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FRIEDMAN & BRUYA, INC. <br /> ENVIRONMENTAL CHEMISTS <br /> Date of Report: 06/11/02 <br /> Date Received: 05/23/02 <br /> Project: 5011.001 (Roberts Property) <br /> QUALITY ASSURANCE RESULTS FOR THE ANALYSIS OF NATER <br /> SAMPLES FOR PNNS BY EPA METHOD 82700 SIM <br /> Laboratory Code: Laboratory Control Sample <br /> Percent Percent <br /> Reporting Spike Recovery Recovery Acceptance RPD <br /> Analyte Units Level LCS LCSD Criteria (Limit 20) <br /> Naphthalene }tg/L (ppb) 5 86 84 56.126 3 <br /> Acenaphthylene �tgIL(ppb) 5 102 104 61-128 3 <br /> Acenaphthene µglL(ppb) 5 90 88 63-124 3 <br /> Fluorene µglL(ppb) 5 102 98 64-130 4 <br /> Phenanthrene µglL (ppb) 5 87 87 69-124 0 <br /> Anthracene µg/l,(ppb) 5 108 108 68.122 0 <br /> Fluoranthene µglL (ppb) 5 95 96 73-129 1 <br /> Pyrene µglL (ppb) 5 94 95 68-125 1 <br /> Benzo(a)anthracene µglL(ppb) 5 81 79 69-122 1 <br /> Chrysene �zg1L(ppb) 5 85 84 68-122 0 <br /> Benzo(b)fluoranthene µg/l,(ppb) 5 86 87 67-132 1 <br /> Benzo(k)fluoranthene �Lg/L (ppb) 5 88 88 68-132 1 <br /> Benzo(a)pyrene µg/l, (ppb) 5 93 93 71-132 0 <br /> Indeno(1,2,3-cd)pyrene µg/l, (ppb) 5 97 97 58-130 0 <br /> Dibenz(a,h)anthracene 4glL (ppb) 5 98 98 59-137 0 <br /> Benzo(g,h,i)perylene µglL(ppb) 5 92 93 58.130 0 <br /> 11 <br />