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The Johnson Co., Inc. Montpelier, VT. Indirect Discharge Permit Monitoring and Siting Tasks for Agri-Mark dba Cabot Creamery. Indirect Discharge Permit (IDP). Compliance monitoring Application site identification and mapping Engineer’s Inspection. Compliance Monitoring Schedule.
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The Johnson Co., Inc.Montpelier, VT Indirect Discharge Permit Monitoring and Siting Tasks for Agri-Mark dba Cabot Creamery
Indirect Discharge Permit (IDP) • Compliance monitoring • Application site identification and mapping • Engineer’s Inspection
Compliance Monitoring Schedule • Groundwater sampling in February, May, August and September from 6 monitoring wells at 3 designated fields in Cabot, Marshfield, and Wheelock • Surface water sampling (upstream and downstream of the monitored field) in February, May, August and September from surface waters in Marshfield and Wheelock • Groundwater sampling in June, August and September from 6 monitoring wells in Cabot’s Sprayfield system in Cabot • Land application washwater sampling in February, May, August and September; and Monthly Permeate and sprayfield pond sampling during the sprayfield operating period • Washwater sampling for analysis using the EPA TCLP methods at end of Permit cycle
Compliance Reporting • Results of quarterly groundwater and surface water sampling are submitted to the State following receipt of the lab reports • A Water Quality Evaluation of the previous 5 years’ data submitted at the end of each Permit cycle • Results of the EPA TCLP analysis submitted at the end of each Permit cycle • Engineer’s inspection reports submitted annually
Site Identification and Mapping • Performed after receipt of Landowner Agreement • Check agricultural fields for ground slope, distances from water supplies, surface water, property lines and residences, soil types; and depth to groundwater and bedrock within 3 feet of the surface • Generate site evaluation worksheets and site maps for submittal to the State
Application Rate Calculation • Perform watershed delineation of the receiving water associated with the agricultural field • Comparative streamflow analysis to determine low median monthly (LMM) flow rate when streamflow gage data does not exist • Check that daily application rates do not exceed one-tenth of the LMM, and if so, limit the application to the 10:1 dilution ratio
Summary • Water quality monitoring demonstrates continued compliance with the IDP conditions • Currently there are 69 landowners and 256 fields • Cabot maintains 162% of the acreage required for operation of the land application program which is well above the minimum 120% required by the IDP.