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April 14, 2004 Lab ID : STK431922 <br /> Valley Industries <br /> Customer : 3011146 <br /> Quality Control: <br /> Inorganic - Metals QC <br /> 245.1 03/29/2004:B - HG202 All analysis quality controls are within established criteria. <br /> 3010A 04/02/2004:A207 All preparation quality controls are within established criteria. <br /> 3050B 03/24/2004:A209 All preparation quality controls are within established criteria, except: <br /> The following note applies to Silver, Arsenic, Barium, Beryllium, Cadmium, Cobalt, <br /> Chromium, Copper, Molybdenum, Lead, Antimony, Selenium, Thallium, Vanadium, <br /> Zinc: <br /> 435 Sample matrix may be affecting this analyte. Data was accepted based on the <br /> LCS or CCV recovery. <br /> 6010B 03/24/2004:A - IT202 All analysis quality controls are within established criteria. <br /> 03/26/2004:A - IT202 All analysis quality controls are within established criteria. <br /> 03/31/2004:A - IT202 All analysis quality controls are within established criteria. <br /> 04/06/2004:A - I7'202 All analysis quality controls are within established criteria. <br /> 04/07/2004:A - IT202 All analysis quality controls are within established criteria. <br /> 04/13/2004:A - IT202 All analysis quality controls are within established criteria. <br /> 7470A 03/25/2004:C212 All preparation quality controls are within established criteria. <br /> 7471A 03/24/2004:A212 All preparation quality controls are within established criteria. <br /> 03/24/2004:A - HG201 All analysis quality controls are within established criteria. <br /> STLC 04/08/2004:A217 All preparation quality controls are within established criteria. <br /> Certi£cation: I certify that this data package is in compliance with NELAC Standards, both <br /> technically and for completeness, except for any conditions listed above. Release of the data <br /> contained in this data package is authorized by the Laboratory Director or his designee, as <br /> verified by the following signature. <br /> FGL ENY-IRONMENTAL <br /> KAD:cea Kel Dunnahoo, B.S. <br /> boratory Director <br /> STK431922: Case Narrative Page 2 <br />