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Phase I Environmental Site Assessment Neighborhoods D,K,L,and Town Center,Mountain House,California Page 20 ` assessment are presented in Chevron Pipeline Easement Environmental Assessment Repo , dated November 26,2001 (Condor project No. 2496JI). There is an abandoned Shell Oil petroleum product pipeline alignment within Neighborhood D. An abandoned and partially removed petroleum products pipeline alignment transects the northwestern through to the southeastern portions of Neighborhood D and is roughly parallel to and approximately 4,000 feet to the northeast of the two active PG&E natural gas pipelines and the southern Chevron/Texaco pipeline in Neighborhood C. Condor conducted an environmental assessment in 2003 for a portion of the Shell Oil petroleum pipeline. The results of this assessment are presented in the Former Shell Pipeline .Investigation Report dated January S, 2004(Condor project No. 2496T5). 7.1.1 Active Pipelines There are two active petroleum product pipelines within 500 feet of Neighborhood L and Town Center and one active natural gas pipeline on Town Center properties. During the course of Condor's Chevron pipeline easement investigation along Byron Road, two additional petroleum pipelines were identified in the area: a six-inch diameter Chevron/Texaco petroleum pipeline along on the north side of Byron Road and a 12-inch diameter. Kinder Morgan petroleum pipeline also along on the north side of Byron Road. The Kinder Morgan petroleum product pipeline was previously owned by Santa Fe Pacific Petroleum and is approximately 30 feet southwest of, and parallel to,the railroad located north of Byron Road. The one active natural gas pipeline is a six- and eight-inch diameter distribution line, which runs north along Mountain House Parkway (formerly Patterson Pass Road), west along Amaudo Boulevard, north along Dc Anza Boulevard (through Town Center), and northwest across the easternmost portion of Neighborhood H, the southernmost portion of Neighborhood J, and the southern half of Neighborhood I (Figure 5,Appendix A). A gas pipeline warning sign is posted on the west side of Kelso Road and on the south side of Byron Road. This PG&E pipeline is located within the historic pipeline easement that was formerly owned by Standard Oil Company. 7.1.2 Abandoned Chevron Pipeline:Byron Road The abandoned Chevron crude oil pipeline, also known as the Old Valley Pipeline (OVP), is located along the south side of Byron Road in the vicinity of Neighborhood L and Town Center. Condor conducted a limited soil and bnoundwaterinvestigation adjacent to Byron Road to investigate gate the possible presence of petroleum hydrocarbons in soil related to the OVP. Soil and groundwater investigation activities were conducted at the Site between June 6 and 28, and on July 24 and 25, 2001. Subsequent sampling was conducted to evaluate the impact of detected petroleum hydrocarbons on construction. In summary, contaminated soil [petroleum hydrocarbons. and polynuclear aromatics (PNAs)] was observed and detected in soil borings at depths ranging from four to 46 feet b s. Groundwater sampling g from the soil borings with visible contamination indicated contamination by petroleum hydrocarbons and Y PNAs. However, soil and groundwater contamination by petroleum hydrocarbons in the vicinity of the OVP in the areas investigated by Condor between the Alameda County line and Wicklund Road is intermittent along the alignment (See Figure 5, Appendix A) and is up-gradient of Neighborhood L. Ongoing investigation and remediation efforts associated with the OVP contamination are being conducted by Chevron Environmental.Management Company. 7.1.3 Abandoned Shell Pipeline Alignment A petroleum products pipeline alignment formerly owned by Shell transects Sections 8 and 16, Township 2 South, and Range 4 East from northwest to southeast. According to past inquiries, the pipeline was removed in the northern half of Section 16 and abandoned in place in the southern half of that section (Neighborhood yrs -- �"a CONDOR