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• WORKPLAN EVALUATION MONITORING PROGRAM CORRAL HOLLOW SANITARY LANDFILL SAN JOAQUIN COUNTY, CALIFORNIA TABLE OF CONTENTS 3.0 EVALUATION MONITORING PROGRAM...................................................................... 5 1.0 INTRODUCTION..........................................................................................................1 EMP APPROACH...................................................................................................... 5 2.0 BACKGROUND............................................................................................................1 3.2 2.1 SITE LOCATION........................................................................................................ 2 6 2.2 SITE GEOLOGY......................................................................................................... 2 3.3 2.3 GROUNDWATER CONDITIONS................................................................................ 3 2.4 GROUNDWATER CHEMISTRY.................................................................................. 4 3.0 EVALUATION MONITORING PROGRAM...................................................................... 5 5.0 CONCLUSION............................................................................................................15 FIGURES Figure 1 Site Location Map Figure 2 Existing Groundwater Monitoring Wells Figure 3 Proposed Groundwater Monitoring Wells Figure 4 Typical Groundwater Monitoring Well Construction Detail ATTACHMENTS Attachment 1 Project Schedule Attachment 2 Site Health and Safety Plan Revision 1- August 24, 2011 3.1 EMP APPROACH...................................................................................................... 5 3.2 MONITORING WELL LOCATION RATIONALE........................................................... 6 3.3 BOREHOLE DRILLING AND HYDROPUNCHTM SAMPLING ......................................... 7 3.3.1 Well Permitting ........................................................................................ 7 3.3.2 Drilling, Soil Sampling, and Logging Methods ............................................ 7 3.4 3.3.3 HydropunchTM Sampler and Initial Groundwater Sampling ....................... 8 MONITORING WELL INSTALLATION.................................................................... 9 3.4.1 Borehole Reaming and Soil Sampling......................................................... 9 3.4.2 Monitoring Well Construction................................................................... 9 3.4.3 Surveying...................................................................................................10 3.4.4 Monitoring Well Development................................................................. 10 3.4.5 Aquifer Testing.......................................................................................... 3.3.7 Groundwater Sampling and Analysis........................................................ 11 11 3.5 MONITORING WELL INSTALLATION REPORT........................................................ 13 3.6 EVALUATION MONITORING PROGRAM REPORT .................................................. 13 4.0 ESTIMATED PROJECT SCHEDULE............................................................................... 15 5.0 CONCLUSION............................................................................................................15 FIGURES Figure 1 Site Location Map Figure 2 Existing Groundwater Monitoring Wells Figure 3 Proposed Groundwater Monitoring Wells Figure 4 Typical Groundwater Monitoring Well Construction Detail ATTACHMENTS Attachment 1 Project Schedule Attachment 2 Site Health and Safety Plan Revision 1- August 24, 2011