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Fulcrum Resources Environmental (FR) is pleased to present this work plan for a limited subsurface environmental assessment to investigate the subsurface conditions at the subject property. This is a preliminary investigation to assess shallow subsurface conditions, thus this investigation is intended for screening purposes only. Background Summary of Property Description The property is located at 574 W. Grant Line Road (APN: 233-030-010) and comprised approximately 0.8-acre, occupied by a gasoline station with a convenience store. The subject building comprised a total of approximately 6,600 square feet and housed a convenience store, fishing supply/bait business, and storage spaces. The subject property is located at the southeast corner of the intersection of Grant Line Road and N. Tracy Blvd., within a commercial and residential area. Summary of Hydrology According to the provided 2011 LUST Closure Letter for prior release at the subject property, the reported depth to first groundwater is approximately 5 to 7 feet below ground surface. The available on-line data also indicates a general north/northwesterly direction of groundwater flow. Summary of Site History & Findings with CREC & RECs The previous Phase I assessment has revealed no evidence of recognized environmental conditions in connection with the property except for the following controlled recognized environmental condition (CREC) and Recognized Environmental Conditions (RECs): The subject property has operated as a gasoline service station since at least 1967. Prior to the installation of the current USTs in 1999, three 8,000-gallon USTs were removed from the site in 1998. There are no records on file associated with any other prior generations of USTs (if any) that may have been in use prior to those removed in 1998. Significant soil and groundwater impact was discovered during the removal of the fuel USTs in 1998. Remedial efforts were completed at the property from 2001 to 2008 and included excavation of 300 tons of impacted soil, groundwater extraction, air sparging and vacuum extraction, and ozone sparging. Confirmation soil sampling was completed in 2009. The December 2010 quarterly groundwater monitoring report indicated on-site groundwater contained up to 35,000 parts per billion (ppb) TPH-G, 1,900 ppb ethylbenzene, 3,600 ppb total xylenes, 49 ppb benzene, 14 ppb toluene, and 200 ppb MTBE. Regulatory case closure was requested and received in 2011. No subsurface assessment has apparently been completed at the subject property since the last groundwater sampling in 2010. The residual impact could require additional actions should subsurface work (e.g., UST system upgrades, utility work, property expansion, re- development) be performed on-site in the future. Residual impact that has received regulatory closure but could require future actions (e.g., soil management if excavation occurs) is considered a controlled recognized environmental condition (CREC). 574 W. Grant Line Road, Tracy, CA 95376 Phase II Work Plan -±f}? Fulcrum Resources Environmental