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Lancaster <br /> Laboratories Analysis Report <br /> -+ <br /> 2S New Holland Ptke PO Box 12425 Lancaster,PA 176052425•717-656-2300 Fax 717-656-2681•WWW lancasterlabs com <br /> Page 1 of 2 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 980923 <br /> Reported 03/13/06 at 05 22 PM <br /> Matrix QC may not be reported if site-specific QC samples were not <br /> submitted In these situations, to demonstrate precision and accuracy at <br /> a batch level, a LCS/LCSD was performed, unless otherwise specified in the <br /> method <br /> Laboratory Compliance Quality Control <br /> Blank Blank Report LCE LCSD LCS/LCSD <br /> Analysis Name Result MDL Units %REC %REC Limits RPA RPD Max <br /> Batch number 0606BA02A Sample number(s) 4724594 <br /> TPH-GRO - Soils N D 1 0 mg/kg 94 67-119 <br /> Batch number 060715708001 Sample number(s) 4724594 <br /> Lead N D 0 780 mg/kg 98 80-120 <br /> Batch number A060691AA Sample number(s) 4724594 <br /> Methyl Tertiary Butyl Ether N D 0 5 ug/kg 104 75-125 <br /> Benzene N D 0 5 ug/kg 110 77-119 <br /> Toluene N D 1 ug/kg 109 81-116 <br /> Ethylbenzene N D 1 ug/kg 111 82-115 <br /> Xylene (Total} N D 1 ug/kg 107 82-117 <br /> • Sample Matrix Quality Control <br /> unspiked (UNSPK) = the sample used in con3unction with the matrix spike <br /> Background (BKG) = the sample used in con3unction with the duplicate <br /> Ms MSD MS/MSD RPD EKG DUP DUP Dup RPD <br /> Analysis Name %REC %REC Limits RPD MAX Conc Conc RPD Max <br /> Batch number 06068A02A Sample number(s) 4724594 UNSPK P721827 <br /> TPH-GRO - Soils 77 81 39-118 5 30 <br /> Batch number 06071570BOOl Sample number(s) 4724594 UNSPK P724123 BKG P724123 <br /> Lead 90 103 75-125 5 20 19 0 18 9 1 20 <br /> Batch number A060691AA Sample number(s) 4724594 UNSPK P723160 <br /> Methyl Tertiary Butyl Ether 84 87 47-130 4 30 <br /> Benzene 99 101 59-120 2 30 <br /> Toluene 101 102 49-132 1 30 <br /> Ethylbenzene 100 102 50-127 2 30 <br /> Xylene (Total) 97 98 44-127 2 30 <br /> Surrogate Quality Control. <br /> Surrogate recoveries which are outside of the QC window are confirmed <br /> unless attributed to dilution or otherwise noted on the Analysis Report <br /> Analysis Name TPH-GRO - Soils <br /> Batch number 0606BA02A <br /> Trifluorotoluene-F <br /> *- Outside of specification <br /> (1) The result for one or both determinations was less than five tunes the LOQ <br /> 0) The background result was more than four times the splice added <br />