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Lafferty Communities Oakwood Shores – Area 1 12921.000.003 Modified Phase I Environmental Site Assessment Page | 8 May 28, 2021 5.1 SOIL SAMPLING Soil samples were collected on April 6, 2021, from 16 locations across the Property (Figure 2). Soil samples were collected from 3 to 9 inches below the surface of the existing grade. The 16 soil samples were collected using 4-ounce, pre-cleaned glass gars. Upon collection of samples, a sample label was placed on the sample, including a unique sample number and time and date collected. The soil samples were submitted under documented chain-of-custody to California Laboratory Services, a State-certified laboratory in Rancho Cordova, California. Laboratory analysis of the soil samples included the following target analytes:  OCPs (EPA Method 8081) three 4-point (4:1) composite samples  Arsenic (EPA Method 6020) three discrete samples  Lead (EPA Method 6020) three discrete samples 5.2 ANALYTICAL RESULTS The reported concentrations for OCPs and lead are below the applicable USEPA and CAL-EPA screening levels for residential soil. OCPs were not detected in any of the composite samples. Arsenic concentrations were not detected in any of the discrete samples. Lead concentrations ranged from 2.6 to 4.4 mg/kg, which are below the current residential screening level of 80 mg/kg. The laboratory report is presented in its entirety in Appendix H. 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 completed to review site use and current conditions to check for the storage, use, production, or disposal of hazardous or potentially hazardous materials and to conduct written/oral interviews with persons knowledgeable about current and past site use. The site reconnaissance and records review did not find documentation or physical evidence of soil or groundwater impairments associated with the use or past use of the Property. 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. Based on the findings of this assessment, no RECs, no historical RECs, and no controlled RECs were identified for the Property. ENGEO has performed a modified phase I environmental site assessment in general conformance with the scope and limitations of ASTM E1527-13 and the standards and practices of the All Appropriate Inquiry – Final Rule (40 Code of Federal Regulations Part 312). It is our opinion that the findings of this study are based on a sufficient level of information obtained during our contracted scope of services to render a conclusion as to whether additional appropriate investigation is required to identify the presence or likely presence of a REC.