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✓ .fir (b) Samples will be analyzed by a certified lab for trichloroethylene (TCE) , arsenic and selenium. The TCE will be tested in accordance with EPA test methods 601 and 602 . b. Wellhead Injection Water and Filtrate (a) Testing of the filtrate solids for hazardous materials shall be conducted at the time of each filter change. (b) Grab samples shall be collected at the sampling valve at the wellhead and used for laboratory analysis for physical and chemical characteristics. (c) Temperature, annular pressure, and injection pressure shall be measured at the wellhead. (d) Injection rate/flow rate shall be measured in the supply line immediately before the wellhead. (e) All monitoring and recording equipment shall be calibrated on a regular basis. The permittee shall submit, to the Director, a report describing the calibration procedures and the frequency at which the equipment will be calibrated. (f) The permittee shall submit, to the Director, a report identifying the types of tests and methods used to gen- erate the monitoring data as specified by 40 CFR §136. 3 or Appendix III of 40 CFR §261. When the analytical method for a particular parameter is not specified in either 40 CFR §136. 3 or Appendix III of 40 CFR §261, the permittee must obtain EPA approval of the types of tests and methods used to generate the monitoring data. This report must be submitted for approval by EPA a minimum of thirty (30) days prior to collecting monitoring data for the first Quarterly Report and any time the monitoring procedures are changed or modified for subsequent reporting periods. (g) The permittee shall notify the Director 30 days prior to collecting the first set of samples and any time the permittee plans to change the method of collecting or analyzing samples. Unless the Director approves any requested changes in the methods of sampling and analysis the permittee shall not deviate from the ap- proved sampling and analysis plan. 17