(1) For purposes of this chapter, the department adopts and incorporates by reference the following documents. All references to these documents in this chapter refer to the edition set out below:

(a) Department Circular DEQ-1, "Standards for Water Works," 2014 edition;

(b) Department Circular DEQ-2, "Design Standards for Public Sewage Systems," 2016 edition;

(c) Department Circular DEQ-3, "Standards for Small Water Systems," 2014 edition;

(d) Department Circular DEQ-4, "Montana Standards for Subsurface Wastewater Treatment Systems," 2013 edition;

(e) Department Circular DEQ-7, "Montana Numeric Water Quality Standards" (June 2019 edition);

(f) Department Circular DEQ-8, "Montana Standards for Subdivision Storm Drainage," 2017 edition;

(g) Department Circular DEQ-10, "Standards for the Development of Springs for Public Water Systems," 2014 edition;

(h) Department Circular DEQ-11, "Montana Standards for Development of Springs for Individual and Shared Non-public Systems," 2002 edition;

(i) Department Circular DEQ-16, "Standards for Hauled Water Cisterns for Noncommunity Public Systems," 2014 edition;

(j) Department Circular DEQ-17, "Montana Standards for Cisterns (Water Storage Tanks) for Individual Non-public Systems," 2002 edition;

(k) Department Circular PWS-5, "Ground Water Under the Direct Influence of Surface Water," 2002 edition;

(l) Department Circular PWS-6, "Source Water Protection Delineation," 1999 edition; and

(m) the U.S. Department of Agriculture's National Soil Survey Handbook (USDA, NRCS, September 1999), and the Soil Survey Manual (USDA, October 1993), which contain a recognized set of methods for identifying the nature and characteristics of soils.

(2) Copies of the documents incorporated by reference in this rule may be obtained from the Department of Environmental Quality, P.O. Box 200901, Helena, MT 59620-0901.