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Lancaster <br />. Laboratories Analysis Report 4 � <br />2425 New Hd iand Pike, PO Box 12425, Lancaster, PA 17606.2425 1717-656.2300 Fax: 717-656-2661 • W WW.laneasteriabs.com <br />Page 4 of 8 <br />Quality Control Summary <br />Client Name: ChevronTexaco Group Number: 861370 <br />Reported: 08/13/03 at 03:24 PM <br />Sample Matrix Quality Control <br />MS MSD. MS/MSD RPD BKG DUP <br />Analysis Name <br />%RECREC <br />34-163 <br />Limits <br />RPD <br />MAX, Cone Conc <br />Benzene <br />104 <br />106 <br />83-128 <br />2 <br />30 <br />1,2-Dichloroethane <br />114 <br />115 <br />73-136 <br />1 <br />30 <br />Toluene <br />111 <br />111 <br />83-127 <br />0 <br />30 <br />1,2-Dibromoethane <br />104 <br />101 <br />78-120 <br />2 <br />30 <br />Ethylbenzene <br />113 <br />111 <br />82-134 <br />1 <br />30 <br />Xylene (Total) <br />113 <br />112 <br />82-130 <br />1 <br />30 <br />Batch number: P032211AB <br />Ethanol <br />Methyl.Tertiary Butyl Ether <br />di -Isopropyl ether <br />Ethyl t -butyl ether <br />t -Amyl methyl ether <br />t -Butyl alcohol <br />Benzene <br />1,2-Dichloroethane <br />Toluene <br />1,2-Dibromoethane <br />Ethylbenzene <br />Xylene (Total) <br />Batch number: P032231AA <br />Ethanol <br />Methyl Tertiary Butyl Ether <br />di -Isopropyl ether <br />Ethyl t -butyl ether <br />t -Amyl methyl ether <br />t -Butyl alcohol <br />Benzene <br />1,2-Dichloroethane <br />Toluene <br />1,2-Dibromoethane <br />Ethylbenzene <br />Xylene (Total) <br />Batch number: P032231AB, <br />Methyl Tertiary Butyl Ether <br />Ethyl t -butyl ether <br />Analysis Name: TPH-GRO - Waters <br />Batch number; 03213A16A <br />Trifluorotoluene-F <br />Sample number(s): 4092036-4092037 <br />96 <br />101 <br />34-163 <br />5 <br />30 <br />102 <br />101 <br />69-134 <br />2 <br />30 <br />100 <br />102 <br />75-130 <br />2 <br />30 <br />104 <br />105 <br />73-123 <br />1 <br />30 <br />109 <br />114 <br />77-117 <br />5 <br />30 <br />133 <br />138 <br />39-155 <br />4 <br />30 <br />104 <br />106 <br />83-12B <br />2 <br />30 <br />114 <br />115 <br />73-136 <br />1 <br />30 <br />111 <br />111 <br />83-127 <br />0 <br />30 <br />104 <br />101 <br />78-120 <br />2 <br />30 <br />113 <br />111 <br />82-134 <br />1 <br />30 <br />113 <br />112 <br />82-130 <br />1 <br />30 <br />Sample number(s). 4092038-4092045 <br />95 <br />100 <br />34-163 <br />6 30 <br />102 <br />110 <br />69-134 <br />7 30 <br />101 <br />102 <br />75-130 <br />1 30 <br />105 <br />103 <br />73-123 <br />2 30 <br />115 <br />109 <br />77-117 <br />5 30 <br />139 <br />144 <br />39-155 <br />3 30 <br />106 <br />105 <br />83-128 <br />1- 30 <br />113 <br />111 <br />73-136 <br />2 30 <br />107 <br />108 <br />83-127 <br />1 30 <br />101 <br />101 <br />78-120 <br />1 30 <br />109 <br />112 <br />82-134 <br />3 30 <br />ill <br />113 <br />82-130 <br />2 30 <br />Sample <br />number(s): 4092043 <br />102 <br />110 <br />69-134 <br />7 30 <br />105 <br />103 <br />73-123 <br />2 30 <br />Surrogate Quality Control <br />DUP Dup <br />RPD <br />_RED max <br />4092037 <br />111 <br />4092038 <br />112 <br />4092039 <br />108 <br />4092040 <br />111 <br />4092041. <br />110 <br />4092042 <br />109 <br />4092043 <br />114 <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 />