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rerraccn <br /> LIMITED SITE INVESTIGATION <br /> VACANT PROPERTY <br /> 23577 SOUTH MOUNTAIN HOUSE PARKWAY <br /> TRACY, SAN JOAQUIN COUNTY, CALIFORNIA <br /> Terracon Project No. NA197074B <br /> May 26, 2023 <br /> 1.0 Introduction <br /> 1.1 Site Description <br /> The site is an approximately 135-acre tract of land located at 23577 South Mountain <br /> House Parkway, Tracy, San Joaquin County, California (assessor's parcel number [APN] <br /> 209-080-26). The site currently consists of vacant land (see Exhibit 1 — Topographic <br /> Map in Appendix A). A former Chevron pipeline (currently owned by Crimson California <br /> Pipeline) and two PG&E natural gas pipelines run through the southwestern corner of the <br /> property within a 50-foot-wide easement from northwest to southeast. The Crimson <br /> pipeline has operated since 1952 and transports crude oil from Kern County to refineries <br /> in the San Francisco Bay Area. <br /> 1.2 Site Background and Scope of Work <br /> In the southwest corner of the parcel, on December 4, 2003, a farmer ruptured the <br /> Chevron crude-oil pipeline with farming equipment, which resulted in an oil spill at the <br /> property estimated by Chevron to be 31,500 gallons. An estimated 16,800 gallons of oil <br /> was cleaned up by the excavation of the impacted soil and vacuuming of free-product. <br /> Approximately 14,700 gallons of oil was estimated to remain in the subsurface soil. <br /> Chevron's consultant Cambria, documented emergency response and oil-impacted soil <br /> removal activities in a report titled 'Emergency Response Environmental Report, County <br /> Flags Release, Spatafore Property, 23577 Mountain House Parkway (Cambria Project <br /> #483-1858), dated March 11, 2004. Oil impacted soil was reported at depths ranging <br /> from 5 to 9 feet bgs, and the apparent lateral extent of oil impacted soil was estimated <br /> to be a maximum dimension of approximately 380 by 380 feet. <br /> Kleinfelder prepared a Work Plan dated March 22, 2004 for a limited soil and <br /> groundwater assessment in the vicinity of the ruptured former Chevron pipeline. <br /> In May 2004 Kleinfelder performed the limited soil and groundwater assessment. A <br /> summary of Kleinfelder's findings are summaries below: <br /> Responsive ■ Resourceful ■ Reliable 1 <br />