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G E M Phase II ESA Work Plan March 19, 2019 the sanitary sewer. Mr. Schamber noted waste in the OWS was recently removed by Ramos Environmental. Evidence of chemical staining was not observed around the OWS. Several floor drains were located within the building, including one reported by Mr. Schamber to be located beneath the parts washer currently used and another floor drain reported to be located at the western end of the building in an area being used to store numerous automobile parts. A floor drain was observed beneath an automobile in the covered work area just west of the building. No evidence of chemical staining was observed around this drain; however, the area around the drain and the interior of the drain could not be closely observed due to the presence of the automobile. Based on the long-term use of the OWS onsite and historic automobile repair activities, GIEIM considers the OWS to be a REC for the subject property. Objective and Methodology The objective of the Phase II ESA is to evaluate current subsurface conditions in select on-site areas. To meet this objective, soil gas and soil samples will be collected and submitted to a laboratory for chemical analysis; analytical results will be compared to established screening levels. The results and recommendations, if any, will be presented in a report. Scope of Work To evaluate the current subsurface conditions at select on-site locations, a Phase II ESA will be performed that will include collecting soil gas and soil samples for chemical analysis. Field sampling locations and procedures are summarized in the following sections. Pre-Field Activities Prior to conducting field activities associated with the proposed assessment, the pre-field tasks described below will be completed. Health and Safety G E M will prepare a site-specific Health and Safety Plan for the scope of work as required by the Occupational Health and Safety Administration (OSHA) Standard "Hazardous Waste Operations and Emergency Response" guidelines (29 CFR 1910.120). The document will be reviewed and signed by G E M personnel and subcontractors performing work at the Site. Permitting G E M will prepare a boring permit application with appropriate fee for submittal to San Joaquin County Environmental Health Department (SJCEHD). G E M will provide at least 48 hours' notice prior to field work to the SJCEHD inspector. Field Activities Utility Clearance Before conducting subsurface work at the Site, the proposed sampling locations will be cleared for underground utilities by a private utility locator. Underground Services Alert North (USA North) will be notified at least 48 hours prior to intrusive field activities. Page 2 of 4