Preserving the history of a site while doing environmental cleanup was the goal of the Nevada County Environmental Health Department when five underground storage tanks were neutralized at the top of Broad and Commercial Streets in Nevada City.  Director Wesley Nicks says the pie shaped property at 436 Broad Street,  which is now a Real Estate office used to be a gas station in the early days .

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GeoCon Consultants, a National Hazmat clean up company,  installed six monitoring wells to test for leakage and  groundwater  contamination. Nicks says they used hydrogen peroxide to treat the soil.

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Cleanup completed, the wells were capped earlier this week and Nicks says he will issue a closure letter on the case .   Five years ago Nevada county Environmental Health Department took over forty clean-up sites in the county .

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Funds for the clean up comes from a fraction of a penny that is added to gasoline sales in the state.