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• DIRECT PUSH BORING INVESTIGATION 1.0 INTRODUCTION Condor Earth Technologies, Inc (Condor) performed a Phase II Environmental Site Assessment at the request of the City of Stockton, Department of Housing and Redevelopment (DHR) for the properties (site) comprising the six-block area bounded by E Miner Avenue to the north, N Stanislaus Street to the west, E Weber Avenue to the south, and the Southern Pacific Railroad tracks to the east in the city of Stockton, California The Geoprobe investigation was designed to help delineate the possible locations and extent of soil and groundwater contamination The Phase II ESA fieldwork was performed between May 13 and September 16,2002 Figures referenced in this section are located in Appendix A of Condor's Phase II Environmental Site Assessment Report, Multi-Modal Station "Six-Block Project" Stockton, Sart Joaquin County, California dated January 6, 2003 2.0 SITE PREPARATION On April 17, 2002, Condor submitted an application for encroachment on public right-of-way to the City of Stockton Public Works Department for the borings to be advanced within the roadway of the site On April 18, 2002, Condor submitted eight well permit application forms to the San Joaquin County Environmental Health Division (EHD) One well permit application form was submitted for each of the six blocks and two well permit application forms were submitted for the borings to be advanced within the roadways — one for CPT drilling and the other for Geoprobe drilling On May 10, 2002, Condor mailed letters to the owners of the properties located within the six-block area notifying them of the upcoming work intended to be conducted at the site All CPT and direct push boring location areas were marked with white paint, and Underground Services Alert (USA) was notified at least 72 hours in advance of the drilling fieldwork to locate and identify underground utilities in the vicinity of the work area However, because many of the proposed boring locations were on private property, some utilities contacted by USA did not mark the locations of their utilities past property boundaries and onto private properties E14D and the City of Stockton were notified of the fieldwork schedule at least 48 hours in advance Prior to commencement of fieldwork each day, a tailgate safety meeting was conducted and a site-specific Health and Safety Plan was discussed with, and presented to, all field personnel for their signatures 3.0 DIRECT PUSH BORING PROCEDURES Vironex Environmental Field Services (Vironex) of San Leandro, California, advanced the direct push borings using a Geoprobe 6600 drilling rig, unless otherwise noted The general boring scheme included the advancement of Geoprobe borings to a depth of 15 feet bgs and detection and "perimeter" detection borings to a depth of 45 feet bgs The Geoprobe borings were advanced to evaluate the potential presence of near-surface soil contamination between 0 feet and 15 feet bgs, and were typically advanced on private properties The detection borings were installed to investigate the potential for shallow soil contamination between 0 feet and 15 feet bgs, and soil and groundwater contamination between 35 feet and 45 feet bgs