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Califia LLC River Islands Phase 2 5044.000.008 Phase I Environmental Site Assessment NAME OF AGENCY RECORDS California State Water Resources We reviewed the GeoTracker website. There are no sites within Control Board a mile of the Property. We reviewed the EnviroStor website. There is one site within a Department of Toxic Substances mile of the Property, the River Islands Middle Control School/Elementary School site. This site does not pose an environmental risk to the Property. 2.5 INDOOR AIR QUALITY An evaluation of indoor air quality, mold, or radon was not included as part of the contracted scope of services. The California Department of Public Health has conducted studies of radon risks throughout the state, sorted by zip code. Results of the studies indicate that three tests were conducted within the Property zip code, with none of the tests exceeding the current EPA action level of 4 picocuries per liter{pCi/L}') In accordance with ASTM E2600-15 (Tier 1) (Standard Guide for Vapor Encroachment Screening on Property Involved in Real Estate Transactions); there are no potential petroleum hydrocarbon sources for vapor intrusion within 1/10 mile of the Property or volatile organic compound (VOCs) sources within 1/3 mile of the Property. 3.0 SITE RECONNAISSANCE 3.1 METHODOLOGY ENGEO conducted a reconnaissance of the Property on February 12, 2020. The reconnaissance was performed by Ana Lua, a Staff Engineer of ENGEO. The Property was viewed for hazardous materials storage, superficial staining or discoloration, debris, stressed vegetation, or other conditions that may be indicative of potential sources of soil or groundwater contamination. The Property was also checked for evidence of fill/ventilation pipes, ground subsidence, or other evidence of existing or preexisting underground storage tanks. Photographs taken during the site reconnaissance are presented in Figure 4. We did not observe the interior of the structures at Paradise Road Ranch. 3.2 GENERAL SITE SETTING The majority of the Property is currently used for agricultural purposes, including annual row crops such as corn, alfalfa, pumpkins, and other seasonally harvested crops. Paradise Road and West Stewart Road cross through the Property, along with several agricultural roads. There are several structures on the Property, including three residential structures, several barns and sheds, and stalls associated with an existing horse ranch. The majority of the Property is surrounded by USACE levees along Old River and Paradise Cut, and new levees have been constructed to their interior. ' California Department of Public Health-Radon Program— (https://www.cdph.ca.gov/Programs/CEH/DRSEM/CDPH%20Document%2OLibrary/EMB/Radon/Radon% 20Test%20Results.pdf). ENGEO March 12, 2020 —Expect Excellence-