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_ MOUNTAIN HOUSE NEIGHBORHOODS RH ODS K AND L INITIAL STUDY 5.ENVIRONMENTAL CHECKLIST T HAZARDS I neighborhood. Information about abandoned gas wells discussed in the Phase I r ESA for the Neighborhoods K and L sites is summarized below. The mapping of abandoned gas wells and investigation of appropriate closures have been completed for Neighborhoods K and L.According to the Department of Oil, Gas, and Geothermal Resources records,one abandoned exploration well k is located in the northwestern comer of Neighborhood L. The well was non- productive for oil or natural gas,was abandoned,and received closure shortly after it was drilled.The well summary report indicates that the well was plugged with cement to 5 feet below the ground surface(bgs),the casing was cut, and'/- inch-thick steel plates were welded on the top of the casing. No productive gas wells currently exist within 500 feet of Neighborhoods K and L(Condor, 2004a). i Additional Exterior Site Observations I r During the Phase I ESA site reconnaissance conducted for Neighborhoods K l4 �j and L,debris was observed in the southeastern and northeastern portions of Neighborhood K and along the southern boundary of Neighborhood L. The debris included soil, broken concrete, rusted metal items, and household debris. A pesticide storage area was also identified near the garage on Neighborhood L (Condor,2004a). Environmental Database Search _ Environmental database searches of known hazardous materials sites within one-quarter mile of the proposed project were conducted by Environmental Science Associates in 2011 in preparation of this Initial Study to identify hazardous materials releases with the potential to affect soil and groundwater in ' Neighborhoods K and L. The State Water Resources Control Board Geotracker �-, database(SWRCB,2011) and the California Department of Toxic Substances I Control Envirostor database(DTSC, 2011)websites were reviewed. In addition, environmental investigation records available on these websites were reviewed to assess the potential for soil and groundwater contamination to exist on Neighborhoods K and L. Environmental cases that were identified during the environmental database search are described below. No environmental cases were identified in the immediate vicinity of Neighborhood K. The following hazardous materials sites were identified in the vicinity of a Neighborhood L(see Figure 5.7-1), due to releases from abandoned fuel-related I pipelines and are discussed under"Fuel-Related Pipelines"above: I - ■ Chevron Mountain House Site No. 1, Byron Road i ■ Chevron Mountain House Site No. 2, Byron Road F € ; Chevron Mountain House Site No. 3, Byron Road The following three other listed hazardous materials sites were considered to ' have a low potential to affect soil or groundwater at Neighborhoods K or L for the +, following reasons: (9mm) 5-89