Mary Callahan, THE PRESS DEMOCRAT
Samples taken from key Russian River tributaries downstream of the massive Tubbs fire scar have so far tested within the expected range for a suite of 30 pollutants and other traits that might betray contamination related to ash, burned wreckage and recent firefighting efforts, according to North Coast water regulators.
The results are just the earliest in the long-term monitoring planned for the 1,500-square-mile river watershed. Scientists want to ensure that critical water supply and wildlife habitat aren’t exposed to heavy metals, excess sediment and other pollutants potentially leached from thousands of burned structures, vehicles and unknown materials incinerated in the October firestorm.
Staff with the North Coast Regional Water Quality Control Board also caution that the results reflect a limited number of test sites — three from below the burn zone and one from above.
But the outcome of three testing rounds conducted last month nonetheless contributes to faith in the success of a multiagency, all-hands-on-deck effort to deploy more than 30 miles of straw erosion-control wattles and tens of thousands of gravel bags to filter runoff from winter rains and direct it away from storm drains and streams, Senior Environmental Scientist Katharine Carter said.