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Carollo EngineersGRO November 21, 2006(Project No. 3045.036) 3.0 WELL SAMPLING The field personnel will bail water from each well until one of the three conditions is met: 10 well casing volumes of water have been removed from the monitoring wells; the discharge water becomes clear, and, the measurement of conductivity, pH, and temperature in the discharge water have stabilized. The field personnel will store all discharge water from the wells in 55-gallon drums. The water will either be disposed at the nearby wastewater treatment plant or it will be off-hauled to a permitted water recycling facility. After well development, field personnel will purge each well of an additional three well volumes before sampling. Well sampling may commence no sooner than 48 hours after the completion of well development. The field crew will use bailers or a peristaltic pump to purge the wells. If the recharge of the wells is very slow or takes several days for the water level to recover, then we will consider that well development is complete when water level recovers to within 80 percent of its initial drawdown. We present below the list of chemical tests on the groundwater samples, the EPA Analytical Methods, the units of the results, the reporting limits of the analyses, and the holding time for the samples. Monitoring EPA Analytical Reporting Holding Parameter Method Limits Preservation Container Time Alkalinity 310.1 5 mg/I unpreserved 500 ml poly 48 hours pH 9040/9045 pH number unpreserved 500 ml poly ASAP specific conductance 120.1/9050 5 umhos/cm unpreserved 500 ml poly 14 days total dissolved solids 160.1 5 mg/I unpreserved 500 ml poly 7 days hardness 200.7 5 mg/I unpreserved 250 ml poly 28 days Chloride 300 5 mg/I unpreserved 500 ml poly 14 days Carbonate 310 5 mg/I unpreserved 500 ml poly 14 days Bicarbonate 310 5 mg/I unpreserved 500 ml poly 14 days Nitrate-Nitrogen 300 5 mg/I unpreserved 500 ml poly 48 hours Sulfate 300 5 mg/I unpreserved 500 ml poly 14 days Sodium 6010 5 mg/I HNO3 250 ml poly 6 months Potassium 6010 5 mg/I HNO3 250 ml poly 6 months Calcium 6010 5 mg/I HNO3 250 ml poly 6 months Iron 6010 50 mg/1 HNO3 250 ml poly 6 months Barium 6010 10 mg/1 HNO3 250 ml poly 6 months Strontium 6010 0.1 mg/I HNO3 250 ml poly 6 months Aluminum 6010 50 mg/1 HNO3 250 ml poly 6 months Boron 6010 2 mg/I HNO3 250 ml poly 6 months Manganese 6010 5 mg/I HNO3 250 ml poly 6 months Copper 6010 5 mg/I HNO3 250 ml poly 6 months Zinc 6010 5 mg/I HNO3 250 ml poly 6 months Legend: ASAP-As soon as possible umhos/cm-micromhos per centimeter poly-polyvinyl plastic G VO9 QCS\304S 045 msTwAL DOCSwPT.rNDv ooc 4