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In Spring 2012, perchlorate and arsenic were both detected above the current drinking water standards in several well depth intervals as deep as 160 feet. These detections were unexpected based on previous sampling results from the other deep wells. Purging and re-sampling of all MP-2 intervals were completed in July 2012 to confirm that these arsenic and perchlorate detections are truly representative of groundwater chemistry in the aquifer, and to ensure that these detections were not influenced by well construction. Analytical laboratory results confirmed the previous detections at groundwater flow depths between 35 feet and 160 feet below ground surface (bgs).
Spring Valley RAB
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