of one composite sample per every 40 acres of each wastewater irrigation area, but at least one composite sample must be obtained from every wastewater irrigation area. Soil samples from separate wastewater irrigation areas may not be composited together. Sampling procedures shall employ accepted techniques of soil science for obtaining representative analytical results. Soil samples should be taken within the same 45-day time frame during each calendar year, analyzed within 30 days of collection, and compiled by December 31. Baseline values of the parameters shall be determined and described in the Technical Report. Composite soil samples shall be comprised of no less than 15 randomly sampled cores obtained from each of the following soil depth zones: Zone 1: 0-6 inches; and Zone 2: 6-24 inches Soil samples shall be submitted to a soil testing laboratory along with a previous crop history of the site, intended crop use, and yield goal. Soil test reports shall include nutrient recommendations for the crop yield goal. Chemical and nutrient parameters and analytical procedures for laboratory analysis of soil samples from wastewater irrigation areas shall include the following: Minimum Analytical Parameter Method Reporting units (MAL) 2:1 (v/v) water to Reported to 0.1 pH units after pH NA soil mixture calibration of pH meter Obtained from Electrical the SAR water 0.01 dS/m (same as mmho/cm) Conductivity saturated paste extract From a 1 N KCl 1 mg/kg (dry weight basis) soil extract For determination of Organic plus Total Kjeldahl Ammonium 20 mg/kg (dry weight Nitrogen (TKN) Nitrogen. Procedures that use Mercury (Hg)
of one composite sample per every 40 acres of each wastewater irrigation area, but at least one composite sample must be obtained from every wastewater irrigation area. Soil samples from separate wastewater irrigation areas may not be composited together. Sampling procedures shall employ accepted techniques of soil science for obtaining representative analytical results. Soil samples should be taken within the same 45-day time frame during each calendar year, analyzed within 30 days of collection, and compiled by December 31. Baseline values of the parameters shall be determined and described in the Technical Report. Composite soil samples shall be comprised of no less than 15 randomly sampled cores obtained from each of the following soil depth zones: Zone 1: 0-6 inches; and Zone 2: 6-24 inches Soil samples shall be submitted to a soil testing laboratory along with a previous crop history of the site, intended crop use, and yield goal. Soil test reports shall include nutrient recommendations for the crop yield goal. Chemical and nutrient parameters and analytical procedures for laboratory analysis of soil samples from wastewater irrigation areas shall include the following: Parameter Method Minimum Analytical (MAL) Reporting units pH 2:1 (v/v) water to soil mixture NA Reported to 0.1 pH units after calibration of pH meter Electrical Conductivity Obtained from the SAR water saturated paste extract 0.01 dS/m (same as mmho/cm) From a 1 N KCl soil extract 1 mg/kg (dry weight basis) Total Kjeldahl Nitrogen (TKN) For determination of Organic plus Ammonium Nitrogen. Procedures that use Mercury (Hg) 20 mg/kg (dry weight
WQG20-Draft-Permit.docx