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Soil &Groundwater Excavation Work Plan Advanced Environmental Concepts, Inc. V 4.6 Bio-Remediation The gasoline impacted soil will be turned on a daily basis to promote aeration of the volatile compounds. Aeration of the gasoline impacted soil will follow allowable rates of limited aeration in y accordance with San Joaquin Valley Unified Air Pollution Control guidelines. it is estimated that the average organic content of the gasoline impacted soil will range between 50 and 500 mg/Kg,which correlates to a daily aeration volume between 120 cubic yards to 600 cubic yards. An application for "Authorization of Uncontrolled Soil Aeration"has been completed for this project, although approval to proceed has not been granted. See Appendix D for the Aeration Permit Application. The soil will also be kept moist to enhance the growth of any naturally occurring organisms thereby assisting in the degradation of the diesel impacted soil. After two weeks of land farming five equally spaced soil 6„ samples will be collected from the spoils pile to evaluate the extent of gasoline volatilization and degradation of the diesel range hydrocarbons. If there is no appreciable decrease in diesel concentrations from the initial spoils pile sampling,AEC will enhance the process with the addition of laboratory formulated microbes. y AEC will use previously prepared and formulated naturally occurring bacteria to enhance the degradation of the diesel impacted soil. The organisms are grown in pure form, preserved, and then y combined. The Solmar bacteria are supplied in dry form. They become fully activated when presoaked for a minimum of 4 hours in lukewarm water. Two gallons of water are required for each pound of culture formulation. For a more enhanced degradation, a nutrient mixture of nitrogen, phosphorous, and potassium is added to the soil 24 hours prior to the addition of the microbes. This allows the microbes to have a readily available food source to increase population prior to degrading the hydrocarbons. The spoil pile will also remain moist to enhance population growth. Prior to each addition of the nutrient/microbes the pile will turned to promote an aerobic environment. V V !r Ir y 4 6" y Project: AEC 97V-1805 .ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND. 4. 4400 ASHE ROAD,#206 . BAKERSFIELD.CA 93313 805/831-1646 FAX 8051831-1771