TMDL Implementation Planning
About TMDL IPs
For information on TMDL Implementation Plans
in the Rappahannock-Rapidan regions, see the following pages:
Frequently Asked Questions
What happens after the TMDL Study is complete?
- As stream monitoring continues to occur, it allows
for water quality improvements to be recorded as they are being achieved;
What if it is not feasible to reach Water Quality Standards due to nature or uncontrollable factors?
DEQ's focus in this area is to ensure that water quality goals are appropriate and worth the resources that will need to be expended to achieve them. In some of the streams, fecal coliform bacteria counts contributed by wildlife results in standards violations. In order to address this issue, the Commonwealth has developed a secondary contact recreation use. This new designated use will become effective pending EPA approval. To reclassify a specific stream's designated use, the state must demonstrate that the source of bacterial contamination is natural and uncontrollable by effluent limitations and BMPs through a special study called Use Attainability Analysis (UAA).
Is there a list of Best Management Practices that might be employed in urban areas?
Each TMDL is specifically tailored to address the conditions and circumstances that pertain to that impaired water. Many urban area BMPs used in the past to reduce human bacteria loading from failing septic systems and leaking sewer lines include education on septic pump-outs and a santitary sewer inspection and maintenance program. Also beneficial are controlling urban wash-off from parking lots and roads through ordinance enactment aimed at reducing fecal loads from pets, improved garbage collection and street cleaning.
Is there a list of Best Management Practices that might be employed in agricultural areas?
Again, each TMDL is specifically tailored to address
the conditions and circumstances that pertain to that impaired water.
Many agricultural BMPs used successfully in the past to lower bacteria
levels include livestock fencing from streams, reducing stormwater run-off
in barnyards and feedlots by additional buffering in the riparian zone,
and manure management practices. In residential areas, addressing failing
septic systems and straight pipes have been very effective.
Rappahannock-Rapidan Regional Commission
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