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Lancaster Analysis Report <br /> Laboratories <br /> 2425 New Holland Pike PO Box 12425 Lancaster PA 17605ax 717-65fr26 <br /> 2425•777 656 2300 F81 www lanCasterlabs Corn <br /> Page i of 4 <br /> Quality Control Summary <br /> Client Name Chevron Group Number 976102 <br /> Reported 02/09/06 at 10 48 AM <br /> Matrix QC may not be reported if site-specific QC samples were not <br /> submitted In these situations, to demonstrate precision and accuracy at <br /> a batch level a LCS/LCSD was performed, unless otherwise specified in the <br /> method <br /> Laboratory Compliance Quality Control <br /> Blank Blank Report LCS LCSD LCS/LCSD RPD RPp Max <br /> Analysis Name exult MDL Units %REC $RtC LlmX e <br /> Batch number 060300003A Sample number(s) 4698480-4698487 59-131 J 20 <br /> TPH-DRO CALUFT(Waters) N D 50 1.19/1 84 85 <br /> Batch number 0603OA20A Sample number(s) 4698479 4698481 4698483,4698465,4698487 5 30 <br /> TPH-GRO - Waters N D 50 ug/l 104 110 70-130 <br /> Batch number06030B20A Sample numbers) 4698480,4698482,4698484 4698486 4698488 30 <br /> TPH-GRO - Waters N A 50 ug/1 114 104 70-130 <br /> Batch number 060330027A Sample numberts) 4698484-4698487 eo-120 <br /> handl (by Direct In3ectacn) N D 200 ug/l 96 <br /> Sch number P060341AA S aUmple numbers) 4698484-4698747 30-155 <br /> Ethanol 005 ug/l 95 77-127 <br /> Methyl Tertiary Butyl Ether N D 0 5 ug/1 B3 67-130 <br /> di-Isopropyl ether 0 5 ug/l 87 74-120 <br /> Ethyl t-butyl ether N D 79-113 <br /> t-Amyl methyl ether N D 0 5 ug/1 92 60-133 <br /> t-Butyl alcohol N D 5 ug/l 92 85-117 <br /> Benzene N D 0 5 ug/1 90 77-132 <br /> 1,2-1)2chloroethane N D 0 5 ug/l 95 85-115 <br /> Toluene N D 0 5 ug/l 93 <br /> ND 0 5 ug/1 95 81-114 <br /> 1 2-Dibromoethane N D 0 5 ug/l 94 82-119 <br /> Ethylbenzene N D 0 5 ug/l 96 63-113 <br /> Xylene (Total) <br /> Batch number Z060372AA Sample number(s) 4698479-4698483 4696488 73-119 <br /> Methyl Tertiary Butyl Ether N D 0 5 ug/l 111 85-3I7 <br /> Benzene N D 0 5 ug/l 101 85-115 <br /> Toluene N D <br /> 0 5 ug/l 107 82_119 <br /> Ethylbenzene N D 0 5 ug/l 107 83-113 <br /> Xylene {Total} N D 0 5 ug/l 109 <br /> Sample Matrix Quality Control <br /> Unspiked (UNSPK) = the sample used in con unction with the matrix spike <br /> Background (BKG) = the sample used in conjunction with the duplicate DUP Dup RPD <br /> MS MSD MS/MSA RPD BKG DUP <br /> Anal szs Name %REC %REC Limits RPD MAX Conc <br /> Co nc RPD Max <br /> Batch number 0603OA20A Sample number(s) 4696479,4698461 4698463 4698485,4698467 UNSPK P696242 <br /> TPH-GRO - Waters 101 63-154 <br /> Batch number 0603OB20A Sample number(s) 4698480,4698482 4698484 4696486,4696488 UNSPR P696143 <br /> TPH-GRO - Waters 63-154 <br /> *-Outside of specification <br /> 10The result for one or both determinations was less than five times the LOQ <br /> 2) The background result was more than four times the spike added <br />