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Derek Slack and Neil Thomson o son <br /> June 24, 2020 <br /> Page 3 <br /> The locations of these six monitoring wells are shown on Figure 1, attached. Water levels were <br /> collected approximately weekly from each of the six wells since April 2020. The water surface <br /> elevation in the ponded portion of Sandy Acres was collected concurrently with well levels. Water <br /> level data for April 8 through June 11,2020 are illustrated graphically below. <br /> SANDY ACRES MONITORING WELLS 2020 <br /> �.Ponded water in former pit --►—Well#1 s—Well#5 Well#6 <br /> 5020 <br /> 018 <br /> 5016 <br /> ----------------------------- -- -------------- <br /> :9 5014tt <br /> -« <br /> r <br /> z <br /> a 5012 <br /> a 5010 <br /> s <br /> c <br /> 5008 <br /> 5006 <br /> 5004 <br /> Note:Some pond water <br /> elevations are interpolated <br /> or otherwise estimated. <br /> 5002 <br /> O O O O O O O O O O O O O O O O O O O O O O <br /> 01" 01' Oti Off' 01" O~ 01' Off' 01" 01' 01" 01" Off" Off" Off" 01' Off' 01" Off' Oti Off' 01' <br /> The water level data illustrated in the above chart reflect a local ground water gradient from the <br /> south/southeast (Well No. 3) toward the north/northwest (Well No. 6) across the Sandy Acres <br /> property. However, the relatively consistent surface water level at Sandy Acres compared with <br /> nearby ground water levels over the period of record suggests the ponded water may not be a <br /> simple expression of the local ground water table. Additional evaluation is needed to identify the <br /> amounts and vectors by which water is entering the former pit, and additional data are needed to <br /> support such evaluations. <br /> Recommended Next Steps <br /> In line with E-470's desire to address the issue of ponding water at Sandy Acres, BBA provides <br /> the following recommendations: <br /> 1. Continue regular collection of water level data from the Sandy Acres monitoring wells and <br /> ponded area (to the extent it persists) until at least one year of data have been collected, <br /> through April 2021. <br />