7.1 Waste Application Rate Calculations

Transcription

1 7.1 Waste Calculations Several crops are suitable for use in Evergreen s land application areas. Each potential crop was evaluated for sludge application rates using nutrient uptake information (crop nitrogen requirement, CNR) from Table 3-2 (Amount of N nutrients removed per ton of forage dry matter) Arkansas Nutrient Management Planner's Guide, University of Arkansas, Division of Agriculture or Table 6.6 (Plant nutrient uptake by specified crop and removed in the harvested part of the crop) Agricultural Waste Management Field Handbook, Chapter Role of Plants in Waste Management. Yield assumptions are based on averages from multiple literature sources from University of Arkansas Cooperative Extension Service (Extension Service) and United States Department of Agriculture s Natural Resources Conservation Service (NRCS). Additional CNR uptake information was gathered from Table 4-11 of the Process Design Manual for Land Treatment of Municipal Wastewater, USEPA, October Table 4 shows a tabulation of the resulting sludge application rates and the amount of acreage necessary for the various crops based on the PAN calculated in Table 3. Table 5 shows the total acres required for potential crops. These calculations are derived from averaged sludge waste percent solids and average tons applied of each sludge waste from 2008 to Evergreen may elect to apply sludge to fields on a rotating basis. During any non-farm years, natural grasses will be allowed to grow on the soil that is not receiving sludge. Since sludge will not be applied during years the fields are not farmed, the uptake of natural grasses has not been considered in the nutrient uptake calculations for determining acreage requirements. Table 4. Calculated sludge application rates. Nitrogen Requirement (lb/ac-yr) (tons/acre-year) = Nitrogen Requirement (CNR) in (lb/yr) divided by Plant Available Nitrogen (PAN) in (lbs/ton of sludge) 50:50 Ash Lime Mud Main Ditch ASB Spoils Press GLD/Ash Bahia Grass Bermuda Grass 300 1,505 1, ,046 1,037 Bluestem 212 1,063 1, Corn Cotton Dallisgrass Fescue Oats Orchard grass Ryegrass June 29, 2012 (Revised August 23, 2012) 11

2 Nitrogen Requirement (lb/ac-yr) (tons/acre-year) = Nitrogen Requirement (CNR) in (lb/yr) divided by Plant Available Nitrogen (PAN) in (lbs/ton of sludge) Ash Lime Mud Main Ditch ASB Spoils 50:50 GLD/Ash Press Sorgham Sp. (Sudan grass/johnson grass/milo) , Soybeans 223 1,118 1, Sunflowers Wheat Table 5. Total acres required per sludge product Ash Lime Mud Main Ditch 2,009 Dry 3,962 Dry 2,551 Dry ASB Spoils 3,320 Dry 50:50 GLD/Ash 15,746 Dry Acres Required (Existing Sources) Bahia Grass Bermuda Grass Bluestem Corn Cotton Dallisgrass Fescue Oats Orchard grass Ryegrass Sorgham Sp. (Sudan grass / Johnson grass / Milo) Soybeans Sunflowers Wheat * Press has not been Land Applied. June 29, 2012 (Revised August 23, 2012) 12

3 7.2 Soil Analysis In accordance with Permit 4579-WR-4 all soil results are summarized and submitted to ADEQ as part of the annual report. Table 6 shows the averaged results of the soils analysis from samples collected from 2008 to 2011 for fields A, D, and E. The remaining fields (B, C, and F) have not been applied to over the past five years and soil data is not available. Soil samples are taken from several locations across a land application field. These soil samples are then mixed and composited to make a single sample for each acre area. The portion of field E located south of the railroad track is not being utilized due to its position in the 100-year flood plain. The remaining five fields contain approximately 459 acres with about 85% (390 acres) of this amount being available for sludge waste application. Current land application areas are located outside the 100-year flood plain according to the Flood Insurance maps (Figure 5) for this area (FEMA Community Panel Number 05069C0325D dated March 16, 2009). Table 6. Average soil characteristics for fields A, D, and E. Parameters Field A Field D Field E Dry Weight Basis Dry Weight Basis Dry Weight Basis Arsenic, mg/kg Cadmium, mg/kg Chromium mg/kg Copper, mg/kg Lead, mg/kg Mercury, mg/kg < Molybdenum, mg/kg Nickel, mg/kg Nitrate as N, mg/kg Phosphorus, mg/kg Potassium, mg/kg Selenium, mg/kg Sodium mg/kg Zinc, mg/kg CEC, mg-eq/100g Specific Conductance (µs/cm) ph (su) June 29, 2012 (Revised August 23, 2012) 13

