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Shea Homes- Northern California Langston II 4943.009.007 Phase I Environmental Site Assessment Condor Earth Technologies, Inc., Phase I Environmental Site Assessment Report, Neighborhood D, Mountain House and San Joaquin County, California, August 3, 2016. Condor performed a phase I environmental site assessment in 2016 that included the Property. The assessment identified three RECs: former agricultural use of the Property, a former Shell pipeline with some crude oil contamination of soil and groundwater, and old 55-gallon drums located in a small farm complex at the southern portion of Neighborhood D and east of the Property. Condor cited their former testing for agricultural chemicals and stated that the results indicated that there was no potential hazard to public health. Since the farm complex was not a part of Neighborhood D, Condor stated that no environmental concerns related to the location posed a risk to the Property. The report also included a summary of Condor's environmental review of remediation activities for soil contaminated from the release of petroleum hydrocarbons from the former Shell pipeline, which crossed through Neighborhood D. Shell excavated several areas of contaminated soil and backfilled the excavations with engineered fill. The Central Valley Regional Water Quality Control Board issued a No Further Action letter on November 4, 2011, indicating that remaining concentrations of petroleum constituents in soil did not pose a threat to human health. 3.0 RECORDS REVIEW 3.1 PROPERTY RECORDS 3.1.1 Title Report/Ownership The Title Report lists recorded land title detail, ownership fees, leases, land contracts, easements, liens, deficiencies, and other encumbrances attached to or recorded against a subject property. Laws and regulations pertaining to land trusts vary from state to state and the detail of information presented in a Title Report can vary greatly by jurisdiction. As a result, ENGEO utilizes a Title Report, when provided to us, as a supplement to other historical record sources. A Preliminary Title Report for the Property was not provided at the time of publishing this report. 3.1.2 Environmental Liens and Activity Use Limitations The Client-based environmental questionnaire completed by Brad Slinkard indicated that he is not aware of any environmental cleanup liens recorded against the Property. 3.2 HISTORICAL RECORD SOURCES The purpose of the historical record review is to develop a history of the previous uses or occupancies of the Property and surrounding area in order to identify those uses or occupancies that are likely to have led to recognized environmental conditions on the Property. 3.2.1 Historical Topographic Maps/Aerial Photographs/Sanborn Maps Historical USGS topographic maps, aerial photographs, and Sanborn Fire insurance maps were reviewed to determine if discernible changes pertaining to the Property had been recorded. EDR provided the following maps and photographs, presented in Appendices C, D, and E. ENGEOJuly 2, 2020 Expect Excellence-