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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.lancasterIabs.com <br /> Page 2 of 4 <br /> Quality Control Summary <br /> Client Name: Chevron Environmental Mgmt Co Group Number: 1171842 <br /> Reported: 12/07/09 at 08:17 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: 09324108101B Sample number(s) : 5842644 <br /> Kjeldahl Nitrogen N.D. 500. ug/1 95 90-110 <br /> Batch number: 09324110101B Sample number(s) : 5842644 <br /> Total Phosphorus as PO4 water N.D. 250. ug/1 104 89-110 <br /> Batch number: 09324021202A Sample number(s) : 5842644 <br /> Total Dissolved Solids N.D. 9700. ug/1 97 80-120 <br /> Batch number: 09328022101A Sample number(s) : 5842644 <br /> Ammonia Nitrogen N.D. 200. ug/1 93 92 85-105 1 5 <br /> Batch number: 09328028001A Sample number(s) : 5842644 <br /> Specific Conductance N.D. 1.7 umhos/c 100 98-106 <br /> m <br /> Batch number: 09329020201A Sample number(s) : 5842644 <br /> Alkalinity to pH 4.5 N.D. 460. ug/1 as 100 98-103 <br /> CaCO3 <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: G093281AA Sample number(s) 5842644-5842645 UNSPK: 5842644 <br /> Benzene 100 87-126 <br /> Ethylbenzene 105 80-140 <br /> Toluene 104 83-127 <br /> Xylene (Total) 104 84-125 <br /> Batch number: 093241848007 Sample number(s) 5842644 UNSPK: P842325 BKG: P842325 <br /> Boron 105 106 88-111 1 20 25.7 22.2 15 (1) 20 <br /> Calcium 110 (2) 105 (2) 75-125 1 20 22,200 22,700 2 20 <br /> Iron 70 (2) 96 (2) 75-125 4 20 6,120 6,180 1 20 <br /> Magnesium 99 102 75-125 1 20 7,060 7,190 2 20 <br /> Manganese 101 101 75-125 0 20 762 768 1 20 <br /> Potassium 105 104 75-125 0 20 1,830 1,790 2 (1) 20 <br /> Batch number: 093371848001 Sample number(s) 5842644 UNSPK: P842325 EKG: P842325 <br /> Sodium 101 109 75-125 5 20 4,960 4,850 2 (1) 20 <br /> Batch number: 09323196602B Sample number(s) 5842644 UNSPK: 5842644 BKG: 5842644 <br /> Chloride 113* 90-110 688,000 684,000 1 20 <br /> Nitrate Nitrogen 94 90-110 12,700 12,500 2 20 <br /> Nitrite Nitrogen 100 90-110 N.D. N.D. 0 (1) 20 <br /> Sulfate 103 90-110 713,000 713,000 0 (1) 20 <br /> Batch number: 09324108101B Sample number(s) 5842644 UNSPK: P841530 BKG: P841530 <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 />