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CvvATC, • A S 5 0 C I A t E S I N C On July 23, 1997, an ATC geologist supervised the advancement of five soil borings ranging in depth from 6 to 46 feet bgs The soil borings were advanced using a truck mounted Geoprobe® narrow diameter rig employing direct push technology Soil samples were submitted for analysis and contained detectable concentrations of petroleum hydrocarbons Site activities were summarized in ATC's Summary Report for Subsurface Investigation, dated October 20, 1997 On September 25, 1998, ATC personnel supervised the advancement of soil boring MWl at the site to a depth of approximately 65 feet bgs to evaluate groundwater for the presence of petroleum hydrocarbons The soil boring was completed as a groundwater monitoring well and on September 28, 1998 the well was developed and sampled Analytical data indicated that soil and groundwater samples contained detectable concentrations of petroleum hydrocarbons Field activities and analytical results were detailed in ATC's Summary Report of Additional Subsurface Investigation, dated January 8, 1999 SCOPE OF WORK Planning and Permits ATC has completed the well installation permit application for the proposed subsurface investigation The permit application and associated fees (check no 274) are attached to this • workplan ATC will also schedule field personnel and equipment, notify Underground Services Alert to locate underground utilities as required, and perform any other necessary field preparation and job start-up activities Installation of Soil Borings and Monitoring Wells Three soil borings will be advanced using a hollow stem auger equipped drill rig to depths of approximately 65 feet bgs Soil samples will be collected at five-foot intervals or significant changes in lithology Drilling will be conducted by a State licensed (C57) drilling company A field geologist will be present to log all drill cuttings and soil samples Each soil sample will be field screened with a Photoionization Detection (PID) meter or similar instrument and at least two samples from each of the three borings, based on field observations (i e odor, discoloration, PID readings), will be placed in a cooler with ice and submitted for laboratory analysis Placement of Borings and Wells To evaluate the lateral extent of impacted groundwater, one boring will be located approximately 15 feet south-southwest of well MW1, one boring will be located approximately 30 feet southeast of well MW1, and one boring will be located approximately 35 feet northeast of well MW 1 The expected groundwater flow direction is to the northeast Proposed boring locations are shown on Figure 2 w 1625771reportslwkpwe1s doc 2