SR0084184_SSCRPT - Laserfiche WebLink

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All areas, fields treated with Abolish® 8EC: A. Except as listed below, all water on treated fields must be retained on the treated fields for at least 19 days following application. When drainage begins, water discharge must be released at a volume not to exceed two inches of water over a drain box weir for an additional seven days. Unregulated discharges from these fields may begin after 26 days. 1. For water contained within a tailwater recovery system, ponded on fallow land, or contained in other systems appropriate for preventing discharge, the system may discharge 19 days following the last application within the system unless: (a) The system is under the control of one permittee, then water may be discharged four the application site in a manner consistent with product labeling (14 -day water -hold period). (b) The system includes drainage from more than one permittee, then water must be retained on the site of application for six days before discharged from the application site into the system. (c) Water is on fields within the bounds of areas that discharge negligible amounts of rice field drainage into perennial streams until fields are drained for harvest, then water -hold may be reduced to six days if the commissioner evaluates such sites and verifies the hydrologic isolation of the fields. Emergency release requirements (Salinity damage): The county agricultural commissioner may authorize the emergency release of field water after a minimum 19 -day water -hold period after the last thiobencarb application, following the review of a written application that demonstrates salinity levels are damaging to the crop. A. Applicants for such emergency releases must provide the following information: 1. All information indicated on the emergency release request (Form A), including a description of the severity and extent of salinity damage. 2. Electrical conductivity (EC) measurements, expressed as deciSiemens per meter (dS/m) or microSiemens per centimeter (Ocm), from field water in each paddy suspected of having salinity problems. To most effectively demonstrate salinity problems, measurements should be taken wherever salinity problems are evident. 3. The instrument (make and model) used to determine EC measurements. The instrument must have a sensitivity range that accommodates the full range of EC values in intake and paddy water (usually a range of 0-5.0 dS/m or 0-5,000,uS/cm should be sufficient) and should have a resolution of not less than five percent. The instrument must be calibrated according to the manufacturer's instructions. The applicant must specify the method of temperature compensation (i.e., automatic, conversion table). 4. Who made the EC measurements. 5. The source of irrigation water (e.g., district supply canal, drainage canal, well, etc.). B. An emergency release may be granted only if all of the following conditions are satisfied: 1. All required information is provided.