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1 <br /> ' 2 0 SCOPE OF WORK <br /> The objectives of the project were to further define the impact to groundwater below the water table, <br /> and to establish a groundwater monitoring capability downgradient of the plume of impacted <br /> groundwater To achieve these objectives, cone penetration test(CPT) borings were advanced for <br /> discrete groundwater sampling at six on-site locations, a two-well monitoring well cluster was <br /> installed downgradient of the existing monitoring well network, and quarterly groundwater <br /> monitoring, sampling and analysis continued <br /> ' 21 Planning and Permitting <br /> Prior to initiating fieldwork, a site-specific health and safety plan addendum was prepared according <br /> to 29 CFR 1910 120 The health and safety plan included safety procedures for work to be <br /> performed, chemical hazard information, site safety officers, and a medical emergency location <br /> For the proposed work, drilling permits were obtained from PHSIEHD Since all of the drilling was <br /> ' on-site, neither encroachment permits nor private property access agreements were required <br /> At least two working days prior to field activities, Ramage Environmental notified PHSIEHD so that <br /> inspections could be scheduled Underground Service Alert was also notified so that members <br /> could mark any underground utilities <br /> 22 Cone Penetration Testing <br /> ' Between February 21 and March 5, 2002, Gregg In-Situ, Inc (Gregg), a state of California licensed <br /> drilling contractor (C-57#656407) drilled six on-site CPT borings, to further determine the soil <br /> stratigraphy, and to evaluate the vertical and lateral extent of impacted groundwater beneath the <br /> groundwater table One CPT boring (CPT-1 B) was located at CPT-1 and advanced to a total depth <br /> of approximately 155 feet to identify and discretely sample any groundwater-bearing intervals below <br /> r125 feet The five other CPT borings (CPT-2, 3, 4, 5, and 6) were located approximately 120 feet <br /> east, 30 feet south, 240 feet west, 220 feet northwest, and 150 feet north of the former UST (Figure <br /> 2) The five other CPT borings were extended to depths ranging from approximately 153 to 160 <br /> feet bgs The CPT logs are included in Appendix B <br /> 7 <br />