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Shea Homes- Northern California Langston II 4943.009.007 Phase I Environmental Site Assessment FEATURE TYPE OBSERVATIONS Stained Soil/Pavement No stained soil or pavement was observed within the Property at the time of our reconnaissance. Stressed Vegetation No signs of stressed vegetation were observed on the Property at the time of our reconnaissance. Solid Waste/Debris Construction related debris was observed at the subject property. Debris consisted of wood, plastics, and concrete. Stockpiles/Fill Material Small stockpiles of material were observed on the Property during the reconnaissance. Wastewater No wastewater conveyance systems were observed at the Property during the reconnaissance. Wells No wells were found within the Property during our site reconnaissance. Septic Systems No septic systems were found within the Property during our site reconnaissance. 4.3 ASBESTOS, LEAD, AND PCB-CONTAINING MATERIALS An asbestos, lead, and PCB-containing building material survey was not conducted as part of this assessment. No structures are currently located on the Property. 5.0 INTERVIEWS Mr. Brad Slinkard of Shea Homes completed a Client-based environmental site assessment questionnaire pertaining to applicable past and present uses and physical characteristics of the Property and surrounding properties. In the questionnaire, Mr. Slinkard did not identify potential environmentally related issues with the Property. The questionnaire is presented in its entirety in Appendix F. Mr. Dave Sargent of Mountain House Developers, LLC completed a Key Site Manager-based environmental site assessment questionnaire pertaining to applicable past and present uses and physical characteristics of the Property and surrounding properties. In the questionnaire, Mr. Sargent identified potential environmentally related issues with the Property, associated with the former leaking pipeline, but Mr. Sargent confirmed the past remediation associated with the release. The questionnaire is presented in its entirety in Appendix F. 6.0 FINDINGS AND CONCLUSIONS This assessment included a review of local, state, tribal, and federal environmental record sources, standard historical sources, aerial photographs,fire insurance maps and physical setting sources. A reconnaissance of the Property was conducted to review site use and current conditions to check for the storage, use, production or disposal of hazardous or potentially hazardous materials and interviews with persons knowledgeable about current and past site use. The site reconnaissance and records review identified documentation but no physical evidence of soil or groundwater impairments associated with the use or past use of the Property; a past release from petroleum pipelines (as explained below) impacted soil and groundwater. A review of regulatory databases maintained by county, state, tribal, and federal agencies found no documentation of hazardous materials violations or discharge on the Property and did not identify contaminated facilities within the appropriate American Society for Testing and Materials (ASTM) search distances that would reasonably be expected to impact the Property. ENGEOJuly 2, 2020 Expect Excellence-