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' 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 Califomia Reference Number 4756 Instrument ID VARIAN GC/MS <br /> 837 Shaw Road Matrix Water Prepared 06-07-02 <br /> Stockton, CA 95215 Analyst Clan J Cone Analyzed 06-07-02 <br /> Attn Tim Cuellar Reported 06-17-02 <br /> { <br /> QUALITY CONTROL DATA REPORT <br /> SPIKE ID VWMS-6072 <br /> Reporting BLANK Spiking Control %R <br /> ' Limit Result Level Spike Limits <br /> /L !L !L %R <br /> COMPOUNDS <br /> t-But I Alcohol t-8A 200 ND 750 142% 418-168 <br /> ' <br /> ' ethyl t-butyl I ether MTBE 050 ND 250 105% 624-127 <br /> Diisopra I ether DIPS 050 ND 250 109% 514-151 <br /> Eth I t-But I ether ETBI 050 ND 250 103% 574-138 <br /> t-Am I methyl ether TAME 050 ND 250 868% 602-122 <br /> ' 1,2-Dichloroethane 1,2-DCA 050 ND 250 103% 697-124 <br /> Ethylene dibromcde EDB 050 ND 250 952% 763-127 <br /> Surrogates <br /> 1,2-Dichloroethane-d4 100 96 7% 100 1 101% 52 9-141 <br /> '. Toluene-d8 10 0 937% 100 930% 764-129 <br /> Spiking MATRIX MATRIX %R %RPD <br /> Level SPIKE SPIKE DUP Limits <br /> IL %R %R <br /> COMPOUNDS <br /> t-Bu I Alcohol(t-BA) 750 125% 989% 41 8-168 227% <br /> ' <br /> Methyl t-but I ether MTBE) 250 108% 976% 624-127 402% <br /> Duso ro I ether(DIPS)- 250 111% 110% 514-151 109% <br /> Ethyl t-But I ether ETBE 250 104% 100% 574-138 4 31% <br /> t-Am I methyl ether AME 250 844% 800% 602-122 530% <br /> ' 1,2-Dichloroethane 1 2-13CA 250 100% 960% 697-124 403% <br /> Ethylene dibromida(EDB) 250 952% 916% 763-127 385% <br /> Surrogate <br /> 1,2-Dichloroethane-d4 100 103% 994% 529-141 307% <br /> ' Toluene-d8 100 955% 974% 764-129 <br /> 1 <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 MSlMSD's are advisory only and are not used to acceptor <br /> reject batch results <br /> Xz—' ANALYST APPROVED BY <br /> Clan J Cone JaP01G I Phillips <br /> I ' <br /> "oratory Director <br /> I , <br /> I <br /> t ' <br />