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Lancaster <br /> Laboratories Analysis Report <br /> 2425 New Holland Pike,PO Box 12425,Lancaster,PA 17605.2425•717-656-2300 Fax:717-656-2681-www.lancasterlabs.com <br /> Page 2 of 4 <br /> Quality Control Summary <br /> Client Name: Chevron Group Number: 1128686 <br /> Reported: 01/29/09 at 02 :12 PM <br /> Laboratory Compliance Quality Control <br /> Blank Blank Blank Report LCS LCSD LCS/LCSD <br /> Analysis Name Result MDL** LOQ Unite %REC %REC Limits RPD RPD Max <br /> 1,1,2,2-Tetrachloroethane N.D. 1. S ug/l 92 72-119 <br /> Bromobenzene N.D. 1. 5 ug/l 96 82-110 <br /> 1,2,3-Trichloropropane N.D. 1. 5 ug/l 100 78-117 <br /> n-Propylbenzene N.D. 1. 5 ug/1 102 78-119 <br /> 2-Chlorotoluene N.D. 1. 5 ug/l 97 78-115 <br /> 1,3,5-Trimethylbenzene N.D. 1. 5 ug/l 102 78-116 <br /> 4-Chlorotoluene N.D. 1. 5 ug/l 94 80-112 <br /> tert-Butylbenzene N.D. 1. 5 ug/l 99 74-114 <br /> 1,2,4-Trimethylbenzene N.D. 1. 5 ug/l 101 78-117 <br /> sec-Butylbenzene N.D. 1. 5 ug/l 101 72-120 <br /> p-Isopropyltoluene N.D. 1. 5 ug/l 101 72-118 <br /> 1,3-Dichlorobenzene N.D. 1. 5 ug/l 98 81-114 <br /> 1,4-Dichlorobenzene N.D. 1. 5 ug/l 96 84-116 <br /> n-Butylbenzene N.D. 1. 5 ug/l 98 75-120 <br /> 1,2-Dichlorobenzene N.D. 1. 5 ug/l 97 81-112 <br /> 1,2-Dibromo-3-chloropropane N.D. 2. 5 ug/l 97 65-121 <br /> 1,2,4-Trichlorobenzene N.D. 1. 5 ug/l 94 65-114 <br /> ' Hexachlorobutadiene N.D. 2. 5 ug/l 89 62-119 <br /> Naphthalene N.D. 1. 5 ug/l 92 61-116 <br /> 1,2,3-Trichlorcbenzene N.D. 1. 5 ug/1 90 67-114 <br /> Acetone N.D. 6. 20 ug/l 172 40-200 <br /> Carbon Disulfide N.D. 1. 5 ug/l 92 69-119 <br /> ' 2-Butanone N.D. 3. 10 ug/l 133 63-157 <br /> trans-1,3-Dichloropropene N.D. 1. 5 ug/l 98 79-114 <br /> cis-1,3-Dichloropropene N.D. 1. 5 ug/l 104 78-114 <br /> 4-Methyl-2-pentanone N.D. 3. 10 ug/l 105 63-126 <br /> 2-Hexanone N.D. 3. 10 ug/l 112 61-140 <br /> 2-Chloroethyl Vinyl Ether N.D. 2. 10 ug/l 104 51-142 <br /> Freon 113 N.D. 2. 10 ug/l 112 66-125 <br /> ' Sample Matrix Quality Control <br /> Unspiked (UNSPK) = the sample used in conjunction with the matrix spike <br /> Background (BKG) = the sample used in conjunction with the duplicate <br /> MS MSD MS/MSD RPD BKG DUP DUP Dup RPD <br /> Analysis Name %REC %REC Limits RPD MAX Conc Conc RPD Max <br /> Batch number: 09021B07A Sample number(s) : 5579890-5579891 UNSPK: P579274 <br /> TPH-GRO N. CA water C6-C12 109 63-154 <br /> Batch number: N090212AA Sample number(s) : 5579890-5579891 UNSPK: 5579891 <br /> Ethanol 75 73 32-164 2 30 <br /> Methyl Tertiary Butyl Ether 114 118 69-127 3 30 <br /> di-Isopropyl ether 108 114 68-129 6 30 <br /> Ethyl t-butyl ether 112 118 78-119 5 30 <br /> ' t-Amyl methyl ether 111 116 72-125 5 30 <br /> t-Butyl alcohol 93 99 70-121 7 30 <br /> Dichlorodifluoromethane 138 141 52-192 3 30 <br /> Chloromethane 119 125 58-157 5 30 <br /> Vinyl Chloride 113 120 68-147 5 30 <br /> ' Bromomethane 116 122 54-140 6 30 <br /> Chloroethane 118 121 60-140 2 30 <br /> *-Outside of specification <br /> ' **-This limit was used in the evaluation of the final result for the blank <br /> (1)The result for one or both determinations was less than five times the LOQ. <br /> (2)The unspiked result was more than four times the spike added. <br />