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PRECISION <br /> ENVIRO-TECH <br /> Analytical Laboratory CERTIFICATE OFANAL YS* <br /> � I 4 <br /> Monday,'March 22, 20 <br /> Attention Rita Koehnen ' <br /> Port of Stockton � Report Page 7 of8 <br /> 2209 W Washington St <br /> Stockton, CA 95203 <br /> Volatile Organic Compounds by EPA Method 8260B- Quality Control <br /> Precision Enviro-Tech <br /> Reporting Spike Source %REC RPD ' <br /> Analyte Result Lima Units Level Result %REC Limits RPD Limit Notes <br /> Batch AC42211 -Volatiles <br /> LCS(AC42211-BS1) Prepared 01-Mar-04 Analyzed 11-Mar-04 ' <br /> Benzene 153 1 00 ugll 160 96 88-124 <br /> Ethylbenzene 183 1 00 160 114 88-124 t <br /> Toluene 164 1 00 160 '102 88-124 ' <br /> m p-Xylene 332 1 00 320 104 88-124 <br /> o-Xylene 170 1 00 160 106 88-124 <br /> Surrogate Dibromofluoromeihane 938 100 94 86-118 ' <br /> Surrogate Toluene-d8 925 100 92 88-110 <br /> Surrogate 4-Bromofluorobenzene 988 100 99 86-115 <br /> Matrix Spike(AC4221I-MSI) Source 0400750-04 Prepared 01-Mar-04 Analyzed 12-Mar-04 <br /> Benzene _ 14 2 1 00 ugA 160 ND 89 88-124 <br /> Ethylbenzene 145 1 00 160 ND 91 88-124 <br /> Toluene 160 1 00 160 0 590 96 88-124 <br /> m p-Xylene 31 5 1 00 320 1 05 95 88-124 <br /> 0-Xylene 142 1 00 160 ND 89 88-124 <br /> Surrogate Dibromofluoromethane 920 T 10 0 9 20 — 0-86-7118— <br /> Surrogate <br /> 86-118Surrogate Toluene-d8 9 25 10 0 935 NR 88-110 <br /> - - - .-„W_- -- --- - <br /> Surragate 4-BrBomafluorobenzene-� - � -T" 9 80 �' � �� X10 0 F- 70 1� �l NRS 86-1I5W- --- " - -- T _ -T <br /> Matrix Spike Dup(AC42211-MSD1)' -- --- =Source 0400750-04---- -Prepared&Analyzed 01-Mar-04 --- - - - -_ <br /> Benzene 142 1 00 ug/1 160 ND 89 88-124 0 15 ' <br /> Ethylbenzene 152 1 00 160 ND 95 88-124 5 15 <br /> Toluene 164 1 00 160 0 590 '99 88-124 2 15 <br /> in p-Xylene 335 1 00 320 1 05 101 88-124 6 15 <br /> 0-Xylene 146 1 00 160 ND 91 88-124 3 15 ' <br /> Surrogate Dibromofluoromethane 9 00 100 920 NR 86-118 <br /> Surrogate Toluene-d8 910 100 935 NR 88-110 <br /> Surrogate 4-Bromofluorobenzene 9 78 100 101 NR- 86-115 <br /> mg L=moflr,rams pc r I ncr=ppm IULR—Detcctton Lmut for Purposc of kcportrng ' <br /> ug'] =micrograms per Liter—ppb Exccptronai sample matrices Or rntcrfcrcncet may <br /> result to htghcrdeucrion bnuts <br /> RESPECTFULLY SUBMITTED, <br /> Jonathan Le, Laboratory Director , <br /> 7743 N Wes! Latae Suite B2 rStocklon CA 95210 , phone (209) 477-8105 Fax (209) 477-8148 <br />