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AMENDED MONITORING AND REPORTING PROGRAM NO. R5-2006-0078-B 2 <br /> Prior to sampling, groundwater elevations shall be measured and the wells shall be purged at <br /> least three well volumes until pH and electrical conductivity have stabilized. Depth to <br /> groundwater shall be measured to the nearest 0.01 feet. Water table elevations shall be <br /> calculated and used to determine groundwater gradient and direction of flow. Samples shall <br /> be collected using approved EPA methods. <br /> Groundwater monitoring shall include, at a minimum, the following.- <br /> GROUNDWATER <br /> ollowing:GROUNDWATER MONITORING TABLE <br /> Type of Sampling and <br /> Constituents Units Sample eportingFrequency <br /> Groundwater elevation 0.01 Feet Measurement Annually <br /> PH S.U. Grab Annually <br /> Electrical Conductivity (EC) umhos/cm Grab Annually <br /> at 25 °C <br /> Total Dissolved Solids mg/I Grab Annually <br /> Nitrates as Nitrogen mg/I Grab Annually <br /> Ammonia as Nitrogen mg/I Grab Annually <br /> Aluminum Pg/I Grab Annually <br /> Arsenic Ng/I Grab Annually <br /> Barium Ng/I Grab Annually <br /> Boron Ng/I Grab Annually <br /> Calcium Ng/I Grab Annually <br /> Copper Pg/I Grab Annually <br /> Chloride mg/I Grab Annually <br /> Iron Ng/I Grab Annually <br /> Lead ug/I Grab Annually <br /> Manganese ug/I Grab Annually <br /> Potassium Pg/I Grab Annually <br /> Sodium Pg/I Grab Annually <br /> Sulfate mg/I Grab Annually <br /> Zinc ug/I Grab Annually <br />