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<br /> Page 3 of 7
<br /> Quality Control Summary
<br /> Client Name: Chevron Environmental Mgt. Co. Group Number: 872354
<br /> Reported: 12/03/03 at 08:58 AM
<br /> Sample Matrix Quality Control
<br /> MS MSD MS/MSD RPD BKG DUP DUP Dup
<br /> RPD
<br /> Analysis Name %REC %REC Limits RPD MAX Conc Conc RPD Max
<br /> Ethylbenzene 89 89 73-105 0 30
<br /> Total Xylenes 90 90 75-105 0 30
<br /> Batch number: 03302A31B Sample number(s) : 4151547-4151548,4151559-4151562
<br /> Benzene 86 87 67-102 0 30
<br /> Toluene 89 89 72-104 0 30
<br /> Ethylbenzene 89 89 73-105 0 30
<br /> Total Xylenes 90 90 75-105 0 30
<br /> Batch number: 03302A34A Sample number(s) : 4151563-4151568
<br /> Benzene 85 88 67-102 3 30
<br /> Toluene 85 89 72-104 4 30
<br /> Ethylbenzene 87 90 73-105 4 30
<br /> Total Xylenes 87 91 75-105 4 30
<br /> Batch number: 03302SLB026 Sample number(s) : 4151561-4151569
<br /> Naphthalene 74 71 33-140 4 30
<br /> Acenaphthylene 63 66 53-123 4 30
<br /> Acenaphthene 67 67 29-139 0 30
<br /> Fluorene 66 64 26-153 2 30
<br /> Phenanthrene 70 72 56-123 2 30
<br /> Anthracene 87 90 55-129 4 30
<br /> Fluoranthene 74 69 16-175 8 30
<br /> Pyrene 77 84 4-190 7 30
<br /> Benzo(a)anthracene 66 61 50-140 7 30
<br /> Chrysene 93 87 36-144 7 30
<br /> Benzo(b)fluoranthene 67 67 17-166 1 30
<br /> Benzo(k)fluoranthene 66 66 4-177 1 30
<br /> Benzo(a)pyrene 55 46 14-168 13 30
<br /> Indeno(1,2,3-cd)pyrene 67 54 17-161 22 30
<br /> Dibenz(a,h)anthracene 64 51 49-130 21 30
<br /> Benzo(g,h,i)perylene 45 32 9-168 21 30
<br /> Surrogate Quality Control
<br /> Analysis Name: Custom TPH with Ranges (soil)
<br /> Batch number: 033010013A
<br /> Chlorobenzene Orthoterphenyl
<br /> 4151552 62 81
<br /> 4151553 59 76
<br /> 4151554 63 79
<br /> 4151555 65 73
<br /> 4151556 52 71
<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.
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