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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: 1083631 <br /> Reported: 04/09/08 at 08:17 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 /> Ammonia Nitrogen N.D. 200. ug/1 96 96 91-100 0 1 <br /> Batch number: 08094020201A Sample number(s) : 5315709 <br /> Alkalinity to pH 4.5 N.D. 460. ug/1 as 101 98-103 <br /> CaCO3 <br /> Batch number: 08095028001A Sample number(s) : 5315709 <br /> Specific Conductance N.D. 1.7 umhos/c 101 98-106 <br /> m <br /> Batch number: 080990000A Sample number(s) : 5315707 <br /> TPH-DRO(C10-C25)Water w/ SiGel N.D. 29. ug/1 66 68 45-114 2 20 <br /> Batch number: C080951AA Sample number(s) : 5315706-5315709 <br /> Benzene N.D. 0.1 ug/1 102 101 87-111 1 30 <br /> Toluene N.D. 1. ug/1 101 100 89-113 0 30 <br /> Ethylbenzene N.D. 1. ug/1 101 100 88-114 1 30 <br /> Xylene (Total) N.D. 1. ug/1 102 101 88-115 1 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 %aREC %REC Limits RPD MAX Conc Conc RPD Max <br /> Batch number: 08088196101A Sample number(s) 5315709 UNSPK: P315722 BKG: P315722 <br /> Chloride 110 90-110 548,000. 545,000. 0 20 <br /> Sulfate 105 90-110 520,000. 510,000. 2 (1) 20 <br /> Nitrate Nitrogen 97 90-110 18,900. 18,900. 0 20 <br /> Nitrite Nitrogen 110 90-110 N.D. N.D. 0 (1) 20 <br /> Batch number: 080901848003 Sample number(s) : 5315709 UNSPK: P313496 BKG: P313496 <br /> Calcium 183 (2) 61 (2) 75-125 4 20 108,000. 104,000. 4 20 <br /> Iron 108 98 75-125 4 20 1,500. 1,440. 4 20 <br /> Magnesium 147 (2) 81 (2) 75-125 5 20 25,000. 24,000. 4 20 <br /> Potassium 122 104 75-125 4 20 11,600. 11,000. 5 20 <br /> Sodium 316 (2) 284 (2) 75-125 0 20 301,000. 300,000. 0 20 <br /> Manganese 110 97 75-125 4 20 1,020. 983. 4 20 <br /> Boron 103 101 88-111 2 20 13.5 12.5 8 (1) 20 <br /> Batch number: 08091108101B Sample number(s) : 5315709 UNSPK: P315555 BKG: P315555 <br /> Kjeldahl Nitrogen 97 90-110 N.D. N.D. 0 (1) 20 <br /> Batch number: 08092021201A Sample number(s) 5315709 UNSPK: P314481 EKG: P314481 <br /> Total Dissolved Solids 96 98 54-143 1 12 1,250,000. 1,210,000. 3 9 <br /> Batch number: 08092110101B Sample number(s) : 5315709 UNSPK: 5315709 BKG: 5315709 <br /> Total Phosphorus as PO4 water 107 90-110 1,300. 1,400. 8* (1) 3 <br /> Batch number: 08093022101A Sample number(s) : 5315709 BKG: P317810 <br /> Ammonia Nitrogen 5,400. 5,400. 0 2 <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 />