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CE <br />M <br />Laabo ator <br />Lies <br />Page 4 of 5 <br />Quality Control Summary <br />Client Name ChevronTexaco Group Number 837261 <br />Reported 01/23/03 at 02 23 PM <br />Surrogate Quality Control <br />3975445 <br />101 <br />3975446 <br />102 <br />3975447 <br />102 <br />3975448 <br />99 <br />Blank <br />98 <br />LCS <br />98 <br />MS <br />99 <br />MSD <br />100 <br />Limits 72-128 <br />80-120 <br />88-110 <br />Analysis Name BTEX + Oxygenates by 82608 <br />Analysis Name BTEX + Oxygenates by <br />8260E <br />Batch number N030102AA <br />Batch number N030102AB <br />Dibromofluoromethane 1 2-Dachloroethane-d4 <br />Toluene -d8 <br />4-Bromofluorobenzene <br />3975445 101 100 <br />96 <br />93 <br />3975446 98 97 <br />97 <br />94 <br />Blank 99 97 <br />97 <br />93 <br />LCS 97 99 <br />99 <br />99 <br />98 99 <br />99 <br />101 <br />97 99 <br />100 <br />100 <br />Limits 86-118 <br />80-120 <br />88-110 <br />86-115 <br />Analysis Name BTEX + Oxygenates by <br />8260E <br />Batch number N030102AB <br />Dibromofluoromethane <br />1,2-Dichloroethane-d4 <br />Toluene -d8 <br />4-Bromofluorobenzene <br />3975448 99 <br />97 <br />98 <br />94 <br />Blank 101 <br />96 <br />96 <br />93 <br />LCS 97 <br />99 <br />99 <br />99 <br />MS 98 <br />99 <br />99 <br />101 <br />MSD 97 <br />99 <br />100 <br />100 <br />Limits 86-118 <br />80-120 <br />88-110 <br />86-115 <br />Analysis Name BTEX + Oxygenates by <br />8260B <br />Batch number N030102AC <br />Dibromofluoromethane <br />1,2-Dichloroethane-d4 <br />Toluene -d8 <br />4-Bromofluorobenzene <br />3975449 97 <br />97 <br />96 <br />95 <br />Blank 96 <br />96 <br />98 <br />96 <br />LCS 97 <br />99 <br />99 <br />99 <br />MS 98 <br />99 <br />99 <br />101 <br />MSD 97 <br />99 <br />100 <br />100 <br />Limits 86-118 80-120 88-110 86-115 <br />Analysis Name BTEX + Oxygenates by 6260B <br />Batch number N030121AA <br />*- Outside of specification <br />46 The result for one or both deterrmnations was less than five times the LOQ <br />The background result was more than four times the spike added <br />Lancaster Laboratories Inc <br />M E M B IH R 2425 New Holland Pike <br />PO Box 12425 <br />Lancaster 17605-2 <br />717 555 230000 Fax 717-67-6 <br />56 7681 <br />,Ila D— 1n r7lnI <br />