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i . The only compound detected in groundwater samples collected from boring CPT-19 was 22 ppb TBA in the sample collected from 15-feet bgs ENo compounds were detected in the groundwater samples collected from 41-feet bgs No deeper zones of high permeability were found in this boring The only compounds detected in groundwater samples collected from boring CPT-22 were 051 ppb 1,2-DCA and 097 ppb 1,2-DCP in the sample collected from 158-feet bgs No compounds were detected in groundwater samples collected from 15-feet bgs, 40-feet bgs, 51-feet bgs, iand 98-feet bgs in this boring In addition, no compounds were detected in any of the groundwater samples collected from boring CPT-25, also drilled on the 17793 Airport Way property The only compound detected in groundwater samples collected from I boring CPT-23 was 1 2 ppb 1,2-DCA in the groundwater sample collected from a depth of 83-feet bgs No compounds were detected in groundwater samples collected from 15-feet bgs, 28-feet bgs, 43-feet bgs, ' and 73-feet bgs in this boring In addition, no compounds were detected in groundwater samples collected from any depth sampled in boring CPT-24, also located on the 17717 Airport Way property, or in boring CPT-20, northeast of the 17717 Airport Way property 2-21 January 2001 On-Site Geonrebe Drilling In January 2001, ASE drilled soil borings BH-A through BH-C at the site using a Geoprobe hydraulic sampling rig (Figure 6) These borings were drilled east and west of the line of recovery wells on the northern portion of the site to define the extent of contamination west of RW-1 and east of ' RW-5 Groundwater samples collected from boring BH-A contained 9, 100 ppb TPH-G, 4,400 ppb TPH-D, 10 ppb ethyl benzene, and 27 ppb total ' xylenes The groundwater sample collected from boring BH-B contained 150,000 ppb TPH-G, 36,000 ppb TPH-D, 420 ppb benzene, 5,900 ppb toluene, 4,700 ppb ethyl benzene, 25,000 ppb total xylenes and 120 ppb MTBE The groundwater sample collected from boring BH-C contained 0 57 ethyl benzene, 3 1 ppb total xylenes and 0 55 ppb MTBE These results indicate that there is significant contamination beyond the ' calculated capture zone west of the recovery wells 2.22 February 2001 Groundwater Sampling In February 2001, ASE collected groundwater samples from the monitoring wells on the north shoulder of West Yosemite Avenue Frank's One Stop Workplan — September 2003 1 -10- 1