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rainwater from the paved 17 acre site used for storage and <br /> inventory of finished wood products. Although the actual <br /> concentration of contaminants in the contaminated ground water is <br /> much lower than the concentrations experienced due to spills and <br /> leaks in the retort area , the overall mass balance of <br /> contamination may shift toward the problem of disposal of <br /> contaminated rainwater at the site. The problem is compounded by <br /> the fact that Marley has paved this entire area with asphalt and <br /> provided a' storm water retention basin in response to a request <br /> by the San Joaquin Flood Control and Water Conservation <br /> District. This storm water retention basin serves as a collector <br /> for all non-process related contamination occurring on the site. <br /> Examples include residual drips of wood preserving solution from <br /> finished products , rainwater that has come in contact with <br /> surface quantities of wood preserving solution , and any other <br /> f trace quantities of wood preserving solution which collect on the <br /> 1 asphalt surface. <br /> Marley is in the process of doing a thorough review of production <br /> procedures within the storage area for possible implementation of <br /> a program to segregate contaminated rainfall from non - <br /> contaminated rainfall . Briefly described , the procedure would <br /> entail the storage of treated wood in a relatively small area , <br /> Ltherein reducing the volume of contaminated stormwater runoff. <br /> These procedures are further discussed under the "remedy " <br /> section. <br /> 5 <br />