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AMENDED MONITORING AND REPORTING PROGRAM ORDER NO. IR-2015-0012-044 <br /> <br />3 <br />TRANSMISSION STORE <br />SAN JOAQUIN COUNTY <br />Field test instruments (such as those used to test pH and dissolved oxygen) may be used <br />provided that: <br />The operator is trained in proper use and maintenance of the instruments; <br />The instruments are calibrated prior to each monitoring event; <br />Instruments are serviced and/or calibrated by the manufacturer at the recommended <br />frequency; and <br />Field calibration reports are submitted as described in item (b) of the "Reporting" section <br />of this MRP. <br />IN-SITU DISCHARGE MONITORING <br />3. The Discharger shall monitor daily the discharge of water and amendments that are injected <br />into the groundwater according to the requirements specified in Table 4. Each amendment <br />addition shall be recorded individually, along with information regarding the time period over <br />which the amendment was injected into the aquifer. <br />Table 4: Dischar e Monitorinq Requirements <br />Parameters Units Type of Sample <br />Inject Volume gallons per day Meter <br />AMENDMENT ANALYSIS <br />4. Prior to use, amendments shall be analyzed for the constituents listed in Table 5. The <br />analysis should be done on a mixture of the amendment and deionized water at the <br />estimated concentration that would be injected during the pilot project. <br />Table 5: Amendment Analytical Requirements <br />Constituent Method' <br />Maximum Practical <br />Quantitation Limit (ug/L)2 <br />Total Petroleum Hydrocarbons as Gasoline and Diesel EPA 82608 50 <br />Total Petroleum Hydrocarbons as Motor Oil EPA 82608 100 <br />Volatile Organic Compounds EPA 82608 0.5 <br />Semi-Volatile Organic Compounds EPA 8270 5.0 <br />General Minerals3 Various Various <br />Metals, Total and Dissolved' EPA 601013 Various <br />pH EPA 150.1 0.1 <br />1 Or equivalent EPA Method that achieves the Maximum Practical Quantitation Limit, <br />2 All concentrations between Method Detection Limi and the Practival Quantitation Limit shall be reported as an estimated value <br />3 General Minerals include: alkalinity, bicarbonate, potassium, chloride, sulfate, total hardness, nitrate, nitrite, ammonia <br />4 Metals include: arsenic, barium, cadmium, calcium, total chromium, copper, iron, lead, magnesium, manganese, mercury, <br />molybdenum, nickel <br />ESTABLISHMENT OF BACKGROUND CONCENTRATION VALUES <br />5. Historical hydrocarbon concentrations in all Site wells have been established by routine <br />periodic groundwater sampling. Background metals concentrations were established by <br />sampling wells MW-2R and MW-3R in April 2015.