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(009) Agriculture Interfaces with the TMDL Program.
Denton, Debra*,1, Smith, David2, 1 US Environmental Protection Agency Region 9, Sacramento, CA, USA2 US Environemntal Protection Agency Region 9, San Francisco, CA, USA
ABSTRACT- Agriculture Interfaces with the TMDL Program. Denton, DL and David Smith. U.S. Environmental Protection Agency, Sacramento, CA 95814. The California Sacramento and Central Valleys have many agricultural related parameters, such as diazinon, chlorpyrifos, selenium, EC, boron, organic enrichment, and low dissolved oxygen as needing total daily maximum loads to be developed in the next several years. There will be a need to achieve implementation through several aspects, including source reduction, parameter treatment technologies, possible removal of agricultural land from production, and water management practices that reduce agricultural return flows. Currently, pesticide demonstration practices studies are underway to evaluate practices which may reduce pesticide runoff from stone fruit orchards. In addition, the development of diazinon transport model is being used to identify and quantity both the spatial and temporal sources of diazinon in the upper Sacramento watershed. Stakeholders have developed a diazinon management strategy to identify on-site practices for runoff reduction, selection of pest management strategies, and application methods that will reduce diazinon runoff. This paper will highlight the range of agricultural problems/solutions, and implementation practices being conducted and considered in the TMDL program.
Key words: TMDL, pesticides, agriculture
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