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ATTACHMENT B <br /> MODIFIED MONITORING AND REPORTING PROGRAM NO. 91-25015 <br /> GENERAL ORDER FOR LAND DISPOSAL <br /> OF GROUND WATER FROM CLEANUP OF <br /> PETROLEUM FUEL POLLUTION <br /> Type of Sampling <br /> Constituents Units Sample Frequency <br /> Specific Conductivity umhos/cm Grab Monthly <br /> PH pH units Grab Monthly <br /> Flow gpd Cumulative Monthly <br /> Total Petroleum Hydrocarbons mg/l Grab Monthly** <br /> Benzene ,ug/l 'Grab Monthly* <br /> Ethylbenzene ,ug/l -Grab Monthly* <br /> Toluene ,ug/l Grab Monthly* <br /> Xylene ,ug/l Grab Monthly* <br /> Lead (total)* ,ug/l Grab Monthly** <br /> Total Nitrogen (as N) ug/l Grab Monthly* <br /> i <br /> * If lead is in ground water. <br /> 1 <br /> 1)Analyses shall be conducted weekly for four consecutive weeks following initial discharge <br /> from the treatment system. 2) If any sample shows detectable TPH, Benzene, Ethvlbenzene, <br /> Toluene, or Xylene, the Discharger shall immediately resample and reanalyze the effluent for <br /> the detected constituent(s), and shall continue sampling the effluent on a weekly basis until the <br /> constituent(s) concentrations are below detection. <br /> GROUND WATER MONITORING: <br /> Prior to construction, plans and specification for ground water monitoring and/or extraction wells <br /> shall be submitted to the Board staff for review and approval. <br /> Quarterly reports are required in Section 2652(d)of the Underground Tank Regulation, Chapter 16, f <br /> Division 3, Title 23, of the California Code of Regulations. Recommended reporting formats are <br /> included in the Tri-Regional Recommendations and Appendix A. Ground water monitoring results, <br /> volumes of extracted ground water and product, and remediation systems operational information <br /> must be included. I <br />