4 Blevins, Terri From: Sent: To: Subject: Attachments: Ungerank, Ralph Tuesday, August 28, :36 AM Blevins, Terri FW: 4579-WR-5_PN_ Mgmt Plan Pages Revised r.pdf 4579 WR 5 Sent: Monday, August 27, :01 PM Revised WMP pages. Only changes were on page 11 (Table 4, cotton numbers) & Page 12 (Table 5, cotton numbers). Thanks, Kyle Sent: Monday, August 27, :50 PM To: Kyle Hathcote Yes Sir, Thanks for your help. Sent: Monday, August 27, :48 PM The only change will be for cotton ontable 4 and Table 5, and I m just going to keep the revision date on the bottom of the page August 23, Do all the other numbers work for you? Sent: Monday, August 27, :45 PM To: Kyle Hathcote Thanks for your help. I will route the draft (Hopefully for the last time) when I get the updated WMP Sent: Monday, August 27, :40 PM See Below 1

5 Oats Table 3.2, Arkansas Nutrient Management Planner s Guide N removed per ton of forage dry matter (44 lbs/ton), Yield (3 tons/acre) = 132 lbs/acre, Ryegrass Table 4 11, Process Design Manual for Land Treatment of Municipal Wastewater Convert 200 kg/ha to 178 lbs/acre, Cotton Table 4 11, Process Design Manual for Land Treatment of Municipal Wastewater Convert 75 kg/ha to 66.9 lbs/acre, (Revising pages and will send ASAP today), Wheat Table 4 11, Process Design Manual for Land Treatment of Municipal Wastewater Convert 160 kg/ha to 143 lbs/acre, and Sunflowers Table 6.6 (Plant nutrient uptake by specified crop and removed in the harvested part of the crop) Agricultural Waste Management Field Handbook, Chapter 6.0 Role of Plants in Waste Management % N removed of the dry harvested material: Stover (1.5% ton N / 100 tons dry harvested material = 30 lbs N/ ton ) & Yield (4 tons/acre) = 120 lbs/acre and Grain 3.57% lbs N / 100 lbs dry harvested material & Yield (1,100 lbs/acre): 39.3 lbs/acre = 120 lbs/acre (stover) lbs/acre (grain) = lbs/acre (page attached). Give me a call with questions. Thanks, Kyle Kyle Hathcote Senior Scientist GBMc & Associates 219 Brown Lane Bryant, AR Office: Cell: Sent: Monday, August 27, :46 AM To: Kyle Hathcote Could you give me a call when you get in? Sent: Thursday, August 23, :56 PM Cc: Russell Mclaren; Kelly Bryant Colby, I apologize for the delay in getting this to you. Please find attached Evergreen s sludge management plan s revised pages regarding the additional crops and their respective nitrogen uptake rates to be included in the permit. If you have any questions or need additional information, please let me know. 2

6 Thanks, Kyle Kyle Hathcote Senior Scientist GBMc & Associates 219 Brown Lane Bryant, AR Office: Cell: Sent: Thursday, August 23, :34 PM To: Russell Mclaren; Kyle Hathcote; Subject: 4579-WR-5_PN_ Kelly and GBMc, Attached is the latest version of the draft permit. Colby 3