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Lancaster <br /> Laboratories Analysis Report <br /> 2425 New Holland Pike,PO Box 12425,Lancaster,PA 17605-2425-717-656-2300 Fax:717-656-2681•www.larcasterIabs.com <br /> Page 2 of 4 <br /> Quality Control Summary <br /> Client Name: Chevron Environmental Mgt. Co. Group Number: 1121775 <br /> Reported: 12/10/08 at 02:30 PM <br /> Laboratory Compliance Quality Control <br /> Blank Blank Report LCS LCSD LCS/LCSD <br /> Analysis Name Result Program Units %REC %REC Limits RPD RPD Max <br /> RL <br /> Batch number: 08339022101A Sample number(s) : 5540037 <br /> Ammonia Nitrogen N.D. 200. ug/l 96 91-100 <br /> Batch number: 08339110101A Sample number(s) : 5540037 <br /> Total Phosphorus as PO4 water N.D. 250. ug/l 96 90-110 <br /> Batch number: 08340108101A Sample number(s) : 5540037 <br /> Kjeldahl Nitrogen N.D. 500. ug/l 106 90-110 <br /> Batch number: G083381AA Sample number(s) : 5540037-5540038 <br /> Benzene N.D. 0.1 ug/l 103 87-111 <br /> Toluene N.D. 1. ug/l 102 89-113 <br /> Ethylbenzene N.D. 1. ug/l 102 88-114 <br /> Xylene (Total) N.D. 1. ug/l 102 88-115 <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/MSD RPD BKG DUP DUP Dup RPD <br /> Analysis Name %REC %REC Limits RPD MAX Conc Conc RPD Max <br /> Batchnumber: 08330196103A Sample number(s) : 5540037 UNSPK: 5540037 BKG: 5540037 <br /> Chloride 104 90-110 326,000 329,000 1 20 <br /> Sulfate 98 90-110 197,000 193,000 2 20 <br /> Nitrate Nitrogen 100 90-110 10,600 10,400 2 20 <br /> Nitrite Nitrogen 119* 90-110 N.D. N.D. 0 (1) 20 <br /> Batch number: 08331028001B Sample number(s) : 5540037 BKG: P539556 <br /> Specific Conductance 129,000 129,000 0 1 <br /> Batch number: 083311848002 Sample number(s) : 5540037 UNSPK: P539738 BKG: P539738 <br /> Calcium 102 (2) 102 (2) 75-125 0 20 20,600 20,600 0 20 <br /> Iron 121 (2) -97 (2) 75-125 4 20 61,200 62,700 2 20 <br /> Magnesium 112 (2) 108 (2) 75-125 0 20 18,700 18,900 1 20 <br /> Potassium 117 (2) 105 (2) 75-125 2 20 16,400 16,300 0 20 <br /> Sodium 110 (2) 80 (2) 75-125 1 20 77,800 79,000 1 20 <br /> Manganese 99 94 75-125 2 20 1,030 1,050 3 20 <br /> Boron 102 102 88-111 0 20 20.1 17.4 14 (1) 20 <br /> Batch number: 08331WABO26 Sample number(s) : 5540037 UNSPK: P539185 <br /> Naphthalene 77 73 70-130 5 30 <br /> Acenaphthylene 87 88 70-130 1 30 <br /> Acenaphthene 83 87 70-130 5 30 <br /> Fluorene 90 89 70-130 0 30 <br /> Phenanthrene 95 94 70-130 1 30 <br /> Anthracene 49* 56* 70-130 13 30 <br /> Fluoranthene 89 86 70-130 3 30 <br /> Pyrene 73 82 70-130 11 30 <br /> Benzo(a)anthracene 77 82 70-130 6 30 <br /> *-Outside of specification <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 />