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April 2011995 Project 113-26-04, Work Plan, Mage 7 Placement along Holly Drive west of the tanks, east of the tanks near the property line and east of the store, respectively, depending on the results of the samples obtained from the hand auger bonngs The tasks of the work plan and an estimate for the schedule of the project follow. TASK 1-DEVELOP WORK PLAN AND SITE SAFETY PLAN The site safety plan (Appendix A: Site Safety Plan) will be on-site during all field activities An underground locating service will be employed to identify underground utilities and other possible subsurface obstacles. A minimum of Level D safety equipment is required for all field activities. The work plan and site safety plan will be submitted to and approved by the San Joaquin County Environmental Health Division prior to permitting or field work. TASK 2-DRILL SOIL BORINGS, INSTALL MONITORING WELLS Upon approval of the Work Plan and Site Safety Plan, all required permits will be obtained and the necessary notifications made. A State of California Certified Engineering Geologist, Gary D. Lowe, will supervise the drilling of the seven soil borings and two wells by Parker personnel and V&W Drilling , a state-licensed water well driller. The Parker Environmental standard operating procedures for drilling soil borings and obtaining soil samples are included in the Appendix B: Standard Operating Procedures for Site investigations. The proposed soil bonngs will be located as described above The proposed location of the soil borings may have to be adjusted according to drill-ng accessibility, underground utilities, or obstacles Soil samples will be collected from the borings at approximate intervals of every 2.5-5 feet, for lithologic and hydrogeologic characterization, and for possible chemical analysis The samples will be screened by sensory perceptions or with an organic vapor analyzer or a photo-ionization detector to be qualitatively evaluated for the presence of volatile hydrocarbons. This screening will aid in the selection of the one soil sample per boring to be analyzed at a state-certified lab (McCampbell Analytical, #1644) for TPH-g and BTEX Parker standard operating procedures for collecting organic vapor data are described in the Appendix B. Upon drilling to total depth, groundwater momtonng wells will be installed through the augers as described in Appendix B, and graphically depicted in Figure 3 - Typical Morutoring Well Diagram All soil cuttings will be stored on-site on top of and beneath plastic sheeting pending laboratory analysis for appropriate disposal Parker Environmental Services, 190 East 7th Street, Pittsburg, CA 94565-2317 Phone (415) 439-1024 Fax (415) 439-2566