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Lancaster Laboratories <br />Where quality is a science. <br />Quality Control Summary <br />Client: Name: ChevronTexaco <br />Group <br />Number: <br />829798 <br />Reported: 11/14/02 at <br />05:12 FM <br />.5 <br />ug/l <br />97 <br />77-127 <br />Laboratory Compliance Quality <br />Control <br />AAalveie, <br />Blank Blank <br />Report LCIS <br />LCS0 <br />LCB/LCSD <br />ams <br />Reault W1r. <br />Units ARB- <br />$= <br />Limits <br />Batch number: 02316A53A <br />Sample number(s): <br />3935265-3935269 <br />N.D. <br />5. <br />TPH-GRO - Waters <br />N.D. 50. <br />u9/1 109 <br />107 <br />74-116 <br />Batch number: 023170018A <br />Methanol (by Direct Injection) <br />Batch number: N023131AA <br />Ethanol <br />Methyl t -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 />501 <br />Analysis Name <br />Batch number: 02316A53A <br />TPH-GRO - Waters <br />Batch number: 023170018A <br />Methanol (by Direct Injection) <br />Batch number: B023131AA <br />Ethanol <br />Methyl t -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 />Analysis Name: TPH-GRO - Waters <br />Batch number: 02316A53A <br />Sample number(s): 3935265-3935269 <br />N.D. 200, ug/l 84 ° 64-130 <br />Sample aumber(e): 3935265-3935269 <br />N.D. <br />50. <br />ug/1 <br />88 <br />43-159 <br />N.D. <br />.5 <br />ug/l <br />97 <br />77-127 <br />N.D. <br />.5 <br />ug/l <br />92 <br />74-125 <br />N.D. <br />.5 <br />ug/1 <br />89 <br />74-120 <br />N.D. <br />.5 <br />ug/1 <br />91 <br />71-114 <br />N.D. <br />5. <br />ug/1 <br />90 <br />59-139 <br />N.D. <br />.5 <br />u9/1 <br />104 <br />85-117 <br />N.D. <br />.5 <br />ug/l <br />102 <br />77-132 <br />N.D. <br />5 <br />ug/1 <br />105 <br />85-115 <br />N.D. <br />.5 <br />ug/1 <br />97 <br />81-114 <br />N.D. <br />.5 <br />ug/1 <br />107 <br />82-119 <br />N.D. <br />.5 <br />ug/l <br />106 <br />84-120 <br />3 <br />Sample Matrix Quality Control <br />MS MSD MS/MSD RPD BKG DIIP DIIP <br />%RRC %REC Limits RPD MAX Come <br />Sample number(s); 3935265-3935269 <br />96 102 74-132 7 30 <br />Sample number(s). 3935265-3935269 <br />Be 84 69-127 5 20 <br />Sample number(s): 3935265-3935269 <br />87 <br />84 <br />34-163 <br />4 <br />30 <br />94 <br />92 <br />69-134 <br />2 <br />30 <br />91 <br />89 <br />Se -133 <br />2 <br />3D <br />Be <br />85 <br />73-123 <br />3 <br />30 <br />90 <br />88 <br />69-118 <br />2 <br />30 <br />92 <br />90 <br />51-148 <br />2 <br />30 <br />108 <br />105 <br />78-134 <br />2 <br />30 <br />100 <br />98 <br />73-136 <br />2 <br />30 <br />110 <br />107 <br />83-127 <br />3 <br />30 <br />93 <br />91 <br />78-120 <br />2 <br />30 <br />110 <br />108 <br />82-134 <br />2 <br />30 <br />111 <br />107 <br />82-130 <br />4 <br />30 <br />Surrogate Quality Control <br />*- Outside of specification <br />_ ) The result for one or both determinations was less than tie times the LOQ. <br />The background result was more than four times the spike added. <br />Lancaster Laboratories, Inc. <br />M le M B E R 2425 New Holland Pike <br />®PO Box 12425 <br />Lancaster, PA 17605-2425 <br />717-656-2300 Fax, 717-656-2681 <br />Conc RPD <br />Page 1 of 2 <br />PD ERR Max <br />30 <br />Dup <br />RPD <br />Ki <br />2216 Rev. 9/11/00 <br />