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Sequoia 819 Striker Avenue Suite 8 <br /> Sacramento CA 95834 <br /> (916)921-9600 <br /> Analytical FAX(916)92 1-0100 <br /> &6bk international Client project 16 ARCO 20§3, Tracy, CA Sampled Jun 21, 199 - <br /> 19912 Business Park Dr, Ste 100 Sample Matrix Air Received Jun 21, 1999, <br /> ,.Sacramento, CA 95827 Analysis Method EPA 5030/8015/8020 Reported Jul 7, 1999, <br /> ,'Attention Rusty Benkosky First Sample# S906340 -01 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX I MTBE <br /> Reporting Sample Sample Sample <br /> Analyte Limit I D. ID ID <br /> mg/m' S906340-01 S906340-02 BLK062399 <br /> Influent Effluent Method Blank <br /> Furgeable <br /> Hydrocarbons 10 52 N D N D <br /> Benzene 0 050 019 N D N D <br /> Toluene 0 050 020 N D N D <br /> Ethyl Benzene 0 050 020 N D N D <br /> Total Xylenes 0 050 31 012 N D <br /> MTBE 050 N D N D N D <br /> chromatogram Pattern Unidentified -- -- <br /> Hydrocarbons <br /> C6-12 <br /> Quality Control Data <br /> Reporting Limit <br /> Multiplication Factor 2 0 1 0 10 <br /> Date Analyzed 06/23/99 06/23/99 06/23/99 <br /> Instrument Identification HP-2 HP-2 HP-2 <br /> Surrogate Recovery, % 95 92 96 <br /> (QC Limits= 70-130%) <br /> Purgeable Hydrocarbons are quantitated against a fresh gasoline standard <br /> Analytes reported as N 0 were not detected at or above the reporting lirnrt <br /> SEQUOIA ANALYTICAL, FLAP#1271 <br /> 5--Zit }r:1[�'�C lb- "J`mfr <br /> ndra R Hanson <br /> 'A?nagenSacramento Laboratory <br /> 5906340 SES <1 n <br />