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r LancasterAnalysis Report <br /> 1 Laboratories <br /> 2425 New Holland Pike,PO Boz 12425,Lancaster,PA 17605-2425.717-6562300 Fax:717-656-2681-www.laricasteriabs.com <br /> Page 17 of 21 <br /> Quality Control Summary <br /> Client Name: Chevron Group Number: 1210187 <br /> Reported: 09/14/10 at 04:55 PM <br /> Sample Matrix Quality Control <br /> Unspiked (UNSPX) - the sample used in conjunction with the matrix spike <br /> Background (EKG) - the sample used in conjunction with the duplicate <br /> MS KBD KS/MSD RPD BRG DUP DUP Dup RPD <br /> Analysis Name RBC 96REC to RPD MAX Conc Conc RPD Max <br /> p-Isopropyltoluene 100 104 76-123 3 30 <br /> Methyl Tertiary Butyl Ether 95 100 72-126 5 30 <br /> 4-Methyl-2-pentanone 93 100 63-123 7 30 <br /> Methylene Chloride 96 100 79-120 3 30 <br /> Naphthalene 88 95 52-125 7 30 <br /> n-Propylbenzene 108 111 74-134 3 30 <br /> Styrene 89 92 78-125 3 30 <br /> 1,1,1,2-Tetrachloroethane 86 88 82-119 2 30 <br /> 1,1,2,2-Tetrachloroethane 97 101 73-119 4 30 <br /> Tetrachloroethene 94 96 80-128 2 30 <br /> Toluene 98 101 80-125 3 30 <br /> 1,2,3-Trichlorobenzene 90 94 69-119 5 30 <br /> 1,2,4-Trichlorobenzene 91 95 70-124 5 30 <br /> 1,1,1-Trichloroethane 101 106 80-143 6 30 <br /> 1,1,2-Trichloroethane 93 95 77-124 2 30 <br /> Trichloroethene 99 102 88-133 3 30 <br /> ' Trichlorofluoromethane 107 107 73-152 1 30 <br /> 1,2,3-Trichloropropane 94 98 76-118 3 30 <br /> 1,2,4-Trimethylbenzene 99 104 72-130 5 30 <br /> 1,3,5-Trimethylbenzene 101 105 72-131 3 30 <br /> Vinyl Chloride 111 110 66-133 1 30 <br /> m+p-Xylene 96 98 79-125 2 30 <br /> o-Xylene 93 96 79-125 4 30 <br /> Batch number: 10246A07A Sample number(s) : 6075628-6075634 UNSPR: 6075628 <br /> TPH-ORO N. CA water C6-C12 91 63-154 <br /> Batch number: 10246A20A Sample number(s) : 6075589-6075607 UNSPX: 6075591 <br /> TPH-GRO N. CA water C6-C12 118 63-154 <br /> Batch number: 10251A07A Sample number(s) : 6075608-6075627 UNSPX: 6075608 <br /> ' TPH-GRO N. CA water C6-C12 127 63-154 <br /> 1 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: VOCs by 8260B(Extended) -Water <br /> Batch number: N102452AA <br /> Dibromofluoromethane 1,2-Dichloroethane-d4 Toluene-d8 4-Bromoflttorobenzene <br /> 6075589 105 106 98 87 <br /> 6075590 104 105 98 87 <br /> Blank 104 101 98 88 <br /> LCS 102 105 104 99 <br /> LCSD 103 103 103 99 <br /> MS 104 104 102 99 <br /> Limits: 80-116 77-113 80-113 78-113 <br /> *-Outside of specification <br /> **-This limit was used in the evaluation of the final result for the blank <br /> (1)The result for one or both determinations was less than five times the LOQ. <br /> (2)The unspiked result was more than four times the spike added. <br />