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January 21, 2005 Lab ID STK438872 <br /> Ground Zero Analysis Customer 3-14996 <br /> Quality Control - Organic <br /> IConstituent Method DatellD Type Units Cone QC Data DQO Note <br /> Trichloroethylene 5242 12/30/2004 A209 BS ug/L 1000 117% 70-119 <br /> BSD ug/L 1000 128% 70-119 435 <br /> BSRPD ug/L 9 3% 515 4 <br /> 524 2 12/30/2004 A 00-CCV ug/L 1000 120% 70-130 <br /> I Trichlorofluoromethane 524 2 12/30/2004 A209 Blank ug/L ND <05 <br /> BS ug/L 10 00 74 1% 39-189 <br /> BSD ug/L 10 00 764% 39-189 <br /> BSRPD ug/L 3 0% X20 5 <br /> I5242 12/30/2004 A 00-CCV ug/L 1000 101% 70-130 <br /> 1,2 3-Trtchloropropane 5242 12/30/2004 A209 Blank ug/L ND <0 5 <br /> I BS ug/L 1000 63 1% 48-179 <br /> BSD ug/L 1000 764% 48-179 <br /> BSRPD ug/L 19 1% 522 3 <br />' <br /> 5242 12/30/2004 A 00-CCV ug/L 10 00 75 3% 70-130 <br /> 1 1 2-Tnchlor0trifluoroethane 5242 12/30/2004 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 630% 32-169 <br /> BSD ug/L 1000 73 2% 32-169 <br /> BSRPD ug/L 150% 520 4 <br /> 524 2 12/30/2004 A 00-CCV ug/L 1000 708% 70-130 <br /> 1 2 4-TnmethyIbenzene 5242 12/30/2004 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 90 8% 70-130 <br /> BSD ug/L 1000 107% 70-130 <br /> BSRPD ug/L 15 9% 520 7 <br />' 524 2 12/30/2004 A 00-CCV ug/L 1000 114% 70-130 <br /> 1 3 5-Trtmethylbenzene 524 2 12/30/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 99 8% 67-134 <br />' BSD ug/L 1000 108% 67-134 <br /> BSRPD ug/L 8 1% 521 7 <br /> 5242 12/30/2004 A 00-CCV ug/L 1000 124% 70-130 <br />' Vinyl Chloride 5242 12/30/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 10 00 799% 47-169 <br /> BSD ug/L 1000 73 8% 47-169 <br /> BSRPD ug/L 79% 5 27 5 <br />' 5242 12/30/2004 A 00 CCV ug/L 1000 126% 70-130 <br /> Xylenes m p 5242 12/30/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 2000 136% 61-134 435 <br /> BSD ug/L 2000 146% 61-134 435 <br /> BSRPDug/L 7 1% 5 19 5 <br /> 524 2 12/30/2004 A 00-CCV ug/L 2000 160% 70-130 360 —11 <br /> E,Lplanations and definitions are continued on next page <br /> STK438872 Quality Control Page 8 <br />