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• Installation of two monitoring wells (MW-5 to 90 feet and MW-6 to 89 feet) by <br /> BSK in December 1993. <br /> • Excavation of approximately 330 cubic yards of petroleum-impacted soil from <br /> the former UST pit and vicinity by IT in May 1995. A vapor observation point <br /> ' was constructed at the base of the excavation The excavation was subsequently <br /> backfilled with clean imported fill material and capped. <br /> ' • Quarterly groundwater monitoring of MW-4 since October 1992 <br /> • Quarterly groundwater monitoring of MW-4, MW-5, and MW-6 since December <br /> ' 1993. <br /> ' 1.3 Scope of Work <br /> The scope of work included the drilling and sampling of two soil borings in the vicinity of <br /> the former UST excavation (Figure 2). Sample analyses included chemical, bloassessment <br /> ' and geotechnical testing. The purpose of the work was to assess current site conditions and <br /> provide a framework for recommending further action. <br /> 2.0 Project Actinide <br /> r2.1 Permitting <br /> A permit for drilling the soil borings was obtained from the County prior to initiating drilling <br /> activities (Appendix A). The drilling, sampling and grouting activities were observed by the <br /> County registered environmental health specialist (RENS) <br /> 2.2 Field Activltles <br /> The project activities performed included: <br /> • Mobilization <br /> ' Soil Boring and Sampling <br /> • Sample Analyses <br /> • Disposal Activities <br /> ' Demobilization. <br /> 2.2.1 Mobilization <br /> Prior to intrusive work, Underground Services Alert (USA) was notified to identify known <br /> utilities. Subdynamic Locating Services performed a geophysical line location survey in order <br /> to identify unmarked utilities. <br /> MZ111-2D-95/VDBF/95-OW7 2 <br />