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k%1 KLEINFkI [JFK 5 PUSH PROBE ASSESSMENT 51 PERMITTING AND PREFIELD ACTIVITIES Kleinfelder submitted a workplan to PHS/EHD for additional soil and groundwater sampling using ' push probes north of the former UST (File number 20-4439-01 E01, dated April 25, 2000) The workplan was developed to assess the former UST contaminant plume in a northward direction Approved boring permits were obtained prior to initiating the field activities Underground ' Services Alert (USA) was contacted prior to field activities For a copy of the well/boring permits and PHS/EHD's approval,please refer to Appendix E ' 5.2 FIELD ACTIVITIES ' On June 1, 2000, Joe Zilles, Kleinfelder geologist, supervised a push probe assessment involving five borings GP-1 through GP-5 located in the vicinity of the former UST Four push probes (GP-1 through GP-4) were placed north and northwest of the former UST location in a rough ' semi-circle One push probe was also advanced south of the former UST at the request of Mr Mike Infurna, inspector for PHS/EHD This push probe was advanced south of the former UST and dust south of existing monitoring well MW-2 Please refer to Plate 1 for locations The fivePP ush robes were advanced to approximate total depths that ranged between 36 and 50 P P feet below ground surface (bgs) Groundwater was encountered between 28 and 31 feet bgs ' The push probe borings were pneumatically advanced using a 4 foot steel core barrel Soil samples were continuously collected by inserting a four foot acetate liner into the probe prior to ' each drive Soil samples obtained for potential chemical analyses were collected at desired intervals by removing the acetate liner and cutting out the desired 6-inch interval Samples submitted for analysis were collected in the estimated capillary fringe area at depths ranging from ' 28 to 32 feet bsg The soil samples were sealed with Teflon®film and plastic end caps No free groundwater was initially encountered during the collection of soil samples at depths ' ranging from 28 to 31 feet bgs Additionally groundwater was slow to equilibrate in the push probes until greater depths were probed (approximately 40 feet bsg or greater) or when coarser soils were encountered Groundwater, however, appeared to equilibrate at 28 to 31 feet bgs, although no water was encountered in push probe GP1 at a depth of 36 feet bgs During the advancement of the push probes, Kleinfelder collected soil samples for logging purposes, field screening and potential chemical analysis The soil samples collected were field screened using a photo-ionization detector as described in Appendix A, Section A-2 2 Photo- ionization detector (PID) readings were recorded on the boring logs and ranged from 2 parts per million by volume (ppmv) to 9 ppmv No discolored soils or unusual odors were noted in soil or water collected from the five push probe locations 20-4439-01 EOU2000R726 Page 8 of 17 ' Copynght 2000 Kleinfelder, Inc October 16,2000