The USEPA is revising the Total Coliform Rule (TCR) and is considering new possible distribution system requirements as part of these revisions. As part of this process, the USEPA is publishing a series of issue papers to present available information on topics relevant to possible TCR revisions. This paper was developed as part of that effort. The objectives of the issue papers are to review t...

List of Tables Table 1 Advantages and disadvantages of sediment toxicity tests (modified from ASTM 2003a). Table 2 Rating of selection criteria for estuarine or marine amphipod sediment toxicity testing (ASTM 2003a). Table 3 Comparison of habitat characteristics and other life history parameters of four estuarine or marine amphipod species used in sediment toxicity tests (ASTM Table 4 Recommend...

Background and Disclaimer The USEPA is revising the Total Coliform Rule (TCR) and is considering new possible distribution system requirements as part of these revisions. As part of this process, the USEPA is publishing a series of issue papers to present available information on topics relevant to possible TCR revisions. This paper was developed as part of that effort. The objectives of the is...

Researchers at the University of Massachusetts quantified dermal, airborne and Dislodgeable Foliar Residues (DFR) of three reduced risk pesticides, azoxystrobin, carfentrazone-ethyl, and halofenozide. Dosimetry techniques were used to assess the exposure of volunteer golfers to these pesticides under worst-case scenarios during the play of 32 rounds of simulated golf. All exposures resulted in ...

s or groundwater contain chemicals of concern, there is the ors to migrate from the subsurface to nearby basements, sed spaces. The Johnson and Ettinger (1991) model and its ication 4674) are at this time the most widely used algorithms of chemical vapors to enclosed spaces. To facilitate use of this nvironmental Protection Agency (USEPA) distributes heets and a comprehensive guidance document ...

Safe discharge of untreated wastewater and scarcity water is still a burning issue facing mankind today. The current study was carried out to analyze the concentration heavy metals in drinking sources from some selected districts Michika, Nigeria. Atomic Absorption Spectrophotometer (AAS) used analysis samples boreholes wells. respective mean for borehole well 0.0286 0.0209 Nickel, 0.2051 0.397...

In this study, PM2.5 was analyzed for heavy metals at two sites in industrial northeast China to determine their sources and human health risks during heating non-heating periods. A positive matrix factorization (PMF) model determined sources, US Environmental Protection Agency (USEPA) entropy weight methods were used assess risk. metal concentrations higher the period than period. period, coal...

The objective of this research was to assess soil conservation practices for improving water quality of return flows from rill irrigation in the Yakima River Basin, Washington, by combining patch application of polyacrylamide (PAM) with an additional erosion control practice. A 2-year field study was conducted that combined PAM with (1) check dams, (2) surge irrigation, (3) surface drains, and ...

Abstract Inhalation exposure to diesel exhaust in the railroad work environment causes significant and quantifiable cancer risks many workers. Diesel has been identified as a known human carcinogen by International Agency for Research on Cancer (“IARC”) potential United States Environmental Protection (“USEPA”), California Agency’s Office of Health Hazard Assessment (“OEHHA”), National Institut...

The findings, interpretations, and conclusions expressed in this paper are entirely those of the authors. They do not necessarily represent the view of the World Bank, its Executive Directors, or the countries they represent nor do they represent those of USEPA.