ASTM E 2717 : 2018

1.1.1Averages Method—The Averages Method provides an estimate of the annual environmental load for the average U.S. single-family home based on 2000 U.S. Census2 and 2007 U.S. Census Data3 and U.S. EPA/625/R-00/008 characterization of residential wastewater flows.4

1.1.2Unique Product Parameters Method—The Unique Product Parameters Method provides an estimate of the annual environmental load, where the home/product parameter values are the same as those used for the Averages Method except for estimated amounts of chemical contaminants listed in Table 1 or average total annual use of products as listed in Table 1, or both.

1.1.3Adjusted Averages Method—The Adjusted Averages Method provides an estimate of the annual environmental load, where home/product parameter values differ from those used for the Averages Method, except that chemical contaminants associated with products do not vary. (Table 1 remains the same for: Typical Water Contaminants, Estimated Amount of Contaminant in Product (%), and the Percent Waste.)

1.1.4Additional/Alternative Chemicals Method—The Additional/Alternative Chemicals Method provides an estimate of the annual environmental load, of chemicals used that are not listed in Table 1.

1.1.5The Unique Product Parameters Method, Adjusted Averages Method, and Additional Chemicals Method may be used in combination with each other.

1.3.1Estimates of environmental load do not include organic matter common for urine, feces, and vomit.

1.3.2Estimates of environmental load do not include bulk food waste such as kitchen scraps.

1.3.3Estimates of environmental load do not include bulk cellulose waste such as toilet paper.

1.3.4Estimates of environmental load do not include other solid wastes, such as wrappers, not covered by the waste groups covered in 1.3.1 through 1.3.3.

1.3.5Actual environmental load may vary depending on types and amounts of chemicals used in a specific home and the number of people in the home.