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Nnv-02--99 02:09P COPPEP ENTERPRISES 1 209 727 9773 P.03 <br /> 3.0 Soil Treatment <br /> After placement, the soil will be allowed to aerate to remove the gasoline <br /> contamination from the soil. To expedite this process, the soil will be periodically <br /> turned over. Turning and fluffing the soil will enhance the aeration process by <br /> exposing more surface area of the soil. This will be accomplished by mechanical <br /> discing or ripping the soil with a towed behind farm implement. The soil will be <br /> turned over on a weekly basis during the aeration period. <br /> 4.0 Soil Screening <br /> During the aeration process, the soil will be monitored to determine the presence <br /> of contamination. The monitoring will consist of both visual inspection and field <br /> screening techniques. A photolonization detector (PID) will be used as a semi- <br /> quantitative field screening method. If the soils on the aeration pad have a <br /> strong organic or chemical odor or display a high organic vapor reading on the <br /> PID (greater than 10 ppm) then they will be considered to still contain <br /> contamination and the weekly soil discing will continue. Soils with these <br /> characteristics are most likely to be contaminated with hydrocarbons. <br /> 5.0 Soil Sampling <br /> When the soils no longer contain an odor or display PID readings greater than <br /> 10 ppm, then the soil will be analyzed to determine if any hydrocarbon remains <br /> in the soil. A four-into-one composite soil sample will be collected from the <br /> aeration pad. The soils will be analyzed for TPH gasoline and BTEX_ <br /> The sample results will be submitted to the San Joaquin County representative <br /> upon receipt. Based on the analytical results and upon the recommendation / <br /> approval of the San Joaquin County representative the soil discing will cease or <br /> discing will continue. Should the analytical results indicate the presence of <br /> contamination, then the soil discing will continue and the soil will be resampled. <br /> This will continue until the contamination has been removed or reduced to a level <br /> acceptable to the San Joaquin County representative. This material will be kept <br /> onsite and used for landscaping needs, <br /> 2 of 2 <br />