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� Lancaster <br /> A Laboratories Analysis Report <br /> ' 2425 New Holland Pike,PO Boa 12425,Lancaster.PA 17605-2425•717-656-2300 Fax:717-656-2681•www.lancasterlabs.com <br /> Page 2 of 3 <br /> ' Quality Control Summary <br /> Client Name: Chevron Environmental Mgt. Co. Group Number: 1022934 <br /> Reported: 02/08/07 at 11:27 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 /> Ammonia Nitrogen N.D. 200. ug/1 97 97 91-100 1 1 <br /> Batch number: 07031108101A Sample number(s) : 4965595 <br /> Kjeldahl Nitrogen N.D. 500. ug/1 102 90-110 <br /> ' Batch number: 07031109101A Sample number(s): 4965595 <br /> Total Phosphorus as P (water) N.D. 80. ug/l 103 90-110 <br /> Batch number: 070330004A Sample number(s) : 4965595 <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 BRG DUP DUP Dup RPD <br /> Analysis Name %REC %REC Limits RPD MAX Conc Conc RPD Max <br /> Batch number: 07025028002A Sample number(s) : 4965595 BKG: 4965595 <br /> Specific Conductance 1,880. 1,880. 0 1 <br /> Batch number: 07025196601B Sample number(s) : 4965595 UNSPK: P965581 BKG: P965581 <br /> Chloride 115* 90-110 58,700. 50,700. 15* (1) 3 <br /> Sulfate 98 90-110 37,000. 36,400. 2 3 <br /> ' Nitrate Nitrogen 114* 90-110 7,400. 7,300. 1 2 <br /> Nitrite Nitrogen 117* 90-110 N.D. N.D. 0 (1) 20 <br /> Batch number: 07026021201A Sample number(s) : 4965595 UNSPK: P966149 BKG: P966149 <br /> Total Dissolved Solids 97 97 60-140 0 5 397,000. 389,000. 2 5 <br /> ' Batch number: 070261848001 Sample number(s) : 4965595 UNSPK: P965585 BKG: P965585 <br /> Calcium (2) (2) 75-125 3 20 55,100. 56,700. 3 20 <br /> Iron 99 100 75-125 1 20 N.D. N.D. 36* (1) 20 <br /> Magnesium (2) (2) 75-125 2 20 30,000. 29,800. 1 20 <br /> Potassium 104 101 75-125 1 20 4,820. 4,820. 0 20 <br /> ' Sodium (2) (2) 75-125 3 20 26,500. 27,100. 2 20 <br /> Manganese 99 99 75-125 0 20 N.D. 1.4 200* (1) 20 <br /> Boron 98 98 88-111 0 20 18.0 15.7 13 (1) 20 <br /> Batch number: 07030020201A Sample number(s) : 4965595 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: 07030022101A Sample number(s) : 4965595 BKG: P965327 <br /> Ammonia Nitrogen 30,200. 29,800. 1 2 <br /> ' Batch number: 07031108101A Sample number(s) : 4965595 UNSPK: P968932 BKG: P968932 <br /> Kjeldahl Nitrogen 48* 90-110 .7,600. 6,500. 15* 4 <br /> Batch number: 07031109101A Sample number(s) : 4965595 UNSPK: P966483 BKG: P966483 <br /> Total Phosphorus as P (water) 100 90-110 500. 500. 1 (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 />