1. 40 CFR §136, 2017. Guidelines Establishing Test Procedures for the Analysis of Pollutants.
2. 40 CFR §261, Appendix VIII, 2010. Hazardous Waste Management System.
3. 40 CFR §423, Appendix A, 2015. Toxic and Priority Pollutants under the Clean Water Act.
4. 40 CFR §435.53, 1995. Oil and Gas Extraction Point Source Category, Subpart E—Agricultural and Wildlife Water Use Subcategory.
5. Organic and inorganic composition and microbiology of produced waters from Pennsylvania shale gas wells;Akob;Appl. Geochem.,2015