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Lancaster Laboratories 4 <br /> Page 6 of 7 <br /> Where quality is a science <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 820390 <br /> Reported 09/10/02 at 03.59 PM <br /> Surrogate Quality Control <br /> Analysis Name TPH-GRO - Waters <br /> Batch number 02240ASIB <br /> Trafluorotoluene-F <br /> 3886115 98 <br /> 3886117 95 <br /> 3886118 117 <br /> Blank 94 <br /> LCS 105 <br /> LCSD 109 <br /> MS 114 <br /> Limits 57-146 <br /> Analysis Name TCL SW046 Semivolatiles/Waters <br /> Batch number 02240WAP026 <br /> 2-Fluorophenol Phenol-d6 2,4,6-Tribromophenol Nitrobenzene-d5 <br /> 3886115 55 41 75 80 <br /> Blank 58 43 75 81 <br /> LCS 59 43 77 81 <br /> MS 61 46 73 77 <br /> MSD 62 46 75 78 <br /> Limits 22-96 10-87 36-147 45-139 <br /> 2-Fluorobiphenyl Terphenyl-d14 <br /> 5 81 69 <br /> Blank • <br /> Blank 70 68 <br /> LCS 80 79 <br /> MS 76 78 <br /> MSD 78 79 <br /> Limits 61-119 46-136 <br /> Analysis Name BTEX + Oxygenates by 8260E <br /> Batch number N022413AB <br /> Dibromofluoromethane 1,2-Dichloroethane-d4 Toluene-de 4-Bromofluorobenzene <br /> 3886114 98 95 97 92 <br /> 3886117 99 95 97 92 <br /> 3886118 93 91 100 98 <br /> Blank 97 96 98 92 <br /> LCS 96 97 100 97 <br /> MS 97 96 100 98 <br /> MSD 96 95 100 98 <br /> Limits 86-118 80-120 88-110 86-115 <br /> Analysis Name EPA SW846/8260 (water) <br /> Batch number N022421AA <br /> Dibromofluoromethane 1,2-Dichloroethane-d4 Toluene-d8 4-Bromofluorobenzene <br /> 3886115 -92-- - -- - - - -91 - - — 98 -- - - 95 - <br /> Blank 96 94 98 93 <br /> LCS 95 94 100 98 <br /> MS 95 92 100 100 <br /> MSD 96 95 100 100 <br /> Limits 86-118 80-120 88-110 86-115 <br /> *- Outside of specification <br /> (1) The result for one or both determinations was less than five times the LOQ <br /> (2) The background result was more than four times the spike added <br /> Lancaster Laboratories Inc <br /> m 15 m a E R 2425 New Holland Pike <br />" PO Box 12425 <br /> t 0 Lancaster PA 17605 2425 <br /> 717 656 2300 Fax 717-656 2681 2216 Rev 9/11100 <br />