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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: 1029537 <br /> Reported: 03/26/07 at 10:32 AM <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: 070785708001 Sample number(s) : 5006059 UNSPK: P007211 BKG: P007211 <br /> Cadmium 96 99 75-125 2 20 0.570 0.572 0 (1) 20 <br /> Chromium 104 108 75-125 2 20 20.5 21.0 2 20 <br /> Lead 91 108 75-125 5 20 32.2 27.3 17 20 <br /> Nickel 99 101 75-125 1 20 9.67 9.81 1 20 <br /> Zinc 58* 62* 75-125 1 20 90.7 66.1 31* 20 <br /> Batch number: 07078SLB026 Sample number(s) : 5006057-5006058 UNSPK: 5006057 <br /> Naphthalene 90 83 53-124 8 30 <br /> Acenaphthylene 87 79 35-132 10 30 <br /> Acenaphthene 95 92 55-130 4 30 <br /> Fluorene 96 93 61-124 3 30 <br /> Phenanthrene 97 94 50-139 3 30 <br /> Anthracene 92 88 51-138 5 30 <br /> Fluoranthene 102 101 29-158 0 30 <br /> Pyrene 101 100 25-175 1 30 <br /> Benzo(a)anthracene 99 98 37-158 1 30 <br /> Chrysene 97 97 29-158 1 30 <br /> Benzo(b)fluoranthene 99 103 23-172 4 30 <br /> Benzo(k)fluoranthene 91 93 43-149 2 30 <br /> Benzo(a)pyrene 88 86 39-145 3 30 <br /> Indeno(1,2,3-cd)pyrene 83 84 36-152 2 30 <br /> Dibenz(a,h)anthracene 67 69 23-156 3 30 <br /> Benzo(g,h,i)perylene 84 86 11-164 2 30 <br /> Batch number: A070781AA Sample number(s) : 5006057-5006059 UNSPK: 5006058 <br /> Benzene 106 103 59-120 3 30 <br /> Toluene 104 102 38-131 2 30 <br /> Ethylbenzene 100 97 54-116 4 30 <br /> Xylene (Total) 102 99 44-127 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: Custom TPH with Ranges (soil) <br /> Batch number: 070780010A <br /> Chlorobenzene Orthoterphenyl <br /> 5006057 73 80 <br /> 5006058 80 99 <br /> 5006059 62 81 <br /> Blank 86 95 <br /> LCS 95 102 <br /> MS 86 87 <br /> MSD 81 117 <br /> Limits: 22-152 40-152 <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 />