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March 31, 2004 Lab ID STK431885 <br /> Ground Zero Analysis Customer 3-14996 <br /> Quality Control - Organic <br /> �Consfttuent Method Date/ID Type Units Cone QC Data DQO Note <br /> Trichloroethylene 5242 03/23/2004 A209 BS ug/L 1000 92 8% 84-131 <br /> BSD ug/L 1000 978% 84-131 <br /> BSRPD ug/L 52% s 15 9 <br /> 5242 03/23/2004 A 00-CCV ug/L 1000 906% 70-130 <br /> Trichlorofluoromethane 5242 031231200.1 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 134% 72-190 <br /> BSD ug/L 1000 119% 72-190 <br /> BSRPD ug/L 122% 521 3 <br /> 5242 03123!2004 A 00-CCV ug/L 1000 165%, 70-130 360 <br /> 12 3-Tnchloropropane 5242 03/23/2004 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 109% 86-151 <br /> BSD ug/L 1000 111% 86-151 <br /> BSRPD ug/L 17% 523I <br /> 5242 03;23!2004 A 00-CCV ug/L 1000 124% 70-I30 <br /> 1 1 2-Tnchlorotnfluoroethane 5242 03/23/2004 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 83 9% 70-185 <br /> . BSD ug/L 1000 814% 70-185 <br /> BSRPD ug/L 3 1% 516 2 <br /> 5242 03/23/2004 A 00-CCV ug/L 1000 830% 70-130 <br /> 1 2 4-Tnmethylbenzene 5242 03/23/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 117% 90-161 <br /> BSD ug/L 1000 116% 90-161 <br /> BSRPD ug/L 16% 530 0 <br /> 5242 03123/2004 A 00-CCV ug/L 1000 118% 70-130 <br /> 1,3 5-Tnmethylhenzene 5242 03123/200.4 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 128% 89-157 <br /> BSD ug/L 1000 122% 89-157 <br /> BSRPD ug/L 49% :916 2 <br /> 5242 03/23/2004 A 00-CCV ug/L 1000 119% 70-130 <br /> Vinyl Chionde 5242 03/23/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 122% 77-171 <br /> BSD ug/L 1000 100% 77-171 <br /> BSRPD ug/L 199% 513 6 410 <br /> 5242 03/23/2004 A 00-CCV ug/L 1000 146% 70-130 360 <br /> Xylenes m p 5242 03/23/2004 A209 Blank ug/L ND <05 <br /> BS ug/L 2000 117% 82-145 <br /> BSD ug/L 2000 106% 82-145 <br /> BSRPD ug/L 93% 518 0 <br /> 524 2 03/23 00/300}A CCV ug/L 20 00 104% 70-130 <br /> • Explanations and definitions are conunued on next p to <br /> STK431885 Quality Control Page 8 <br />