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**Lancaster <br /> Laboratories Analysis Report <br /> 2425 New H011and Pike,PO Box 12425,Lancaster.PA 17605-2425•717-658-2300 Fax:717-656-2681•www.lancastarlabs.com <br /> Page ] of 3 <br /> Quality Control Summary <br /> Client Name: ChevronTexaco Group Number: 890976 <br /> Reported: 04/16/04 at 09:37 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 <br /> Analysis Name Result ML Units %REC %RHC Limits RPD RPD Max <br /> Batch number: 040970000A Sample number(s) : 4249134 <br /> Total TPH N.D. 10, mg/kg 93 77-126 <br /> TPH Motor Oil C16-C36 N.D. 10. mg/kg <br /> Batch number: 040975708001 Sample number(s) : 4249134 <br /> Lead N.D. 0.790 mg/kg 97 86-109 <br /> Batch number: 04099A34A Sample number(s) : 4 24 9134 <br /> TPH-GRO - Soils N.D. 1.0 mg/kg 112 67-119 <br /> •Batch number: 041030001A Sample number(s) : 4249134 _ <br /> TPH - DRO CA LOFT (Soils) N.D. 10. mg/kg 90 56-118 <br /> Batch number: D041001AA Sample number(s) : 4249134 <br /> Methyl Tertiary Butyl Ether N.D. 0.5 ug/kg 86 75-125 <br /> di-Isopropyl ether N.D. 1. ug/kg 97 70-129 <br /> Ethyl t-butyl ether N.D. 1. ug/kg 95 71-124 <br /> t-Amyl methyl ether N.D. 1. ug/kg 95 74-117 <br /> t-Butyl alcohol N.D. 20. ug/kg 97 51-160 <br /> Benzene N.D. 0.5 ug/kg 98 83-118 <br /> 1,2-Dichloroethane N.D. 1. ug/kg 89 76-126 <br /> Toluene N.D. 1. ug/kg 96 81-116 <br /> 1,2-Dibromoethane N.D. 1. ug/kg 97 77-114 <br /> Ethylbenzene N.D. 1. ug/kg 95 82-115 <br /> Xylene (Total) N.D. 1. ug/kg 96 82-117 <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BKO DUP DUP Dup RPD <br /> Analysis_Name %REC RHC Limits RPD MAX Conc Conc RPD Max <br /> Batch number: 040970000A Sample number(s) : 4249134 <br /> Total TPH 143* 26-141 <br /> TPH Motor Oil C16-C36 12. N.D- 36* (l) 20 <br /> Batch number: 040975708001 Sample number(s) : 4249134 <br /> Lead 91 94 75-125 3 20 11.7 6.77 53* (1) 20 <br /> Batch number: 04099A34A Sample number(s) : 4249134 <br /> TPH-GRO - Soils 85 77 39-118 10 30 <br /> Batch number: 041030001A Sample number(s) . 4249134 <br /> *-Outside of specification <br /> (1) The 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 />