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s 01 MONITORING AND REPORTING PROGRAM NO. R5-2003-0044 - -3- GENLRAL ORDER FOR LAND DISPOSAL OF GROUNDWATER OR SURFACE WATER FROM CLEANUP OF PETROLEUM FUE1_ POLLUTION Type of Constituents Units Sample Frequency MtBF µg/l Grab Monthly** Lead (total)* µg/l Grab Monthly** Lead (organic) pg/l Grab Monthly**. Methanol µg/l Grab Monthly** Ethanol µg/l Grab Monthly** Tertiary Butyl Alcohol (TBA) µg/l Grab Monthly** Di-isopropyl Ether(DIPS) pgll Grab Monthly** Ethyl Tertiary Butyl Ether(ETBE) µg/I Grab Monthly** Tertiary Aniy] Methyl Ether µg/l Grab Monthly** (TAME) 1,2-Dichloroethane (1,2-DCA) µg/1 Grab . Monthly** 1,2-Dibromoethane (EDB) µg/] Grab Monthly** ,Naphthalene µg/l Grab Monthly** Polynuclear Aromatic Hydrocarbons pg/l Grab ` Monthly** * If Eead is not detected in the'ftrst 2 sampling events, then testing may be discontinued-thereafter, upon approval by Regional Board staff. ** 1) Analvses shall be conducted weekly for four consecutive weeks following initial discharge frnm the treatment system. 2) If any sample shows detectable TPH, benzene.' toluene. ethylbenzene_ xdlen�s. Naphthalene, 1,2-Dichloroethane; 1,2-Dibromoethane, Polynuclear Aromatic Hydrocarbons, Mtl31-- or other oxygenates, the Discharger shall immediately evaluate the treatment system, resample within three days -of laboratory notification and reanalyze the effluent for the detected constituent(s), and shall continue sampling the effluent on a weekly basis until the constituent(s) concentrations are below permitted levels. Once four consecutive weeks are below permitted levels, monthly sampling may be initiated. 3) If a detectable concentration is deterrrtined to be present in wastewater, the frequency will revert back to weekly. 4) If a constituent is not present in the influent sample, then the testing for that constituent may be discontinued;upon approval by Regional Board staff, until detected in the influent. Appropriate quantitation (or reporting)limits are described in Part C.1 of this Order. GROUNDWATER MONITORING The groundwater monitoring program submitted with the Report of Waste Discharge and approved by the Executive Officer, shall constitute the groundwater monitoring program. . Prior to construction, plans and specifications for groundwater monitoring wells and/or.extraction wells shall be submitted to the Regional Board staff for review and approval. Quarterly reports are required in Section 2652(d) of the Underground Tank Regulation, Chapter 16, Division 3, Title 23, of the California Code of Regulations. Recommended reporting formats are included in the Tri-Regional Recommendations and Appendix A. Groundwater monitoring results.