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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 3 <br /> Quality Control Summary <br /> Client Name: Chevron Environmental Mgt. Co. Group Number: 1022750 <br /> Reported: 02/08/07 at 11:26 AM <br /> Laboratory Compliance Quality Control <br /> Blank Blank Report LCS LCSD LCS/LCSD <br /> Analysis Name Result MDL Units %REC %REC Limits RPD RPD Max <br /> Benzo(g,h,i)perylene N.D. 0.02 ug/l 98 96 74-117 2 30 <br /> Batch number: 07030020201A Sample number(s) : 4964678 <br /> Alkalinity to pH 4.5 99 98-103 <br /> Batch number: 07031110101A Sample number(s) : 4964678 <br /> Total Phosphorus as PO4 water N.D. 250. ug/1 106 90-110 <br /> Batch number: 070330004A Sample number(s) : 4964677-4964680 <br /> TPH-DRO(C10-C25)Water w/ SiGel N.D. 29. ug/1 80 83 43-122 3 20 <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: 07024196101B Sample number(s) : 4964678 UNSPK: 4964678 EKG: 4964678 <br /> Chloride 108 90-110 202,000. 201,000. 0 3 <br /> Sulfate 103 90-110 147,000. 145,000. 2 (1) 3 <br /> Nitrate Nitrogen 109 90-110 7,200. 7,200. 0 2 <br /> Nitrite Nitrogen 106 90-110 N.D. N.D. 0 (1) 20 <br /> Batch number: 07025021201A Sample number(s) : 4964678 UNSPK: 4964678 BKG: P965059 <br /> Total Dissolved Solids 110 103 60-140 3 5 8,060,00 7,690,00 5 5 <br /> 0. 0. <br /> Batch number: 07025022101A Sample number(s) : 4964678 BKG: P965152 <br /> Ammonia Nitrogen 36,900. 37,700. 2 2 <br /> Batch number: 07025028001A Sample number(s) : 4964678 BKG: P961119 <br /> Specific Conductance 1,670. 1,660. 0 1 <br /> Batch number: 07025108101A Sample number(s) : 4964678 UNSPK: P960915 BKG: P960915 <br /> Kjeldahl Nitrogen 121* 90-110 510. 590. 200* (1) 4 <br /> Batch number: 070251848001 Sample number(s) : 4964678 UNSPK: P964602 BKG: P964602 <br /> Calcium (2) (2) 75-125 1 20 71,200. 73,800. 4 20 <br /> Iron 97 99 75-125 1 20 N.D. N.D. -144 (1) 20 <br /> Magnesium (2) (2) 75-125 1 20 37,800. 39,000. 3 20 <br /> Potassium 109 110 75-125 0 20 4,640. 4,770. 3 20 <br /> Sodium (2) (2) 75-125 0 20 34,200. 35,200. 3 20 <br /> Manganese 100 101 75-125 0 20 202. 209. 3 20 <br /> Boron 100 100 88-111 1 20 56.3 57.0 1 (1) 20 <br /> Batch number: 07030020201A Sample number(s) : 4964678 UNSPK: P965581 BKG: P965581 <br /> Alkalinity to pH 8.3 N.D. N.D. 0 (1) 4 <br /> Alkalinity to pH 4.5 99 99 64-130 0 2 204,000. 204,000. 0 4 <br /> Batch number: 07031110101A Sample number(s) : 4964678 UNSPK: 4964678 EKG: 4964678 <br /> Total Phosphorus as PO4 water 105 90-110 N.D. N.D. 0 (1) 3 <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 />