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21 July 2015 <br /> AGE Project No. 14-3154 <br /> Page 8 of 15 <br /> • Soil borings will be advanced at the locations of borings AB18 and AB19 for <br /> collection of soil and groundwater samples and six additional soil borings will be <br /> advanced in the locations within the historical surface water ponds for collection <br /> of soil samples. <br /> • Soil borings will be advanced north of the on-site warehouse near wells W-3, W-4 <br /> and W-6 to collect soil samples for background concentrations. If previous soil <br /> borings were advanced in the area and appropriately analyzed, the analytical <br /> data will be provided in the subsequent report of findings. An alternative location <br /> for soil borings which represent background would be the parking lot area, <br /> located on the northern boundary of the property. <br /> • Soil borings (three) will be advanced in the area of the waste water treatment oil- <br /> water separator control secondary containment pad, directly south, north and <br /> west of the adjacent area to evaluate groundwater for production waste oil. <br /> Proposed soil boring locations are depicted in Figures 2 and 3. <br /> GROUNDWATER MONITORING WELL SAMPLING <br /> The groundwater monitoring network consists of three shallow screened wells <br /> ( W-1 through M -3) for a diesel spill near the south side of the furnace building and <br /> several shallow screened wells (W-0 through W-8) for a waste discharge permit <br /> monitoring program. Groundwater monitoring will be conducted on a wells located near <br /> the former waste handling area (W-0, W-1 R and W-2). Only on monitoring event is <br /> proposed. <br /> STATIC WATER LEVEL MEASUREMENTS <br /> Before sampling and during groundwater monitoring, static water levels are measured <br /> using an electric water level indicator. Water level data is recorded to the nearest 0.01- <br /> foot from a reference point marked on the top of the PVC well casing. <br /> WELL EVACUATION <br /> Subsequent to measurement of depth to water and prior to sampling, each well is <br /> purged to ensure samples are representative of the formation, rather than standing <br /> water in the well casing. Wells are purged using a disposable polyethylene bailer. <br /> Wells are purged until a minimum of three casing-water volumes are removed from the <br /> well and/or the field-measured groundwater parameters (pH, temperature, and <br /> conductivity) are stabilized. However, if a well is purged dry prior to evacuating three <br /> Advanced GeoEnvironmental,Inc. <br />