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Standards and Guidelines Gradient, Review of Halliburton Energy Services, Inc. Chemistry Scoring Index (2009) MSC, Recommended Practices, Site Planning, Development and Restoration (2012) Universal Well Services, Inc., Environmental Response Plan for Field Operations (2008) API Energy, GHF101, Hydraulic Fracturing Operations – Well Construction and Integrity Guidelines (2009). – Currently under the heading “Technologies” API Energy, GHF201, Water Management Associated with Hydraulic Fracturing, (2010). – Currently under the subheading “Groundwater Quality/Protection” API Energy, GHF301, Practices for Mitigating Surface Impacts Associated with Hydraulic Fracturing, (2011).  -  Currently under the subheading “Habitat/Ecosystem Protection”