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1 <br />' CASTLE ANALYTICAL LABORATORY <br /> i Environmental Testing Services 2333 Shuttle Drive,Atwater CA 95301 Phone (209)384-2930 <br />' Fax (209)384-1507 <br /> Advanced GeoEnvironmentai, Inc Client Project ID Pacific Car Wash Method EPA 5030/8260 <br /> of Northern California Reference Number 3867 Instrument ID MP Series It <br />' 837 Shaw Road Matrix Water Prepared 7-2-01 <br /> Stockton CA 95215 Analyst Clan J Cone Analyzed 7-2-01 <br /> Attn Tim Cuellar Reported 7-12-01 <br /> QUALITY CONTROL DATA REPORT <br />' SPIKE ID VWMS-7021 <br /> Reporting BLANK Spiking Control %R <br />' Limit Result Level Spike Limits <br /> IL IL IL %R <br /> COMPOUNDS <br /> t-But I Alcohol(t-BA) 080 NO 750 121% 70-130 <br />' <br /> Methyl t-but I ether (MTBE) 0 010 ND 250 916% 70-130 <br /> Dnsoprop i ether DIPE 0 010 ND 250 91 2% 70-130 <br /> Ethyl t-Butyl ether ETBE 0 010 ND 250 940% 70-130 <br /> t-Am I methyl ether(TAME) 0 010 NO 250 944% 70-130 <br />' 1,2-Dichloroethane 1 2-DCA) 0 010 ND 250 976% 70-130 <br /> Ethylene dibromtde EDB 0 010 ND 250 110% 70-130 <br /> Surrogates <br /> 1 2-Dichloroethane-d4 0 010 834% 100 106% 70-130 <br /> Ile Toluene-d8 0 010 780% 100 101% 70-130 <br /> Spiking MATRIX MATRIX %R %RPD <br />' Level SPIKE SPIKE DUP Limits <br /> /L %R %R <br /> COMPOUNDS <br /> t-But I Alcohol(t-BA) 750 921% 105% 70-130 130% <br />' <br /> Methyl t-but I ether MTBE 250 772% 788% 70-130 144% <br /> Dasa rop I ether(DIPE) 250 872% 892% 70-130 226% <br /> Ethyl t-But I ether(ETBE) 250 912% 940% 70-130 302% <br /> t-Am 1 methyl ether TAME 250 932% 940% 70-130 0855% <br /> 1 2-Dichloroethane(1,2-DCA) 250 884% 932% 70-130 259% <br /> Ethylene dibromide(EDB 250 104% 104% 70-130 000% <br /> Surrogate <br /> 1 2-Dichloroethane-d4 10 0 102% 101% 70-130 1 480!° <br /> Toluene-d8 100 999% 962% 70-130 3 77% <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 MSIMSD's are advisory only and are not used to accept or <br /> reject batch results <br /> ANALYST APPROVED BY <br /> J ane Jam C Phillips <br /> La ratory Director <br />