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IRAP PERFORMANCE ASSESSMENT IMPLEMENTATION SCHEDULE Former Nestl6 USA, Inc. Facility Ripon, CA Date Activity Timeline Measure water levels A Prior to EU-3 shutdown Sample wells for VOCs 6 Prior to shutdown 21-Nov-11 Measure water levels A One hour after shutdown Measure water levels A Two hour after shutdown Measure water levels A Three hour after shutdown 22-Nov-11 Measure water levels A One day after shutdown 23-Nov-11 Measure water levels A Two days after shutdown 28-Nov-11 Measure water levels A One week after shutdown Sample wells for VOCs c S-Dec-11 Measure water levels A Two weeks after shutdown Sample wells for VOCs c 12-Dec-11 Measure water levels A Three week after shutdown Sample wells for VOCs c 19-Dec-11 Measure water levels A Four weeks after shutdown Sample wells for VOCs e 26-Dec-11 Measure water levels A Five weeks after shutdown Sample wells for VOCs Review water level and VOC data and discuss the results with RWQCB. Week of 26-Dec-11 Determine whether to continue or discontinue testing. 2-tan-12 Measure water levels A Six weeks after shutdown Sample wells for VOCs c 9-Jan-12 Measure water levels A Seven weeks after shutdown Sample wells for VOCs c 16-Jan-12 Measure water levels A Eight weeks after shutdown Sample wells for VOCs c 23-Jan-12 Measure water levels A Nine weeks after shutdown Sample wells for VOCs e 17-Feb-12 Submit Evaluation Letter providing an assessment Thirteen weeks after shutdown of IRAP to the RWQCB NOTES: VOCs=volatile organic compounds RWQCB= Regional Water Quality Control Board A=EU-3, EU-4, M-46A, M-47A, M-48A, M-49A,M-50A, M-51A,M-1A, M-1B, M-4B, EW-1, EU-1, EU-2, ED-1, ED-2, EE- A,and EI-1 s= EU-3, EU-4, M-46A, M-47A, M-48A, M-49A,M-50A, M-51A, M-1A, M-113, and EI-1 c= EU-3, EU-4, M-47A, M-50A, M-51A,and M-1 B