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1 Monitoring Well Elevation of PVC Depth to Groundwater Elevation of Gradient Dtredton Groundwater 1 MW-4 8129/02 13 56 feet 8 21 feet +535 East MW-4 12/10/02 13 S6 feet 8 97 feet +4.59 East MW-5 2/12/00 14 00 feet 6 77 feet +723 East MW-5 4128/00 14 00 feet 6 78 feet +722 East/Northeast 1 MW-5 9/20100 14 00 feet 8 29 feet +571 Northeast MW-5 12/27/00 14 00 feet 9 02 feet +498 North MW-5 7130/01 14 00°eel 8 53 feet +547 East/Northeast MW-5 11/5/01 14 00 feet 9 40 feet +460 East (r MW-5 2/27/02 14 00 feet 7 99 feel +601 East MW-5 5/21/02 14 00 feet 8 31 feet +569 East MW-5 8129/02 14 00 feet 8 61 feet +539 East MW-5 12/10/02 14 00 feet 1 9 38 feet +462 East (f MW-6 2112/00 14 75 feet 7 26 feet +749 East MW-6 4/28/00 14 75 feet 7 56 feet +717 East/Northeast MW-6 9/20/00 14 75 feet 8 99 feet +576 Northeast 1 MW-6 12/2 7100 14 75 feet 9 81 feet +494 North MW-6 7/30101 14 75 feet 9 20 feet +555 East/Northeast MW-6 11/5101 14 75 feet 10 15 feet +460 East MW-6 2/27/02 14 75 reel 8 73 feet +602 East 1 MW-6 5121/02 14 75 feet 9 01 feet +574 East MW-6 8/29/02 14 75 feet 9 27 feet +548 East MWS 12/10/02 1. 14 75 feet 10 11 feet +464 East 4.0 FINDINGS 1 The results of the groundwater sampling indicate the following • The groundwater gradient Is consistent with past monitoring events The gradient Indicates a eastern gradient direction with a slope of approximately 0 00006 1 Inches per foot Groundwater has dropped eight to ten inches since the last monitoring event • Four sampl Irg events have been performed on the newly installed wel Is, MWO- 1, MWO-2,MWO-3 and MWO-1 X Shallow borings MWO-1 and MWO-3 were l non detect for MTBE and MWO-2 had a detection of 11 ppb Indicating some Avalon Environmental Consultants Project# 9627-001-13 Joes Truck Plaza 15600 South Harlan Road January 21,2003 7 Lathrop, California I