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' TLE ANALYTICAL LABORATORY <br /> nmental 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 7093(1-20) Instrument ID HP 5972 MS <br /> 837 Shaw Road Sample Description Water Prepared 07-02-04 <br /> Stockton CA 95215 Analyst Scott Foster Analyzed 07-02-04 <br /> Attn Tim Cuellar Reported 07-07-04 <br /> QUALITY CONTROL DATA REPORT <br /> SPIKE ID VWMS-7024 <br /> Reporting BLANK Spiking Control %R <br /> Limit Result Level Spike Limits <br /> NIL /L /L %R <br /> OMPOUNDS <br /> t-But gA� ohol(t BA) 20 ND 750 817% 553-153 <br /> elhI ether MTBE) 0 50 ND 250 816% 604- 137 <br /> iisother DIPE) 050 ND 250 868% 705- 131 <br /> Eth I ether ETBE) 050 ND 250 904% 721 - 131 <br /> t-Amyl methyl ether(TAME) 050 ND 250 90% 71 7- 119 <br /> dr 2-Dichloroethane(1 2-DCA) 050 ND 250 105% 636- 138 <br /> th lene dibromide(EDB) 050 ND 250 996% 667- 129 <br /> urro ates <br /> 1 2 Dichloroethane-d4 1 0 910% 100 104% 592- 135 <br /> e-d8 1 0 103% ion 95 5% 629- 132 <br /> Spiking MATRIX MATRIX %R %RPD <br /> Level SPIKE SPIKE DUP Limits <br /> 1L %R %R <br /> OMPOUNDS <br /> t-But I Alcohol (t-BA) 750 <br /> 877% 898% 553-153 234% <br /> eth i t-but I ether (MTBE) 250 968% 940% 604-137 290% <br /> use rop l ether(DIPE) 250 101% 100% 705- 131 0375% <br /> thy[t-But I ether(ETBE) 250 104% 102% 721 -131 193% <br /> t-Am I methyl ether(TAME) 2 50 960% 936% 717-119 232% <br /> 2-Drchloroethane (1 2-DCA) 2 50 118% 114% 636-138 299% <br /> th lene dibromide(EDB) 250 112% 108% 667-129 394% <br /> Surro ate <br /> 1 2 Drchloroethane-d4 100 106% 101% 592-135 503% <br /> oEuene-d8 100 118% 105% 629-132 115% <br /> The LCS(Laboratory Check Sample) is a control sample of known interferent free matrix that is fortified with representative analytes and <br /> nalyzed using the same reagents preparation and analytical methods employed for the samples The LCS%recovery is used for validation <br /> f 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 />—AN <br /> (� <br /> ' ANALYST APPROVED BY <br /> Clary J Cone Ja s Phillips <br /> La ratory Director <br />