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680 Chesapeake Dnvc Redwood City,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> Sequoia <br /> 404 N Wiget Fane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Striker Avenue,Suite a Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> 'Ground Zero analysis Client Project 10 95-006/Knowles /Roek Sampled Oct 12, 1995 <br /> 3422 W Hammer Lane, #C-294 Sample Matrix Air Received Oct 12, 1995 <br /> Stockton, CA 95219 Analysis Method I=PA 5030/8015/8020 Reported Oct 17, 1995 <br /> Attention Justin Power First Sample # 510-0549 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BT <br /> EX DISTINCTION <br /> Reporting Sample Sample Sample <br /> Analyte Limit I D In I D <br /> mg/m3 510-0549 510-0550 510-0551 <br /> l ' KR VW KRVW- KRVW <br /> I 130 1120-Inf 1120-Etf <br /> i <br /> Purgeable <br /> ' Hydrocarbons 50 20,000 31 000 84 <br /> Benzene 0 050 1,,,00 1,500 28 <br /> Toluene 0 050 1,400 1,300 78 <br /> Ethyl Benzene 0 050 150 140 044 <br /> Total Xylenes 0 050 560 530 22 <br /> Chromatogram Pattern Gasoline Gasoline Gasoline <br /> 106-1012 C6-C12 C6 C12 <br /> I <br /> I <br /> Quality Control Data <br /> Report Limit Multiplication Factor 200 200 33 <br /> Date Analyzed 10/13/95 10/13/95 10/13/95 <br /> Instrument Identification GCHP-2 GCHP-1 GCHP-1 <br /> Surrogate Recovery, % 121 103 106 <br /> (QC Limits = 70-130%) <br /> Purgea6le Hydrocarbons are quantitated against a trash gasoline standard <br /> Analytes reported as N D were not detected at or above the reporting limit <br /> EQUOIA ANALYTICAL, FLAP #1624 <br /> Janet rlan <br /> Project Manager <br /> 5100549 GZA <1> <br />