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Project No. 034-21033 Page No. 3 Geologic and Hydrologic Setting The subject site is located in the San Joaquin Valley, a broad structural trough bound by the Sierra Nevada and Coast Ranges of California. The San Joaquin Valley, which comprises the southern portion of the Great Valley of California, has been filled with several thousand feet of sedimentary deposits. Sediments in the eastern valley, derived from the erosion of the Sierra Nevada, have been deposited by major to minor west -flowing drainages and their tributaries. Near -surface sediments are dominated by sands and silty sands with lesser silts, minor clays, and gravel. The sedimentary deposits in the region form large coalescing alluvial fans with gentle slopes. Data obtained from an environmental investigation site located 3,000 feet to the southeast of the subject site indicates that groundwater in the area of the subject site was first encountered at a depth of approximately 30 feet bgs in 2020 Groundwater monitoring conducted at the above -referenced site indicates that the groundwater flow direction in the vicinity of the subject site is toward the northwest. PROPOSED LIMITED SITE ASSESSMENT PURPOSE Based upon the above -referenced RECs and PAOCs, the purpose of this Phase II LSA will be to assess the presence or absence of TCE and its degradation products in soil beneath the subject site. PROPOSED SCOPE OF WORK General Pre -Field Activities • The Client will be contacted regarding access to the property and scheduling of fieldwork. • Krazan will prepare a site-specific health and safety plan (HASP). • Krazan will mark the proposed boring locations. The local underground utility alert service, USA North, will be contacted for utility marking. USA North marks to property boundaries as a matter of policy, and will not mark privately held property. Krazan will not be responsible for damage to equipment, personnel, utilities, or other property caused by encountering utilities that are not identified prior to subsurface exploration. • Soil borings will be completed using a solid stem auger (SSA) rig, Geoprobe rig and/or hand auger. • A soil boring/vapor permit will be obtained from the San Joaquin County Department of Environmental Health — Site Mitigation Unit (SJCDEH). The SJC permitting requirements include a completing a Master File Record, permit application for each parcel (total of 2 parcels), KRAZAN & ASSOCIATES, INC. With Offices Serving the Western United States 034-21033 WP for LSA Ripon.doc