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Lancaster Laboratories <br />Where quality is a science. <br />Quality Control Summary <br />Page 6 of 7 <br />Client Name: Chevron Products Company Group Number: 787778 <br />Reported: 12/11/01 at 05:48 PM <br />Surrogate Quality Control <br />3733558 <br />93 <br />99 <br />3733559 <br />92 <br />97 <br />3733560 <br />95 <br />99 <br />3733561 <br />93 <br />99 <br />3733562 <br />93 <br />99 <br />3733563 <br />92 <br />99 <br />3733564 <br />89 <br />100 <br />3733565 <br />93 <br />97 <br />3733566 <br />93 <br />98 <br />Blank <br />92 <br />100 <br />LCS <br />106 <br />99 <br />LCSD <br />102 <br />99 <br />Limits: 65-137 <br />72-134 <br />Analysis Name: BTEX + Oxygenates by 8260B <br />Batch number: U013321AA <br />Dibromofluoromethane 1,2-Dichloroethane-d4 Toluene -d8 <br />4--Bromofluorobenzene <br />3733543 <br />96 <br />92 <br />98 <br />87 <br />3733544 <br />99 <br />95 <br />97 <br />87 <br />3733545 <br />97 <br />93 <br />99 <br />90 <br />3733546 <br />98 <br />94 <br />98 <br />87 <br />3733547 <br />99 <br />97 <br />99 <br />87 <br />33548 <br />98 <br />96 <br />96 <br />88 <br />33549 <br />99 <br />98 <br />99 <br />90 <br />33550 <br />99 <br />95 <br />97 <br />86 <br />Blank <br />93 <br />92 <br />96 <br />87 <br />LCS <br />98 <br />96 <br />97 <br />93 <br />MS <br />98 <br />97 <br />96 <br />92 <br />MSD <br />98 <br />94 <br />96 <br />95 <br />Limits: 86--118 80-120 88-110 86-115 <br />Analysis Name: BTEX + Oxygenates by 0260B <br />Batch number: U013321AB <br />Dibromofluoromethane 1,2-Dichloroethane-d4 Toluene -dB 4-Bromofluorobenzene <br />3733551 <br />95 <br />92 <br />99 <br />87 <br />3733552 <br />97 <br />94 <br />97 <br />87 <br />3733553 <br />98 <br />96 <br />98 <br />89 <br />3733554 <br />98 <br />98 <br />100 <br />87 <br />3733555 <br />99 <br />91 <br />98 <br />88 <br />3733556 <br />100 <br />93 <br />98 <br />87 <br />3733557 <br />99 <br />96 <br />98 <br />86 <br />3733558 <br />95 <br />98 <br />99 <br />89 <br />3733559 <br />100 <br />96 <br />98 <br />87 <br />3733560 <br />102 <br />96 <br />98 <br />86 <br />Blank <br />98 <br />93 <br />101 <br />87 <br />LCS <br />98 <br />96 <br />97 <br />93 <br />Ms <br />98 <br />97 <br />96 <br />92 <br />MSD <br />98 <br />94 <br />96 <br />95 <br />Limits: 86-118 <br />80-120 <br />88-110 <br />*- Outside of specification <br />The result for one or both determinations was less than five times the LOQ. <br />The background result was more than four times the spike added. <br />86-115 <br />Lancaster Laboratories, Inc. <br />M E M B E R 2425 New Holland Pike <br />P4 Box 12425 <br />Lancaster, 17605-2425 <br />717-656-230000 Fax: 717-656-2681 2216 Rev. 9111/00 <br />