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Lancaster <br /> Laboratories Analysis Report <br /> 2425 Now Holland Pike, PO Box 12425,Lancaster,PA 17605-2425•717-656-2300 Fax:717-6562681•W Ww.lancasteflabs.com ' <br /> Page 10 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 (UNSPK) - the sample used in conjunction with the matrix spike , <br /> Background (BKG) = the sample used in conjunction with the duplicate <br /> MS MSD MS/MBD RPD BEG DOP DDP Dup RPD <br /> Anelvele Nems $RRC $RBC Limits RPD NU Conc one RPD Max <br /> Ieopropylbenzene 110 75-128 ' <br /> p-Isopropyltoluene 103 76-123 <br /> Methyl Tertiary Butyl Ether 103 72-126 <br /> 4-Methyl-2-pentanone 98 63-123 <br /> Methylene Chloride 106 79-120 <br /> Naphthalene 79 52-125 <br /> n-Propylbenzene 107 74-134 , <br /> Styrene 108 78-125 <br /> 1,1,1,2-Tetrachloroethane 108 82-119 <br /> 1,1,2,2-Tetrachloroethane 102 73-119 <br /> Tetrachloroethene 115 80-128 <br /> Toluene 110 80-125 , <br /> 1,2,3-Trichlorobenzene 94 69-119 <br /> 1,2,4-Trichlorobenzene 93 70-124 <br /> 1,1,1-Trichloroethane 114 80-143 <br /> 1,1,2-Trichloroethane 108 77-124 <br /> Trichloroethene 114 88-133 , <br /> Trichlorofluoromethane 114 73-152 <br /> 1,2,3-Trichloropropane 103 76-118 <br /> 1,2,4-Trimethylbenzene 106 72-130 <br /> 1,3,5-Trimethylbenzene 105 72-131 <br /> Vinyl Chloride 100 66-133 ' <br /> m+p-Xylene 112 79-125 <br /> o-Xylene 109 79-125 <br /> Batch number: N102465AA Sample number(s) : 6075619-6075622 UNSPK: 6075619 <br /> Acetone 113 109 52-139 4 30 ' <br /> t-Amyl methyl ether 98 95 75-122 3 30 <br /> Benzene 103 100 80-126 2 30 <br /> Bromobenzene 106 104 82-115 2 30 <br /> Bromochloromethaae 111 97 83-123 13 30 <br /> Bromodichloromethane 97 95 78-125 2 30 ' <br /> Bromoform 79 77 60-121 3 30 <br /> Bromomethane 77 70 38-149 9 30 <br /> 2-Butanone 95 92 57-138 3 30 <br /> t-Butyl alcohol 105 104 67-119 2 30 <br /> n-Butylbenzene 100 103 73-128 3 30 , <br /> sec-Butylbenzene 102 103 79-125 1 30 <br /> tert-Butylbenzene 108 105 81-121 3 30 <br /> Carbon Disulfide 72 72 67-135 0 30 <br /> Carbon Tetrachloride 105 103 81-138 2 30 <br /> Chlorobenzene 108 105 87-124 3 30 <br /> Chloroethane 92 85 51-145 9 30 <br /> 2-Chloroethyl Vinyl Ether 0* 0* 10-151 0 30 <br /> Chloroform 105 102 81-134 3 30 <br /> Chloromethane 107 96 67-154 11 30 <br /> 2-Chlorotoluene 107 104 82-118 3 30 <br /> 4-Chlorotoluene 106 102 84-122 3 30 <br /> 1,2-Dibromo-3-chloropropene 82 77 66-121 6 30 <br /> Dibromochloromethane 90 89 74-116 1 30 <br /> 1,2-Dibromoethane 102 99 77-116 3 30 <br /> Dibromomethane 101 99 83-119 2 30 , <br /> 1,2-Dichlorobenzene 105 102 84-119 2 30 <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 theLOQ. <br /> (2)The unspiked result was more than four times the spike added. <br />