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San Joaquin County EHD-PHS Bioremediation June 26, 1995 Page 3 Remediation Cell The remediation cell will be located on the eastern part of the property. The impacted soil will be evenly placed on an existing concrete pad contained by(3) six foot high concrete side walls. Straw bales will be used on the open side to complete and isolate the remediation cell. Visqueen will be placed and secured over the straw bales to contain the soil within the biocell. The impacted soil will be covered with 10 mil poly sheeting to minimize any fugitive emissions. The Biocell dimension will be approximately 50'x 251x3'. Remediation of Soils The soil remediation will consist of the biotreatment of the+/- 100 cubic yards of impacted soils. The soil will be inoculated with our proprietary consortia of microbes and enzymes, nutrients and water(biosolution). The inoculmn will be applied in liquid form and allowed to penetrate the soil. Water will then be added to the cell to transport the biosolution and to moisturize the impacted soil in order to achieve and maintain approximately 25%moisture content. The cell will be monitored and moisture conditions periodically to maintain moisture levels. This will allow optimal conditions for the microbes to breakdown the petroleum hydrocarbons present. The remediation cell will remain completely covered with plastic during the treatment process. Conformation Soil Sampling Verification soil sampling will include TPH-Gas\BTEX and conformation sampling will be conducted once Biotreatment is completed. Excavated soil stockpile will be sampled Eight discrete samples will be obtained and composited by the laboratory into two (2)four part composite (ratio: 1 Per 50 cu. yds.). All samples will be sent under chain of custody to state certified laboratory and analyzed by EPA Method 8015/8020 to confirm levels for regulatory acceptance.