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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 3 of 5 <br /> Quality Control Summary <br /> Client Name: Chevron Environmental Mgt. Co. Group Number: 1079257 <br /> Reported: 03/14/08 at 12:09 PM <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 /> Indeno(1,2,3-cd)pyrene 66* 68* 70-130 3 30 <br /> Dibenz(a,h)anthracene 74 73 70-130 2 30 <br /> Benzo(g,h,i)perylene 42* 41* 70-130 5 30 <br /> Batch number: 08063108101A Sample number(s) 5289748 UNSPK: P289234 BKG: P289234 <br /> Kjeldahl Nitrogen 99 90-110 N.D. N.D. 0 (1) 20 <br /> Batch number: 08063110101A Sample number(s) 5289748 UNSPK: P291225 EKG: P291225 <br /> Total Phosphorus as PO4 water 99 90-110 470. 480. 2 (1) 3 <br /> Batch number: 080631848001 Sample number(s) 5289748 UNSPK: P289847 EKG: P289847 <br /> Calcium 178 (2) 111 (2) 75-125 2 20 121,000. 123,000. 1 20 <br /> Iron 110 104 75-125 2 20 2,050. 2,080. 2 20 <br /> Magnesium 176 (2) 107 (2) 75-125 2 20 54,500. 55,200. 1 20 <br /> Potassium 110 106 75-125 1 20 4,540. 4,570. 0 20 <br /> Sodium 152 (2) 128 (2) 75-125 1 20 77,900. 76,700. 2 20 <br /> Manganese 103 102 75-125 1 20 284. 288. 1 20 <br /> Boron 103 103 88-111 0 20 217. 217. 0 (1) 20 <br /> Batch number: 08064020201A Sample number(s) 5289748 UNSPK: P289595 EKG: P289595 <br /> Alkalinity to pH 8.3 N.D. N.D. 0 (1) 4 <br /> Alkalinity to pH 4.5 79 77 64-130 1 2 103,000. 104,000. 1 4 <br /> Batch number: 08065022101A Sample number(s) : 5289748 BKG: P290773 <br /> Ammonia Nitrogen 28,000. 27,800. 1 2 <br /> Batch number: 08067028001A Sample number(s) : 5289748 BKG: 5289748 <br /> Specific Conductance 1,480. 1,480. 0 1 <br /> Batch number: C080661AA Sample number(s) : 5289741-5289749 UNSPK: 5289744 <br /> Benzene 100 102 85-126 2 30 <br /> Toluene 104 108 94-128 4 30 <br /> Ethylbenzene 103 106 96-128 2 30 <br /> Xylene (Total) 101 104 91-126 3 30 <br /> Surrogate Quality Control <br /> Surrogate recoveries which are outside of the QC window are confirmed <br /> unless attributed to dilution or otherwise noted on the Analysis Report. <br /> Analysis Name: TPH-DRO (C10-C25) Water <br /> Batch number: 080610008A <br /> Orthoterphenyl <br /> 5289742 87 <br /> 5289743 92 <br /> 5289744 84 <br /> 5289745 110 <br /> 5289746 103 <br /> 5289747 86 <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 />