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1 <br /> CASTLE 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 Project ID Rainwater Car Wash Method EPA 5030/8260 <br /> ' of Northern California Reference Number 4727 Instrument ID VARIAN GC/MS <br /> 837 Shaw Road Matrix Water Prepared 06-03-02 <br /> Stockton,CA 95215 Analyst Clan J Cone Analyzed 06-03-02 <br /> Attn Tim Cuellar Reported 06-07-02 <br /> QUALI'F'Y CONTROL DATA REPORT <br /> ' SPIKE ID VWMS-6032 <br /> Reporting BLANK Spiking Control %R <br /> ' Limit Result Level Spike Limits <br /> IL /L IL %R <br /> COMPOUNDS <br /> t-But 1 Alcohol(t-BA) 200 ND 750 125% 41 8-168 <br /> Methyl t-but I ether MTBE 050 NO 250 972% 624-127 <br /> Dnsoprop I ether DIPS 050 NO 250 105% 51 4-151 <br /> Ethyl t-But l ether ETBE 050 ND 250 972% 674-138 <br /> t-Am I meth I ether TAME 050 ND 250 868% 602-122 <br /> ' 1 2-Dichloroethane 1,2-DCA 050 ND 250 972% 697-124 <br /> Ethylene dibromide(EDB) 050 ND 250 964% 763-127 <br /> Surrogates <br /> 1,2-Dichloroethane-d4 100 982% 100 974% 529-141 <br /> '• Toluene-d8 100 926% 100 96 8% 764-129 <br /> I <br /> Spiking MATRIX MATRIX %R %RPD <br /> Level SPIKE SPIKE DUP Limits <br /> /L %R %R <br /> COMPOUNDS <br /> t-Butyl Alcohol(t-BA) 750 976% 123% 41 8-168 228% <br /> Methyl t-but I ether MTBE 250 884% 948% 624-127 5 71% <br /> Diisopro I ether DIPS 250 103% 101% 514-151 156% <br /> Ethyl t-Butyl ether ETBE) 250 868% 848% 574-138 233% <br /> t-Ami methyl ether TAME 250 648% 620% 602-122 439% <br /> ' 1,2-Dichloroethane 1,2-DCA 250 924% 960% 697-124 377% <br /> Ethylene dibromide(EDB) 250 920% 964% 763-127 465% <br /> Surro ate <br /> 1,2-Dichloroethane-d4 100 971% 102% 529-141 463% <br /> ' Toluene-d8 100 933% 952% 76 4-129 202% <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 OC limits and recoveries for MS/MSD's are advisory only and are not used to accept or <br /> reject batch results <br /> ' f <br /> ANALYST APPROVED BY <br /> Clan J Cone Jam Phillips <br /> La oratory Director <br /> i <br /> � I <br />