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0 Phase II Site Assessment Work Plan CUEVAS PROPERTIES 1400-1410 South California Street and 504-518 East Charter Way, Stockton, California At the request of Mayra Cuevas, Advanced GeoEnviron mental, Inc. (AGE) has prepared this Phase 11 Site Assessment Work Plan for the property located at 1400- 1410 South California Street and 504-518 East Charter Way, Stockton, California. A map showing the location of the site has been included as Figure 1. A plot plan of the site showing building locations, site features and the proposed boring locations is included as Figure 2. This work plan is prepared as required by the San Joaquin County Environmental Health Department (SJCEHD) for procurement of a Drilling Permit. A Well and Boring Permit Application, Master File Record (MFR) and associated fees are attached. Additional the scope was developed at the request of Mr. John Yokum. Upon SJCEHD approval of the permit package, AGE will schedule field work. AGE will provide SJCEHD with a minimum of 72 -hours prior notice for a grout inspection. INTRODUCTION A Phase I Environmental Site Assessment Report (Report) prepared by AGE identified that an unassessed historical gasoline station is located adjacent to the subject property. Due to the close proximity, and up- to equi-gradient position to the property, and the absence of any site assessment data, this site is of potential environmental concern to the subject property. Based upon the findings in the Report and the following conditions, AGE has proposed the following scope of work. SCOPE OF WORK AGE proposes to advance a total of three soil borings at the site. The approximate locations of the borings is illustrated on Figure 2. All borings will be advanced to a minimum depth of 35 feet bsg for collection of soil -vapor and grab groundwater samples. A total of two soil vapor will be collected from each proposed boring at depths of 5 and 10 feet bsg. Thereafter, the borings will be advanced to a minimum total depth of 35 feet bsg for collection of grab groundwater samples. All soil borings will be advanced with a truck mounted direct push drilling rig equipped with 1.25 -inch probe rods. Once the total depth of the borings have been reached and grab groundwater samples have been collected the borings will be backfilled with Portland cement. The cement mixture will not exceed six gallons of water per 94 pound bag of cement. The boreholes will be backfilled using tremie pipe and under the direction of San Joaquin County Environmental Health Department staff. AGE will notify SJCEHD a minimum of 48 -hours prior to performance of field work to arrange the grouting inspection. Advanced GeoEnvironmental, Inc.