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Fueling Systems, Engineering& Construction Services December 29, 2021 Mr. Jeffrey Wong San Joaquin County Environmental Health Department 1868 East Hazelton Avenue Stockton, California 95205 RE: Site Investigation Workplan for Site Mitigation Well & Boring Permit Application 122 North Wilson Way& 148 North Wilson Way, Stockton, California 95205 APNs: 153-040-210-000 & 153-050-010-000 1.0 INTRODUCTION AND PROJECT OBJECTIVES ENCON Technologies, Inc (ENCON), on behalf of Global Multi Services, Inc. (Project Client) and San Joaquin Marketing Association (Property Owner), has prepared this targeted Subsurface Soil and Soil Gas Investigation Workplan (Workplan) for the Subject Property located at 122 North Wilson Way and 148 North Wilson Way in Stockton,California 95205 (herein after referred to as"Subject Site"). This Workplan has been prepared per the San Joaquin County Environmental Health Department(SJEHD) Site Mitigation Well&Boring Permit Application requirements,and describes the proposed scope of work in order to determine the presence, or absence of any chemicals of concern beneath the Subject Site as a result of the recognized environmental conditions (RECs) as identified in the Phase I ESA Report prepared by Partner Engineering and Science, Inc. (Partner), dated September 13, 2021. The highlights of the proposed investigation are listed below: • The purpose of the proposed Phase II ESA subsurface soil and soil gas investigations are to satisfy an environmental site assessment due diligence function for a pending real estate transaction by the Project Client and potential buyer and not a compliance directive from a State regulatory agency. • The proposed sampling plan involves twelve(12) soil borings and three(3) soil gas probes in shallow soils as shown in Figure 2. • All of the proposed exploratory soil and soil gas borings will be drilled with a Geoprobe direct-push drill rig, and the investigation will be limited to shallow soils with a maximum sample depth of 10 ft-bgs for soils and 5 ft-bgs for soil gas. • The proposed site sampling involves two contiguous parcels(APN#153-040-210-000) and (APN#153-050-010-000) as shown in Figure 2 and the field drilling and sampling will be completed in one full day between 7:30 am through 4:00 pm.