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Revised Monitoring and )orting Program No. 93-100 2 Lawrence Livermore National Laboratory Site 300— Pit 1 ' San Joaquin County 2. The Discharger shall comply with the monitoring program provisions of Title 23 for groundwater, in accordance with Monitoring Specifications in Standard Provisions and Reporting Requirements (September 1993). 3. The Discharger shall operate and maintain a groundwater monitoring network that complies with the applicable provisions of Title 23 §2550.7 and in accordance with this MRP as approved by the Executive Officer. The Discharger shall collect, preserve, and transport groundwater samples in accordance with the approved LLNL Livermore Site and Site 300 Environmental Restoration Project Standard Operating Procedures, dated June 1 1997 (UCRL-MA-109 1 15 Rev. 3 and future revisions). 4. The Discharger shall determine the groundwater flow rate and direction in the uppermost aquifer and in any zones of perched water and in any additional zone of saturation monitored pursuant to this MRP, and report the results quarterly, including the times of highest and lowest elevations of the water levels in the wells. 5. Groundwater samples shall be collected from the point-of-compliance wells, background wells, and any additional wells added as part of the approved groundwater monitoring network. Samples shall be collected in accordance with the methods and frequency specified in Table 1,and analyzed for the constituents of concern and monitoring parameters as specified in Tables 2, 3 and 4. 6. Annually, prior to the anticipated rainy season, but no later than 30 September, the Discharger shall conduct an inspection of the facility. The inspection shall assess damage to the groundwater monitoring equipment and diversion and drainage facilities, and shall include the Standard Observations contained in Section X11.5 of Standard Provisions and Reporting Requirements. The Discharger shall complete any necessary construction, maintenance, or repairs by 31 October. The Discharger shall submit with the Annual Report a description of the results of the inspection and the repair measures implemented, including photographs of the problem and the repairs. 7. The Discharger shall inspect all precipitation, diversion, and drainage facilities for damage within 7 days following major storm events. Necessary repairs shall be completed with in 30 days of the inspection. The Discharger shall report any damage and subsequent repairs in the first quarterly report following the completion of the repairs. The report shall include photographs before and after the repairs.