Harrison Avenue crews find underground tanks | TahoeDailyTribune.com

Harrison Avenue crews find underground tanks

Tom Lotshaw

Working on the total rebuild of Harrison Avenue in South Lake Tahoe, Sierra Nevada Construction unearthed what appear to be three old heating oil tanks this week.

The construction company hopes to mitigate the 4-by-10-foot tanks in-ground rather than dig them out and remove them, but is awaiting final word from the El Dorado County Environmental Health Department on whether that will be allowed.

One tank was found at the corner of Alameda and Harrison avenues. Two more tanks were found extending underneath the building that houses South Tahoe Standup Paddle.

Samples have been taken from inside the three tanks and from the soil around them for analysis, to determine what is in them and if they have been leaking out into the surrounding ground.

If the tanks are allowed to be mitigated in place and left in the ground, crews would pump the tanks out, triple-rinse them and fill them with concrete. If not, the tanks would have to be excavated and removed along with any contaminated soils, project manager Mitch Grayson said.

"We're moving past that area and continuing to work in other areas now to keep moving forward and stay as close to on schedule as we can while we're waiting for this issue to be resolved," Grayson. "By Tuesday we should have the final word."

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