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Phase 1 Environmental Site Assessment Neighborhoods D,K,L,and Town Center,Mountain House,California Page 7 provided by the irrigation district with underground irrigation piping located in the southern and northern portions of Neighborhood D..A small farm complex that included several outbuildings for chickens and horses, an old barn, a house, a domestic well, a truck trailer, a large storage box,.and a propane tank is located along the southern boundary (Grant Line Road) of APN 209-450-12. A rural home, a domestic well, a propane tank, truck trailers, and large storage box are located along the southern portion/boundary (Grant Line Road) of APN 209-450-13. Overhead electrical transmission lines (Figure 5, Appendix A) and an associated tower are located in the southeastern coiner of the Neighborhood. A bermed area with piles of soil, concrete debris, and asphalt debris and with a possible small stormwater/irrigation retention basin with drainage to the east is located in the northeastern corner of Neighborhood D.The drainage area and the eastern portion of the basin retention berm appears to contain imported riprap previously identified as"greenstone,"not asbestos-containing serpentine. The site reconnaissance revealed that the majority of Neighborhood K is used as agricultural land. Irrigation ditches and piping were noted throughout the neighborhood. Most of the eastern portion appeared to be former agricultural lands currently being used to facilitate construction and development of the town of Mountain House and Mountain House Creek. Water (riparian rights) to the agricultural 4 fields is provided by irrigation pumps and ditches. Observed on property were: a water pump with k associated shed, irrigation piping, an electrical transformer on a utility pole, and stand pipes; a second water pump with piping; and monitoring wells. Overhead electrical wires on utility poles were observed r" crossing the southeastern portion of Neighborhood K. Site reconnaissance revealed that a narrow strip of the western portion of Neighborhood L appeared to be former agricultural lands currently being used to facilitate construction.and development of the town of Mountain House and Mountain House Creek. A long bermed area along the eastern side of Mountain House Creek was being seeded during the site reconnaissance. Stacks of PVC piping were noted in the area. The eastern portion of Neighborhood L is used as agricultural land (area for application of treated wastewater). Irrigation ditches and piping were noted throughout the neighborhood. An irrigation pond, pump, catwalk, and associated metal piping and .valves were observed in the northwestern portion of Neighborhood L, south of the levee road that parallels Old River. The southeastern portion of Neighborhood L has two reservoirs (known as Reservoirs lA and IB) belonging to the Mountain House Community Services District: an access road encircles the perimeter of the reservoirs. APN 209-040-09 (along the southern boundary of Neighborhood L) appears to be fallow agricultural land. A small old garage and a large pole barn with bales of hay and construction piping stored around it are located in the southwestern corner (APN 209-030-04) of Neighborhood L. Signage for buried underground water I� pressure lines (along the southern boundary of Neighborhood L) and petroleum pipelines (along the southern side of the railroad tracks, Neighborhood L) were observed. A drainage area passes under Byron Road and the railroad tracks in Neighborhood L from Town Center. The site reconnaissance revealed that the northwestern portion of Town Center is used as a construction headquarters with several portable trailers/buildings used as construction offices for the various companies working to facilitate construction and development of the .town of Mountain House and Mountain House Creek. Portable fencing surrounds some of the areas and groupings of construction materials and equipment [including an observed portable approximately 300-gallon aboveground storage tank (AST)] are located throughout this area. A well with a non-PCB containing transformer on a utility . pole is located northwest of most of the construction portables and a second non-PCB containing transformer.is located to the west of the construction portables. A large stormwater pipe surrounded by rock, large amounts of thick plastic sheeting, a.dewatering well, and construction activities related to the Mountain House Creek were observed in the northwestern portion of Town Center. Underground and overhead utilities.are located along the northern and eastern boundaries. The'northeastern portion of rs _. �a CONDOR a i