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N <br />Quality Control Summary <br />Page 3 of 7 <br />Client Name: Chevron <br />Products Company <br />Group Number: 806252 <br />Reported: 05/23/02 at <br />11:16 AM <br />Sample <br />Matrix <br />Quality Control <br />MS <br />MSD <br />MS/MSD <br />RPD BKO DUP DUp <br />Analysis Name <br />96REC <br />96REC <br />Limits <br />RPD MAX Conc Cone RPD <br />Methyl t -butyl ether <br />101 <br />99 <br />69-134 <br />2 <br />'Yo— <br />0di-Isopropyl <br />di-Isopropylether <br />104 <br />102 <br />68-133 <br />1 <br />30 <br />Ethyl t -butyl ether <br />103 <br />101 <br />73-123 <br />2 <br />30 <br />t -Amyl methyl ether <br />100 <br />100 <br />69-118 <br />1 <br />30 <br />t -Butyl alcohol <br />106 <br />104 <br />51-148 <br />2 <br />30 <br />Benzene <br />108 <br />106 <br />78-134 <br />2 <br />30 <br />1,2-Dichloroethane <br />112 <br />104 <br />75-141 <br />8 <br />30 <br />Toluene <br />95 <br />96 <br />78-133 <br />0 <br />30 <br />1,2-Dibromoethane <br />68 <br />91 <br />78-120 <br />3 <br />30 <br />Ethylbenzene <br />99 <br />99 <br />82-134 <br />0 <br />30 <br />Xylene (Total) <br />96 <br />98 <br />81-136 <br />2 <br />30 <br />Batch number: U021262AA <br />Sample <br />number(s): 3814508--3814511,3814514 <br />Ethanol <br />115 <br />113 <br />70-130 <br />2 <br />30 <br />Methyl t -butyl ether <br />(2) <br />(2) <br />69-134 <br />3 <br />30 <br />di -Isopropyl ether <br />109 <br />108 <br />68-133 <br />1 <br />30 <br />Ethyl t -butyl ether <br />102 <br />104 <br />73-123 <br />1 <br />30 <br />t -Amyl methyl ether <br />98 <br />98 <br />69-118 <br />0 <br />30 <br />t -Butyl alcohol <br />122 <br />122 <br />51-148 <br />0 <br />30 <br />Benzene <br />110 <br />107 <br />78-134 <br />3 <br />30 <br />1,2-Dichloroethane <br />115 <br />106 <br />75-141 <br />8 <br />30 <br />Toluene <br />105 <br />109 <br />78-133 <br />4 <br />30 <br />1,2-Dibromoethane <br />100 <br />100 <br />78-120 <br />1 <br />30 <br />Ethylbenzene <br />111 <br />111 <br />82-134 <br />0 <br />30 <br />Xylene (Total) <br />109 <br />110 <br />81-136 <br />1 <br />30 <br />Batch number: U021262AB <br />Sample <br />number(s): <br />3814512-3814513,3814515-3814517 <br />Ethanol <br />115 <br />113 <br />70-130 <br />2 <br />30 <br />Methyl t -butyl ether <br />(2) <br />(2) <br />69-134 <br />3 <br />30 <br />di -Isopropyl ether <br />109 <br />108 <br />68-133 <br />1 <br />30 <br />Ethyl t -butyl ether <br />102 <br />104 <br />73-123 <br />1 <br />30 <br />t -Amyl methyl ether <br />98 <br />98 <br />69-118 <br />0 <br />30 <br />t -Butyl alcohol <br />122 <br />122 <br />51-148 <br />0 <br />30 <br />Benzene <br />110 <br />107 <br />78-134 <br />3 <br />30 <br />1,2-Dichloroethane <br />115 <br />106 <br />75-141 <br />B <br />30 <br />Toluene <br />105 <br />109 <br />78-133 <br />4 <br />30 <br />1,2-Dibromoethane <br />100 <br />100 <br />78-120 <br />1 <br />30 <br />Ethylbenzene <br />111 <br />111 <br />82-134 <br />0 <br />30 <br />Xylene (Total) <br />109 <br />110 <br />81-136 <br />1 <br />30 <br />Surrogate Quality Control <br />Analysis Name: TPH-GRO - Waters <br />Batch number: 02124A53C <br />Trifluorotoluene-F <br />3814507 100 <br />3814508 97 <br />3814509 94 <br />3814510 98 <br />Blank 97 <br />LCS 107 <br />LCSD 106 <br />MS 108 <br />Limits: 67-135 <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 />Dup <br />RPD <br />Max <br />