NEW DIESEL RULE LITMUS TEST FOR CALIFORNIA REFINERS, REGULATORS

California refiner/marketers and regulators alike are testing their limits as preparations continue for stringent new state diesel fuel specifications that come into play Oct. 1. The California diesel specs, which go far beyond federal requirements that take effect the same date, are a microcosm of pollution control challenges that loom ahead in California. They also are seen as a litmus test for how U.S. refiner/marketers will deal with operating and supply concerns related to accommodating