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c A v\7:2R�V(: A S S O C I A T E S I N C supervised the advancement of a boring for groundwater monitoring well MW-4R to replace the abandoned groundwater monitoring well MW-4 Analytical results of the soil samples collected from the boring for monitoring well MW-4R indicated that petroleum hydrocarbons were detected only in the sample collected from 6 5 feet bgs Petroleum hydrocarbon constituents have not been detected in groundwater samples collected from monitoring well MW-4R In January and February 1996, SECOR advanced ten soil borings at the site Soil samples and grab groundwater samples were collected from the borings Only one soil sample contained detectable concentrations of petroleum hydrocarbons at low levels Groundwater samples collected from borings SB2 and SB26 contained elevated concentrations of petroleum hydrocarbons and trace amounts of free product SCOPE OF WORK P_Lanlning and P_exm ATC has completed the PHS/EHD soil boring permit application for the proposed subsurface investigation The permit application and associated fees (check no 142) 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 Advancement of Soil-Burin= In an attempt to identify the source of impacted groundwater and define the extent of impacted groundwater at the site, up to ten soil borings will be advanced to approximately 15 feet bgs The first four soil borings will be advanced in the area of SECOR borings SB2 and SB26 Based on field observations, up to six additional soil borings will be advanced at locations determined by ATC and PHS/EHD in the field The anticipated groundwater flow direction is northeast The proposed first four boring locations are shown on Figure 2 The borings will be advanced using truck mounted GeoprobeO narrow diameter, direct push technology Drilling will be conducted by a State-licensed (C57) drilling company A field geologist will be present to log all soil samples Descriptions of soil types encountered and sample collection intervals will be recorded on boring logs Soil samples will be collected at five foot intervals or estimated changes in lithology, field screened with a PID, and an estimated two soil samples from each of the borings will be submitted for laboratory analysis Soil sample selection will be based on PID measurements and field observations (i a odor and soil discoloration) One groundwater sample will be collected from each boring at the depth groundwater is first encountered, anticipated to be approximately 7 feet bgs A Geoprobe0 Screen Point 15 w 1625141reportslwkp doc 3