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r , <br /> CASE NARRATIVE <br /> CLIENT: URS <br /> PROJECT: WORLD ENTERPRISES <br /> SDG: 061-204 <br /> METHOD 7470A <br /> DISSOLVED MERCURY BY COLD VAPOR <br /> Three (3) water samples were received on 12/16/06 for Dissolved Mercury <br /> analysis by Method 7470A in accordance with USEPA SW846,3`d ed.. <br /> 1. Holding Time <br /> Analysis met holding time criteria. <br /> 2. Method Blank <br /> Method blank was free of contamination at the reporting limit. <br /> 3. Lab Control Sample/Lab Control Sample Duplicate <br /> Lab control results were within QC limit. <br /> 4. Serial Dilution/Post-Analytical Spike <br /> Sample L217-01 from another SDG was analyzed for serial dilution and <br /> post-analytical spike. All QC requirements were met. <br /> 5. Matrix Spike/Matrix Spike Duplicate <br /> MS/MSD sample was not designated in this SDG. <br /> 6. Sample Analysis <br /> Samples were analyzed according to the prescribed QC procedures. All <br /> criteria were meta <br /> 7022 <br />