Document ZXyEMx787BqxZnLE7neM9gaJ

B6-67E WATER NEWSLETTER ANQ RESEARCH t DEVELOPMENT NEWS M.W. FEB 23 1976 I j.oo POLYCHLORINATED BIPHENYLS ARE BEING PHASED OUT OF PRODUCTION by Monsanto, the sole U.S. producer. Production of the chemicals Is being limited to 40 million pounds per year for closed systems such as trans formers and capacitors until satisfactory substitutes are found. The company action is voluntary but follows proposed Environmental Protection Agency action that would limit the substance to 1 part per million in water ways. Current limits on fish consumed are 5 ppm in the United States but recant testing has detected levels far exceeding federal limits in water and sediment. MONS 031997 piuoieme recently toxa tne nrn mmuax ^ou , nawi Resources Association. Because they are d< ,r is lost to evaporation, an important consideration rid West. Where erosion is excessive, the pits serve . , .hould they gradually get filled, the adjacent cast overburden--if left loose and uncompacted--will store water to the extent of its void capacity." In the future, the same potential for water storage is possible when oil is extracted from shale. Future developers of oil from shale, Corbett believes, mistakenly favorunderground mining in areas where shale can be surface mined. "As I see it, the only advantage of underground mining of hale OVer eurfaCA mtnlnrr annoA fhA omH rrtnmonf m 1 ovfvami N HONS 031998