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Superior PreCision Ana1YVCa/, /roc. <br /> A member of ESSCON Environmental Support Service Consortium <br /> EPA SW-846 Method 8260 volatile Organics by GC/MS <br /> Quality Assurance and Control Data <br /> Laboratory Number 81274 <br /> Compound Sample SPK Level SPK Result Recovery Limits RPD <br /> cone g 96 <br /> For Water Matrix (ug/L) <br /> BD201 09 02 / - Laboratory Control Spikes <br /> 1, 1-Dichloroethene 40 38 95 61-145 <br /> Toluene 40 37 93 76-125 <br /> Trichloroethene 40 44 110 71-120 <br /> Benzene 40 39 98 76-127 <br /> Chlorobenzene 40 40 100 75-130 <br /> » Surrogate Recoveries ($) « <br /> Dibromofluoromethane 95 86-121 <br /> Toluene-d8 94 () . 12 <br /> Bromofluorobenzene 84 L 110 <br /> 0 For Water Mati ' (ug/L) <br /> BD201 09 04 / 05 - Sample Spiked 81274 - 01 <br /> 1, 1-Dichloroethene ND 40 43/41 108/103 61-145 5 <br /> Toluene ND 40 41/41 103/103 76-125 0 <br /> Trichloroethene ND 40 43/43 108/108 71-120 0 <br /> Benzene ND 40 42/42 105/105 76-127 0 <br /> Chlorobenzene ND 40 42/41 105/103 75-130 2 <br />>> Surrogate Recoveries (W) <c <br /> Dibromofluoromethane 98/98 86-121 <br /> Toluene-d8 96/99 90-112 <br /> Bromofluorobenzene 88/91 84-110 <br /> Definitions <br /> ND = Not Detected <br /> RL = Reporting Limit <br /> KA = Not Analysed <br /> RPD = Relative Percent Difference <br /> ag/L = parts per billion (ppb) <br /> nug/kg = Parts per billion (ppb) <br /> g/L = parts per million {ppm) <br /> mg/kg = parts per million (ppm) <br /> 0 Page 10 of 10 <br /> Certified laboratories <br /> 825 Arnold Dr Suite 114 1555 Burke St Unit 1 309 S Cloverdale St Suite B-24 <br /> Martinez California 94553 San Francisco California 94124 Seattle, Washington 98108 <br /> (5 10) 229-1512 / fax f5 10) 229-1526 (4 15) 647-2081 / fax (4 15) 821-7123 (206) 763-2992 / fax (206) 763-8429 <br />