014 <br /> Reporting BLANK Spiking Control %R <br /> ' Limit Result Level Spike Limits <br />� !L /L j.l IL %R <br /> COMPOUNDS <br /> t-But I Alcohol(t-BA) 20 ND 750 108% 553-153 <br /> ' Methyl t-but I ether (MTBE) 050 ND 250 904% 604-137 <br /> Dusoprop I ether(DIPS) 050 ND 250 876% 705-131 <br /> Eth j t-But I ether(ETBE) 050 ND 250 900% 72 1 -131 <br /> t-Am I methyl ether(TAME) 050 ND 250 91 6% 71 7-119 <br /> ' 1 2-Dichloroethane(1 2-DCA) 050 ND 250 948% 636-138 <br /> Ethylene dibromide EDB 050 ND 260 988% 667-129 <br /> Surrogates <br /> 1 2-Dichloroethane-d4 1 0 829% 100 863% 592-135 <br /> ' . Toluene-d8 10 956% 100 975% 629-132 <br /> Spiking MATRIX MATRIX %R %RPD <br /> Level SPIKE SPIKE DUP Limits <br /> tl IL %R %R <br /> COMPOUNDS <br /> t-But I Alcohol (t-BA) 750 991% 965% 553- 153 259% <br /> ' <br /> Methyl t-but I ether (MTBE) 250 880% 848% 604- 137 354% <br /> Duso rop I ether(DIPS) 250 932% 872% 705- 131 665% <br /> Ethyl t-But I ether(ETBE) 250 980% 91 6% 721 - 131 675% <br /> ' t-Am I methyl ether TAME) 250 856% 844% 717- 119 126% <br /> 1 2-Dichloroethane(1 2-DCA) 250 105% 988% 636- 138 5 41% <br /> Ethylene dibremide(EDB) 250 984% 102% 667-129 320% <br /> Surra ate <br /> 1 2-Dichloroethane-d4 100 906% 897% 592- 135 <br /> ' Toluene-d8 10 0 103% 102% 629- 132 0 978% <br /> The LCS(Laboratory Check Sample)is a control sample of known, interferent free matrix that is fortified with representative analytes and <br /> analyzed using the same reagents preparation and analytical methods employed for the samples The LCS% recovery is used for validation <br /> of sample batch results Due to matrix effects the QC limits and recoveries for MSlMSD's are advisory only and are not used to accept or <br /> reject batch results <br /> 1 <br /> ' ANALYST APPROVED BY <br /> Clan J Cone Ja e Phillips <br /> boratory Director <br />