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District reports PFOA average below California response level; PFAS treatment designs advance
Summary
Lake Arrowhead Community Services District reported a blended treated-sample PFOA result of 7.1 ppt, lowering the district average to 8.1 ppt—below California's 10 ppt response level—and said design work for PFAS removal at Bernina and Cedar Glen is progressing toward 90% completion.
The Lake Arrowhead Community Services District reported on Feb. 25 that a recent quarterly blended treated sample returned a PFOA result of 7.1 parts per trillion (ppt), lowering the district's average PFOA to 8.1 ppt—below the California response level of 10 ppt. Operations Manager Matt Brooks said the district is continuing to blend supplies and bring additional wells online to maintain compliance.
Brooks told the Board the district followed Battelle's recommendation to sample after a major storm and took an influent sample at the Grass Valley Treatment Plant on Feb. 13; he said, "I will report those results when they are received." He also reported that the design team is advancing PFAS removal equipment designs for the Bernina and Cedar Glen treatment plants toward 90% completion and that Chambers Group visited Bernina to review CEQA steps for the building that will house the treatment equipment.
General Manager Catherine Cerri told directors that grant funding has been approved to support procurement of PFAS removal equipment and related work at Rimforest. The district is also publicizing a PFAS Filter Rebate Program and coordinating sampling and equipment design milestones; the Board was told additional wells scheduled to return to service will assist blending operations.
