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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: 1105078 <br /> Reported: 08/29/08 at 09:11 AM <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: 08228021202A Sample number(s) : 5439778 <br /> Total Dissolved Solids N.D. 9700. ug/l 93 80-120 <br /> Batch number: 08229110101A Sample number(s) : 5439778 <br /> Total Phosphorus as PO4 water N.D. 250. ug/l 103 90-110 <br /> Batchnumber: 08231020201A Sample number(s) : 5439778 <br /> Alkalinity to pH 4.5 N.D. 460. ug/l as 100 98-103 <br /> CaCO3 <br /> Batch number: 082350024A Sample number(s) : 5439777-5439778 <br /> TPH-DRO(C10-C25)Water w/ SiGel N.D. 32. ug/l 55 59 45-114 7 20 <br /> Batch number: L082272AA Sample number(s) : 5439776-5439778 <br /> Benzene N.D. 0.1 ug/l 99 101 87-111 2 30 <br /> Toluene N.D. 1. ug/1 100 102 89-113 1 30 <br /> Ethylbenzene N.D. 1. ug/l 103 103 88-114 0 30 <br /> Xylene (Total) N.D. 1. ug/l 105 105 88-115 0 30 <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 /> Batch number: 08226028001A Sample number(s) : 5439778 BKG: P438251 <br /> Specific Conductance 25,100. 25,100. 0 1 <br /> Batch number: 08226196601A Sample number(s) : 5439778 UNSPK: P438448 BKG: P438448 <br /> Chloride 118* 90-110 60,000. 62,800. 5 (1) 20 <br /> Sulfate 118* 90-110 509,000. 499,000. 2 20 <br /> Nitrate Nitrogen 103 90-110 770. 700. 10 (1) 20 <br /> Nitrite Nitrogen 98 90-110 N.D. 590. 200* (1) 20 <br /> Batch number: 08227022101A Sample number(s) : 5439778 UNSPK: P439899 BKG: P439899 <br /> Ammonia Nitrogen 92 92 64-128 1 8 1,400. 1,500. 6* (1) 2 <br /> Batch number: 08227108101A Sample number(s) : 5439778 UNSPK: P440432 BKG: P440432 <br /> Kjeldahl Nitrogen 114* 90-110 N.D. N.D. 0 (1) 20 <br /> Batch number: 082271848001 Sample number(s) : 5439778 UNSPK: P439972 BKG: P439972 <br /> Calcium 81 (2) 138 (2) 75-125 2 20 109,000. 111,000. 2 20 <br /> Iron 91 92 75-125 1 20 1,890. 1,910. 1 20 <br /> Magnesium 58 (2) 136 (2) 75-125 1 20 123,000. 125,000. 1 20 <br /> Potassium 134 (2) 139 (2) 75-125 0 20 51,500. 51,700. 0 20 <br /> Sodium -60 (2) 275 (2) 75-125 1 20 1,120,000. 1,140,000. 2 20 <br /> Manganese 87 (2) 91 (2) 75-125 1 20 2,510. 2,550. 1 20 <br /> Boron 93 100 88-111 5 20 682. 661. 3 (1) 20 <br /> Batch number: 08228021202A Sample number(s) : 5439778 UNSPK: P439796 BKG: P439796 <br /> Total Dissolved Solids 128 112 54-143 5 12 2,900,000. 3,040,000. 5 9 <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 />