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i ATTACHMENT C CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD CENTRAL VALLEY REGION fi MONITORING AND REPORTING PROGRAM NO. R5-2009-0149-XXX I FOR IN-SITU GROUNDWATER REMEDIATION AT SITES WITH VOLATILE ORGANIC COMPOUNDS, "NITROGEN COMPOUNDS, PERCHLORATE, PESTICIDES, SEMI-VOLATILE COMPOUNDS AND/OR PETROLEUM HYDROCARBONS j EGGIMAN'S HYDRAULIC GARAGE SAN JOAQUIN COUNTY This Monitoring and Reporting Program (MRP) describes requirements for monitoring a groundwater treatment system. This MRP is issued pursuant to Water Code Section 13267. The Discharger shall not implement any changes to this MRP unless and until a revised MRP is issued by the Executive Officer. As appropriate, Regional Board staff shall approve specific sample station locations prior.to implementation of sampling activities. All samples should be representative of the volume and nature of the discharge or matrix ! of material sampled. The time, date, and location of each grab sample shall be recorded on the sample chain of custody form. GROUNDWATER MONITORING As shown on Figure Al, there are 11 monitoring wells (MW-1 through MW-11) and five proposed ozone injection wells (OS-1s, OS2s, OS3 are soil vapor injection; OS1d, OS2d, OS4, and OS-5 are aquifer injection) associated with this site. The groundwater j monitoring program for these wells and any treatment system wells installed subsequent to the issuance of this MRP shall follow the schedule below. Monitoring ' wells with free phase petroleum product or visible sheen shall be monitored, at a minimum, for product thickness and depth to water. The volume of extracted groundwater, if applicable, shall also be provided in quarterly monitoring reports. Sample collection and analysis shall follow standard EPA protocol. e The monitoring wells and/or injection wells shall be sampled according to the schedule in r Table 1 and the samples analyzed by the methods in Table 2, as follows: I