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1 <br /> CASTLE ANALYTICAL LABORATORY <br />' Environmental Testing Services 2333 Shuttle Drive Atwater CA 95301 Phone (209)384-2930 <br /> Fax (209)384-1507 <br /> Acsvanced GeoEnwronmental, Inc Client Project ID Cai Fuels Method EPA 5030/8260 <br />' of Northern California Reference Number 4310 Instrument ID MP 5972MS <br /> 837 Shaw Road Matrix Water Prepared 12-28-01 <br /> Stockton, CA 95215 Analyst Clan J Cone Analyzed 12-28-01 <br /> Attn Tim Cuellar Reported 01-04-02 <br /> QUALITY CONTROL DATA REPORT <br />' SPIKE ID VWMS-D281 <br /> Reporting BLANK Spiking Control %R <br />' Limit Result Level Spike Limits <br /> Fi !L u /L }1 IL %R <br /> COMPOUNDS <br /> t-Butyi Alcohol(t-BA) 24 ND _ 750 115% 70-130 <br />' <br /> Methyl t-bu i ether (MTBE) 050 ND 250 121% 70-130 <br /> Dasa rap i ether(DIPE) 050 ND 250 114% 70-130 <br /> Eth I t-Bu i ether(ETRE) 050 ND 250 109% 70-130 <br /> t-Am I methyl ether(TAME) 0 50 ND 250 116% 70-130 <br /> 1 2-Dichicroethane 1 2-DCA 050 ND 250 120% 70-130 <br /> Ethylene dibromide(EDB) 0 50 ND 250 107% 70-130 <br /> Surrogates <br /> 1 2-Dichloroethane-d4 10 105% 100 115% 70-130 <br /> Toluene-d8 10 122% 100 115% 70 130 <br /> Spiking MATRIX MATRIX %R %RPD <br />' Level SPIKE SPIKE DUP Limits <br /> N /L %R %R <br /> COMPOUNDS <br /> t-Sut l Alcohol(t-BA 750 114% 141% 70-130 207% <br />' <br /> Methyl t-butt ether (MTBE) 2 50 124% 118% 70-130 4510 <br /> Diisoprop l ether(DIPE) 2 50 132% 120% 70-130 940% <br /> Eth l t-Bu f ether(ETBE) 250 129% 117% 70-130 965% <br />' It-Amyl methyl ether(TAME) 250 122% 113% 70-130 734% <br /> 1,2-Dichioroethane(1 2-DCA) 2 50 131% 118% 70-130 103% <br /> Elh iene d:bromide(EDB) 2 50 112% 111% 70-130 0719% <br /> Surrogate <br />' 1 2-1)ichloroethane-d4 11111 132% 120% 1 70-130 930% <br /> Toluene-d8 100 112% 114% 70-130 1 33% <br /> The LCS (Laboratory Check Sample) is a rontrol sample Or 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 °/o recovery is used for validation <br /> of sample batch results Due to matrix effects,the QC limits and recoveries for MS/MSD's are advisory only and are not used to accept or <br /> reject batch results <br /> &�—ANALYST APPROVED BY G14 <br />' Clan J Cone Ja hrllrps <br /> "lloratory Director <br /> 1 <br />