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R NEIGHBORHOODS C AND D 2007 Remedial Action: According to the March 2007 Remedial Action Report, Mountain House Neighborhood C and D, Parcels 209-450-02, 04, -11, -12, and -13 prepared by SAIC, "an approximately 5,200-foot lineal section of the pipeline route crossed the northeastern comer of Parcel 209450-02, the northeastern portion of Parcel 209-450-04, the north and central portions of Parcel 209450-11, the central portion of Parcel 209-450- 12, and the southwestern portion of Parcel 209-450-13 (the site), which are located north of Grant Line Road and west of Mountain House Parkway, northwest of Tracy, California." Parcels 209-450-02, 209-450-04 and 209-450-11 are currently owned by Shea Homes (Shea) and are planned for residential use in the development known as Mountain House. Parcel 209-45-12 was owned by Ms. Isabel Oliveira. Parcel 209-45-13 was owned by Ms. Mary Maria Rocha also as farmland. These properties are within the proposed Mountain House development, and current ownership and development plans are uncertain. According to SAIC, "Parcels 209-450-02 and Parcel 209-45-04 will be developed into Neighborhood C, which will be bordered by Great Valley Parkway on the west, Mascot Boulevard to the north, Central Parkway to the east, and Grant Line Road to the south. Parcels 209-450-11, 209-450-12, 209-450-13, and 209-450-14 will be included in Neighborhood D, bounded by Central Parkway to the west, Mascot Boulevard to the north,Mountain House Parkway to the east, and Grant Line Road to the south." In October of 2004, Clayton performed a series of activities to investigate the soil conditions along the alignment of the former pipelines in Neighborhoods C and D. The SAIC report states that "these activities included digging several test pits to verify the location of the former pipeline." Former pipeline evidence included chips of the pipelines' coating and soil variations in the fill used in the former pipeline trench when the pipelines were extracted. The SAIC report also states that "Clayton further investigated the soil conditions along the alignment of the former pipeline by advancing soil borings, generally 8 feet beluv; ground surface (fbg), every 25 feet along the alignment." Where hydrocarbon-impacted soil was observed in these borings, additional borings were advanced to depths of up to 28 fbg to further characterize the extent of the impact. According to SAIC, in 2004, "Clayton issued a report summarizing the field investigation of Neighborhoods C and D to that point. This report identified 13 areas 060222(11) B-2 CONESTOGA-ROVERS&ASSOCIATES