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geotechnical laboratory for analysis for permeability, porosity, bulk density, moisture content and organic carbon content 8) Drill borings east and west of the line of recovery wells on the northern portion of the property using a Geoprobe to define the extent of contamination west of RW-1 and east of RW-5 9) One soil and one groundwater sample collected from each boring was analyzed for TPH-G, BTEX, seven oxygenates (including ethanol and methanol) and the lead scavengers 1,2-DCA and 1,2-EDB by EPA Method 8260, and TPH-D by modified EPA Method 8015 10) Prepare a report presenting the results of this assessment 4 . 0 CPT DRILLING AND WATER SAMPLE COLLECTION 4- 1 -Permit ASE obtained drilling permits from the San Joaquin County PHS-EHD ASE also obtained an encroachment permit from the City of Manteca to allow for drilling in the city right of way, and access agreements with the • individual property owners where CPT borings were to be located Copies of these encroachment permits and access agreements are located i n Appendix B Copies of the drilling permits are on file at the San Joaquin County PHS-EHD Underground Service Alert (USA) was notified to have underground public utilities marked in the site vicinity 4 -2 CPT Drilling Between January 22 and 31, 2001, Gregg In-Situ of Martinez, California drilled soil borings CPT-17 through CPT-26 north of the site using a CPT direct push drill rig (Figure 4) The purpose of these borings was to determine the lithology at each location This information was then used to determine the locations of zones of high permeability where groundwater samples were to be collected Groundwater samples were then collected from each of these high permeability zones The drilling was directed by ASE senior geologist Robert E Kitay, RG and/or associate geologist Erik Paddleford Boring CPT-17 was located near the domestic well for the house located on the back (west) portion of the 17933 Airport Way property Boring CPT-18 was located on the east shoulder of Airport Way in front of 17926 • Airport Way Boring CPT-19 was located on the northern portion of the Franks One Stop Report -- March 2001 -10-