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MONITORING AND REPORTING PROGRAM ORDER NO. R5-2015-0012 4 <br /> HUMAN SERVICES AGENCY, 145 SOUTH SUTTER STREET, STOCKTON, CA 95202 <br /> IN-SITU REMEDIATION OF PETROLEUM HYDROCARBONS <br /> SAN JOAQUIN COUNTY <br /> All wells that are purged shall be purged until pH, temperature, conductivity and dissolved <br /> oxygen are within 10% of the previous value. <br /> Field test instruments (such as those used to test pH and dissolved oxygen) may be <br /> used provided that: <br /> 1. The operator is trained in proper use and maintenance of the instruments; <br /> 2. The instruments are calibrated prior to each monitoring event; <br /> 3. Instruments are serviced and/or calibrated by the manufacturer at the <br /> recommended frequency; and <br /> 4. Field calibration reports are submitted as described in item (b) of the "Reporting" <br /> section of this MRP. <br /> IN-SITU DISCHARGE MONITORING <br /> 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: Discharge Monitoring Requirements <br /> Parameters Units Type of <br /> Sample <br /> Injected Volume gallons per day Meter <br /> Amendment(s) Added pounds per day Measured <br /> AMENDMENT ANALYSIS <br /> Prior to use, amendments shall be analyzed for the constituents listed in Table 5. The analysis <br /> should be done on a mixture of the amendment and deionized water at the estimated <br /> concentration that would be injected during the project. <br /> Table 5: Amendment Analytical Requirements <br /> Constituent Method' Maximum Practical Quantitation <br /> Limit /L z <br /> Volatile Organic Compounds EPA 8020 or 8260B 0.5 <br /> General Minerals' Various Various <br /> Metals, Total and Dissolved EPA 6010/6020/200.8 Various <br /> Semi-Volatile Organic EPA 8270 Various <br /> Compounds <br />