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Performance of Innovative/Alternative Onsite Septic Systems for the Removal of Nitrogen in Barnstable County, Massachusetts 1999-2007

Performance of Innovative/Alternative Onsite Septic Systems for the Removal of Nitrogen in Barnstable County, Massachusetts 1999-2007

-based reporting system for performance samples from innovative alternative (I/A) onsite septic systems has been implemented in Barnstable County, Massachusetts. Nitrogen removal data from a total of 557 individual systems; 487 single-family installations and 70 multi-family installations are presented. When systems having four or more samples are considered, 69% of the 297 single-family systems and 60% or the 50 multi-family I/A systems have medians that meet a regulatory discharge standard of 19 mg/L or less of total nitrogen. Results from individual technologies are presented. The difficulties in assessing the performance of I/A technologies using such data are discussed.

5/20/11 at 3:52 pm     0
Investigation Regarding the Issue of Fines in Aggregate Used for Soil Absorption Systems

Investigation Regarding the Issue of Fines in Aggregate Used for Soil Absorption Systems

nwealth of Massachusetts Regulations pertaining to the installation of onsite septic systems require that base aggregate used for leaching structures be “free of iron, fines and dust in place.” Absent of any field testing procedure for aggregate. it is difficult for contractors or inspectors to reasonably ensure adherence to the intent of the regulation. The purpose of the present study was to determine whether any rapid field tests for aggregate quality were in use in other jurisdictions and to research, in a preliminary way, factors for consideration in the assessment of aggregate in the field.

5/20/11 at 3:49 pm     0
The Second Compendium of Information on Alternative Onsite Septic System Technology in Massachusetts

The Second Compendium of Information on Alternative Onsite Septic System Technology in Massachusetts

5/20/11 at 3:47 pm     0
Coliform Contamination of a Coastal Embayment: Sources and Transport Pathways

Coliform Contamination of a Coastal Embayment: Sources and Transport Pathways

bacterial contamination of nearshore water has direct economic impacts to coastal communities through the loss of shellfisheries and restrictions of recreational uses. We conducted seasonal measurements of fecal coliform (FC) sources and transport pathways contributing to FC contamination of Buttermilk Bay, a shallow embayment adjacent to Buzzards Bay, MA.

5/20/11 at 3:24 pm     0
Comparison of Aggregate and Aggregate-Free Leaching Trenches in Onsite Septic Systems

Comparison of Aggregate and Aggregate-Free Leaching Trenches in Onsite Septic Systems

cent years, the Commonwealth of Massachusetts Department of Environmental Protection (MassDEP) has been petitioned by vendors of aggregate-free leaching components to allow reduced sizing compared with standard aggregate-laden leaching systems. While university studies have been used by some industry representatives to substantiate claims that there are negligible environmental consequences to this allowance, there have been no full-scale controlled studies to identify and resolve underlying issues relating to appropriate size reduction allowances prior to this study. This paper describes both preliminary work funded by the Environmental Protection Agency 319(b) Program and a full-scale pilot project completed with supplemental funding from the National Sanitation Foundation (NSF) and involving input from stakeholders from around the United States. The effort, coordinated though NSF, continues today to develop a testing protocol for evaluating the claims of manufacturers of aggregate-free leaching technology.

5/20/11 at 2:15 pm     0