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ti y Lancaster Laboratories Page 3 of 6 Where qua#i lis a science. Quality Control Summary Client Name: Chevron Products Company Group Number: 795493 Reported: 02/19/02 at 08 : 50 PM Sample Matrix Quality Control Ms MSD Ms/MSD RFD BKG DUP DAP Dup RPD Analysis Name 9REC %REC Limits RPD MAX Conc Conc RPD Max Ethanol -i 118 98 70-130 18 30 —' Methyl, t-butyl ether 92 92 69-134 1 30 di-Isopropyl ether 96 99 68-133 1 30 Ethyl t-butyl ether 90 89 73-123 1 30 t-Amyl methyl ether 89 91 69-118 1 30 t-Butyl alcohol 112 108 51-148 3 30 1,2-Dichloroethane 96 98 75-141 2 30 1,2-Dibromoethane 91 90 78-120 2 30 Batch number: V020362AB Sample number(s) : 3768302 Ethanol 118 98 70-130 18 30 Methyl t-butyl ether 92 92 69-134 1 30 di-Isopropyl ether 98 99 68-133 1 30 Ethyl t-butyl ether 90 89 73-123 1 30 t-Amyl methyl ether 89 91 69-118 1 30 t-Butyl alcohol 112 108 51-148 3 30 1,2-Dichloroethane 96 98 75-141 2 30 1,2-Dibromoethane 91 90 78-120 2 30 0 Surrogate g Quality Control Analysis Name: Methanol and Ethanol Batch number: 020360003A Acetone 3768293 108 3768294 106 3768295 109 3768296 105 3768297 107 3768298 105 3768299 117 3768300 105 3768301 108 Blank 104 LCS 105 M5 103 MSD 103 Limits: 72-128 Analysis Name: TPH Fuels by GC (waters) Batch number: 020360013A J036 Orthoterphenyl 3768293 91 3766294 94 3768295 91 *-Outside of specification The result for one or both determinations was less than five times the LOQ. The background result was more than four times the spike added. Lancaster Laboratories,Inc. M E M B E R 2425 New Holland Pike Bax 12425 La � Lancaster,PR 17605-2425 717-656-2300 Fax:717-656-2681 2216 Rev.9111/00