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• A. PLACEMENT OF MONITORING WELLS At this time, there will be no placement of monitoring wells. The objective of the workplan is to determine if any significant contamination has resulted from the Shinko operations. B. DRILLING METHOD FOR MONITORING WELLS Because monitoring wells are not part of this preliminary investigation, no description of drilling methods for wells is needed for this workplan. C. GROUNDWATER SAMPLING PLAN The groundwater sampling plan includes sampling of the first encountered water during soil boring. There will be six groundwater samples taken (Map 5), one sample from each bore hole. The absence of established domestic or monitoring wells on the property eliminates the potential for any well sampling. There will be no well purging or well purge water characterization. 1. WATER LEVEL MEASUREMENT, GROUNDWATER ELEVATION, GRADIENT & FLOW DIRECTION a. WATER LEVEL MEASUREMENT METHOD • Absence of wells precludes the need for well water level measurements. b. GROUNDWATER ELEVATION, GRADIENT&FLOW DIRECTION After bore holes have been drilled and groundwater reached, a piece of slotted PVC pipe will be installed in each bore hole. After placement of the pipe and groundwater sampling, the groundwater will be allowed to equilibrate overnight. In relation to an arbitrarily established datum, a survey will be conducted to measure the groundwater elevation in the holes. The groundwater elevation information will be used to calculate the on-site groundwater gradient and flow direction. Direction of local flow will determine actual locations of groundwater samples versus proposed locations shown on Map 5. 2. DISPOSAL OF EXCESS GROUNDWATER Excess groundwater retrieved during sampling will be contained in closed-top, labelled 55-gallon drums. After analysis has been completed, the groundwater will be disposed of according to applicable federal, state, and local regulations. • 7 ERICKSON, Inc. Specialized Service to Industry Since 1942