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MONITORING AND REPORTING PROGRAM ORDER NO. 99-142 -2- <br />WILLIAM LONG, SCOTT LONG, AND LONG RANCH, INC. <br />SAN JOAQUIN COUNTY <br />DESIGNATED DISPOSAL AREA MONITORING <br />The Discharger shall monitor the soil within the designated disposal areas to ascertain whether <br />the nitrate-nitrogen loading in the cropland is in excess of that required by the crop. The soil <br />samples shall be representative of the various areas of discharge and any variance in soil type. <br />A minimum of two composite soil samples shall be collected from the discharge areas. <br />Composite soil samples shall not exceed 4 to 1 ratio. Each soil sample shall be collected and <br />analyzed for the following compounds: <br />Compounds Units Sampling Frequency Reporting Frequency <br />Salinity mg/kg Annual' January Report <br />Nitrogen mg/kg Annual' January Report <br />Phosphorus mg/kg Annual' January Report <br />Potassium mg/kg Annual' January Report <br />Annual samples shall be collected prior to the onset of the rainy season. <br />GROUNDWATER MONITORING <br />Groundwater samples shall be collected for analysis after the monitoring well has been adequately <br />purged. Purging is defined as either three well volumes or until stabilization of temperature, pH, and <br />electrical conductivity. <br />After installation and development, all monitoring wells shall be measured for depth to water and <br />shall be sampled and analyzed for baseline concentrations of general minerals (consisting of calcium, <br />magnesium, potassium, sodium, chloride, sulfate, nitrate, TDS, alkalinity series, pH, and hardness), <br />boron, phosphate, Total Kjeldahl Nitrogen, and ammonia. In addition, the sample from the <br />upgradient well shall be analyzed for a Nitrogen stable isotope ratio analysis for Nitrate (815N). Upon <br />collection and analysis of baseline groundwater samples, the following monitoring program shall be <br />implemented: <br />Compounds <br />Depth to Groundwater2 <br />Nitrate <br />TDS <br />Units <br />0.01 feet <br />Mg/1 <br />Mg/1 <br />Sampling Frequency' <br />Semi-Annual3 <br />S emi-Annual3 <br />S emi-Annual3 <br /> <br />The groundwater frequency may be reduced to annual, collected at the height of the dry season (summer), if <br />that after five years of monitoring, compound concentrations have not varied significantly from background. <br />2 A standard reference elevation (measured in feet mean sea level) for each monitoring well point-of- <br />measurement shall be provided. Groundwater levels must be measured prior to sampling. <br />3 Semi-annual samples shall be collected at the height of the wet and dry seasons (i.e. winter and summer, <br />respectively). <br />In addition, the on-site supply well shall be sampled and analyzed during the first, third, and fifth year <br />of monitoring. The groundwater sample shall be analyzed for the same compounds as listed in the <br />table above. Measurements for groundwater levels may be deleted if well head access is unavailable. <br />Upon written request from the Discharger, analyses for Nitrate and TDS may be deleted after the fifth <br />year, provided that significant changes in water quality have not occurred.