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FREEDMAN & BRUYA, INC. <br /> ENVIRONMENTAL CHEMISTS <br /> Date of Report: 06/11/02 <br /> Date Received: 05/24/02 <br /> Project: 5011.001 (Roberts Property) <br /> QUALITY ASSURANCE RESULTS FOR THE ANALYSIS OF SOIL SAMPLES <br /> FOR PNA'S BY EPA METHOD 8270C SIM <br /> Laboratory Cade: Laboratory Control Sample <br /> Percent Percent <br /> Reporting Spike Recovery Recovery Acceptance RPD <br /> Analyte Units Level LCS LCSD Criteria (Limit 20) <br /> Naphthalene ug/kg (ppb) 170 88 87 58-121 0 <br /> Acenaphthylene ug/kg (ppb) 170 101 100 54.122 1 <br /> Acenaphthene µg/kg (ppb) 170 90 94 58-119 0 <br /> Fluorene µg/kg(ppb) 170 94 91 57.122 3 <br /> Phenanthrene µg/kg(ppb) 170 85 85 57.123 1 <br /> Anthracene µg/kg (ppb) 170 94 94 44.125 1 <br /> Fluoranthene µg/kg (ppb) 170 93 95 54-127 1 <br /> Pyrene µg/kg (ppb) 170 92 93 56.123 2 <br /> Benz(a)anthracene µg/kg(ppb) 170 76 75 50-124 1 <br /> Chrysene µg/kg(ppb) 170 81 82 51-122 1 <br /> Benzo(b)fluoranthene µg/kg(ppb) 170 80 80 44.149 1 <br /> Benzo(k)fluoranthene µg/kg (ppb) 170 90 92 52-140 2 <br /> Benzo(a)pyrene µg/kg (ppb) 170 88 88 42.129 0 <br /> Indeno(1,2,3-cd)pyrene µg/kg (ppb) 170 99 98 48-134 1 <br /> Dibenzo(a,h)anthracene µgfkg(ppb) 170 101 100 49-135 1 <br /> Benzo(g,h,i)perylene µgfkg(ppb) 170 94 93 46.134 1 <br /> 37 <br />