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3.0 Methodology The following areas of concern are included in this assessment: Area of Concern Borings Analysis EPA Method Analyze two (2) selected soil samples (one [1] per boring) for VOCs,TPH, metals via EPA Methods 8260, 8015, and 6010/7470 Former Septic Tank and Two (2) borings (SB1 and Leech Line Vicinity S132) to 25 feet. Analyze two (2) selected groundwater samples (one [1] per boring) for VOCs and TPH via EPA Methods 8260 and 8015 Analyze two (2) soil vapor samples (one [1] per boring) collected at 5 feet bgs for VOCs via EPA Method TO-15 Analyze one (1) selected soil sample (one [1] per boring) for VOCs,TPH, metals via EPA Methods 8260, 8015, and 6010/7470 Grease Trap and Vehicle One (1) boring (SB3) to 25 Washing Area feet or first groundwater Analyze one (1) selected groundwater sample for VOCs and TPH via EPA Methods 8260 and 8015 Analyze one (1) soil vapor sample collected at 5 feet bgs for VOCs via EPA Method TO-15 Notes: EPA=Environmental Protection Agency.VOCs=volatile organic compounds.TPH =total petroleum hydrocarbons. Field activities were conducted on August 6, 2021, as documented in the site photographs in Appendix A of this report. FR contracted GPRS of Fairfield, California to assess the property for any potentially unknown buried features, as well as to clear utility lines in the vicinity of the proposed boring locations. No anomalies indicating the presence of buried underground storage tanks, drums, or other similar potentially unknown features were identified by the private locator and utilities were cleared via ground-penetrating radar (GPR) and/or magnetometer testing. Refer to Appendix A for a photo log of site investigation activities. The private utility locate documentation is included in Appendix B. FR contracted GeoEx Subsurface Exploration of Dixon, California to advance soil borings at the subject property to assess possible contaminants in subsurface materials based on the risk of a release of hazardous materials to the subsurface from operations at the subject property. All of the samples were submitted to Pace National Laboratories of, Mount Juliet,Tennessee, a State of California certified laboratory, using standard Chain of Custody Protocols. Three (3) soil borings were advanced to depths of 25 bgs site using Geoprobe° 6600 truck mounted drilling rig in the vicinity of the former septic tank, leach line, and grease trap, as depicted on Figure 2 at the end of this report. Soil samples were screened in the field at approximate 5-foot intervals using a photoionization detector (PID) for volatile organic compounds at all of the soil borings. Soils recovered were logged using the Unified Soils Classification System (USCS). The assessment Phase II Limited Subsurface Investigation Fulcrum Resources Environmental 2546 Turnpike Road,Stockton, California 95206 202107-8656 7