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401Lancaster <br /> Laboratories Analysis Report <br /> 2425 New Holland Pike PO Bax 12425 Lancaster PA 17605.2425-717 656-2300 Fax 717-656.2681-www lancasterlabs com <br /> Page 1 of 4 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 918671 <br /> Reported 11/11/04 at 11 25 AM <br /> Matnx 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 LCSILCSD was performed,unless otherwise specified in the <br /> method <br /> Laboratory Compliance Quality Control <br /> Blank Blank Report LCS LcsD LC&/LCSD <br /> analysis Name Repu_lt ]IDL Units %REC REC £L mita M RPD Max <br /> Batch number 04305A16A Sample numberls) 4392285-4392286 <br /> TPH-GRO - Waters N D 50 ug/1 94 97 70-130 3 3D <br /> Batch number 04306112601A Sample number(s) 4392293 <br /> TRPH 418 1 N D 0 40 mg/l 81 83 54-113 3 14 <br /> Batch number 04306A16A Sample number(s) 4392284 <br /> TPH-GRO - Waters N D 50 ug/l 94 99 70-130 5 30 <br /> etch number 04307A16A Sample number(s) 4392287-4392293 <br /> PH-GRO - Waters N D 50 ug/l 98 99 70-130 1 30 <br /> Batch number 043090020A Sample number(s) 4392255-4392292 <br /> TPH-DRO CALUFT(Waters) N D 5o ug/l Be 64 61-126 4 20 <br /> Batch number 043110001A Sample number(s) 4392289-4392292 <br /> Methanol (by Direct Injection) N D 1000 ug/l 104 76-119 <br /> Batch number Z043232AA Sample number(s) 4392284-4392288,4392293 <br /> Methyl Tertiary Butyl Ether N D 2 ug/l 97 77-127 <br /> Benzene N D 5 ug/l 95 85-117 <br /> Toluene N D 5 ug/1 98 65-115 <br /> 8thylbenzene N D 5 ug/l 100 82-119 <br /> Xylene (Total) N D 5 ug/l 98 83-113 <br /> Batch number Z043242AA Sample number s) 4392289-4392292 <br /> Ethanol N D Soo ug/l 69 46-145 <br /> Methyl Tertiary Butyl Ether N D 2 ug/l 96 77-127 <br /> di-Isopropyl ether N D 2 ug/l 98 67-130 <br /> Ethyl t-butyl ether N D 2 ug/l 97 74-120 <br /> t-Amyl methyl ether N D 2 ug/l 95 79-113 <br /> t-Butyl alcohol N D 100 ug/l 91 57-141 <br /> Benzene N D 5 ug/1 96 85-117 <br /> 1,2-Dichloroethane N D 2 ug/l 110 77-132 <br /> Toluene N D 5 ug/1 98 85-115 <br /> 1,2-Dibromoethane N D 2 ug/1 96 81-114 <br /> Ethylbenzene N D 5 ug/l 101 82-119 <br /> Xylene (Total) N D 5 ug/l 99 83-113 <br /> sample Matrix Quality Control <br /> MS MSD NS/MSD RPD BRG DUP DVP Dup RPD <br /> *-Outside of specification <br /> (1) The result for one or both determinations was less than five times the LOQ <br /> 02) The background result was more than four times the spike added <br />