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i <br /> ' Sequoia 885 Jarvis Drive <br /> ` Morgan Hill CA 95037 <br /> (408) 776-9600 <br /> qW Analytical FAX(408) 782-6308 <br /> GroundZero Anal)sis Inc Project Knowles Rock Sampled 6/21/99 <br /> 1714 Main St Project Number 96-163 Received 6/22/99 <br /> ' Escalon,CA 95320 Project Manager Justin Powers Reported 7/2/99 <br /> Total Purgeable Hydrocarbons(C6-C12)and BTEX in Air(ppmv)by DHS LUFP/Quality Control <br /> Sequoia Analytical-Morgan Hill <br /> ' Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> ' Batch 9060276 Hate Prepared 6/23/99 Extraction Method EPA 5030E IPITI <br /> Blank 9060276-BLK 1 <br /> Purgeable Hydrocarbons 6/23/99 ND ppmv 280 <br /> Benzene ND 00160 <br /> Toluene ND 00130 <br /> EthylbenzEne ND 00120 <br /> Xylenes(total) __ _ _ _ _ _ _ ND_ _ 00120 <br /> ' Surrogate a a a-D rJhorotoluene _ " 00100 r 000950 �" � 700-130 95 0 <br /> b <br /> JP,q—,oi,Analytical-Morgan Hill *Refer to end of report for text of notes and definitions <br /> ' Page 5 of 6 <br />