Marcellus Shale Coalition (MSC).  The Marcellus Shale Coalition (MSC) works with exploration and production, midstream, and supply chain partners in the Appalachian Basin and across the country to address issues regarding the production of  natural gas from the Marcellus and Utica Shale. Judith Herschell is an active member of the Legislative Committee,Technical Committee and Water Sampling Recommendation Practice and has been in vited to join the Research Collaborative