Hazardous waste left over from Truckee River Regional Parks days as the town dump has been discovered in the park.A California Integrated Waste Management Board investigation found hazardous levels of lead, cadmium, copper, and zinc in park soil. The affected area is about 200- by 300-feet in size, east of the tennis courts and near the disc-golf course. The park land is owned by the Truckee Sanitary District, and leased to the Truckee-Donner Recreation & Park District.The Nevada County Community Development Agency report on the investigation lists the Truckee Sanitary District as the responsible party.Grant Eisen, with the Nevada County Department of Environmental Health, said while there are no known immediate impacts on public health, the materials can be hazardous.There was a concern for public exposure through dust and things like that, Eisen said.Steve Randall, general manager for the Truckee-Donner Recreation & Park District, said the park was the site of the towns dump from the mid-1940s to the early 60s, and said the dump was responsible for the materials.The Truckee-Donner Recreation & Park District will meet with the Truckee Sanitary District, Nevada County Department of Environmental Health, and the California Integrated Waste Management Board to discuss cleanup options, Randall said.He said the entire affected area is closed for the winter, but when the snow melts in the spring park staff will put up fencing and signs to keep the public away until the site is considered safe again.The Closed, Illegal, and Abandoned Site Program investigation began Aug. 22 and 23 2006, and the final report was completed in December, said Lanny Clavecilla, with the California Integrated Waste Management Board.The investigation involved surface inspection and trenching at various depths, and cost $36,000, Clavecilla said.Eisen said possible solutions include removing the materials or capping and securing it and he wasnt aware of any groundwater contamination. Clavecilla said in an e-mail waste management is recommending a partial clean closure, in which the remainder of un-cleaned waste would be covered.Impacts to groundwater and the Truckee River have not been determined, said Clavecilla.Site remediation may be run by the California Integrated Waste Management Board, or could be run through a private contractor, Eisen said, but how long it takes, how much it costs, and what it involves has not been determined.Truckee Sanitary District General Manager Thomas Selfridge said as the property owners, the sanitary district would work closely with the recreation and park district, and said they will look into grant funding from the state for cleanup.