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ATC Diesel Performance Proposal for Limited Phase II ESA May 25, 2017 Page 1 1.0 PROPERTY DESCRIPTION The site is located on the south side of Fremont Street and east of Filbert Street in Stockton, California and consists of five parcels, approximately 3.57 acres in size. The location consists of mixed-use residential properties, retail and commercial properties, and light industrial properties. The site is currently occupied by Diesel Performance, Inc., a diesel truck sales, service and repair business. 2.0 RECOGNIZED ENVIRONMENTAL CONDITIONS In April 2017, Advanced GeoEnvironmental, Inc. (AGE) performed a Phase I ESA for Diesel Performance, Inc., the current property owner. This Phase I ESA identified three recognized environmental conditions (RECs) as follows: Long-term use of the property as a diesel engine/tractor repair facility and an auto wrecking facility since at least the late 1940s, Oil staining within the machine shop, general service shop, machine shop, and the repair truck storage yard; and Presence of an oil/water separator. The conclusions of the Phase I ESA included a recommendation to collect soil and soil vapor samples to determine if long-term use of the property as a repair facility has impacted the subsurface. 3.0 PROPOSED PHASE II ESA SCOPE OF WORK The purpose of the Phase II ESA is to provide recent and independent data to determine whether contaminants may have been released from the oil/water separator and wash rack to the subsurface or if long-term oil staining has adversely impacted the subsurface at the property. To accomplish this goal, ATC proposes the following scope of work. 3.1. PRE-FIELD ACTIVITIES A site-specific Health & Safety Plan (HASP) and Job Safety Analysis (JSA) will be created for the proposed activities to establish the personal health and safety procedures of ATC employees performing work at this location. The HASP defines safety practices and procedures instituted in ATC work places, as applicable. The program meets, and often exceeds, the requirements promulgated by the Occupational Safety and Health Administration. ATC will contact Underground Service Alert (USA) North, 811, to locate public subsurface utilities in the vicinity of the proposed soil borings. Additionally, a private utility locator service will be asked to locate facility-specific utilities not covered by USA North 811. Each proposed soil boring location will be marked for the utility locators prior to drilling. ATC will also obtain required drilling permits for the subsurface investigation from the San Joaquin County Environmental Health Department (SJCEHD).