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PRECISION <br /> • � E1WIR0-TECH <br /> Analytical Laboratory CERTIFICATE OF ANALYSIS <br /> Thursday,January 20,2005 <br /> Attention: Abby Racco <br /> Nell O.Anderson &Associate Report page 7 of 12 <br /> 902 Industrial Way <br /> Lodi, CA 95240 <br /> Trihalomethanes by EPA Method 524.1- Quality Control <br /> Precision Enviro-Tech <br /> Reporting Spike Source -/.RFC RPD <br /> Analyte Result limit Units Level Result %R1iC Limits RPD Limit Notes <br /> Batch AA51306-Volatiles <br /> Blank(AA51306-BLKI) Prepared&Analyzed: 13-Jan-05 <br /> Bromodichlmometlimc ND 0.500 uo <br /> Bromoform ND 0.500 " <br /> Chloroform No 0.500 " <br /> Dibromoc ommethane ND 0.500 " <br /> Surrogate:4-BromoJluorobentene 8.60 8.00 108 75-115 <br /> Surrogate:1,2-Dichlorobenzene-d4 8.70 8.00 109 75-115 <br /> LCS(AA51306-BSI) Prepared&Analyzed: 13-Jan-05 <br /> Bromodichloromethme 20.2 0.500 119/1 19.0 106 75-115 <br /> Brotnofomi 18.2 0.500 19.0 96 75-115 <br /> bloroform 20.8 0.500 19.0 109 75-115 <br /> ibromochlammethme 19.4 0.500 19.0 102 75-115 <br /> Surrogate:4-Bromojluorobemene, 7.95 8.00 99 75-115 <br /> Surrogate:1,2-Dichlorobenzene-d4 8.22 8.00 103 75-115 <br /> LCS Dup(AA51306-BSDS) _ Prepared&Analyzed: 13-San-05 <br /> Bromodichloromethme 20.9 0.500 UO 19.0 110 75-115 3 20 <br /> Bromaform 18.5 0.500 " 19.0 97 75-115 2 20 <br /> Chloroform 18.5 0.500 " 19.0 97 75.115 12 20 <br /> Dibromochlmomethane 19.9 0.500 19.0 105 75-115 3 20 <br /> Surrogate:4-Bromgfluorobenzene 7.87 8.00 98 75-115 <br /> Surrogate:1,2-Dich1orohenzem&4 8.21 8.00 103 75-115 <br /> _Reference(AA51306-SRM]) Prepared&Analyzed: 13-Jan-05 _ <br /> Bromodichloromethane 19.1 0.500 ugh 19.0 101 0-200 <br /> Bromoform 19.1 0.500 19.0 101 0-200 <br /> Chloroform 19.2 0.500 19.0 101 0-200 <br /> Dihromochloromethanc 19.4 0.500 19.0 102 0-200 <br /> Surrogate:4-Bromofluorobenzem 781 8.00 98 75-115 <br /> Surrogate:1,2-Dichlorobenzene-d4 8.08 8.00 101 75-115 <br /> mg'L=mdligramsperbur-ppm DLR=lkrealm Lmftforpurpasc ofReporttng. <br /> ug& mwmgramsperL/ter=ppb gxceptionolsomple mmricer or interferences may <br /> remit in nigher detedian limite. <br /> RESPECTFULLY SUBMITTED, <br /> Jonathan Le,Laboratory Director <br /> 7743 N. West Lane. Suite B2 Stockton CA. 95210 Dhone: (209) 477-8105 Fax: (209) 477-8148 <br />