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McBillin Real Estate Investment - 2- 19 January 2022 <br /> Table 2—Summary of Proposed DPE Wells <br /> Depth of <br /> rn highest <br /> E Proposed <br /> Proposed 3 a) Screened Casing Recent Soil historical <br /> U aD a Extraction <br /> DPE Well X Z m Interval Dia. DTWI Samplingz petroleum <br /> w CL m Method soil <br /> of impact <br /> (ft bgs) (in) (ft bTOC) (ft bgs) <br /> VW-1A X 10-25 4 Depth: <br /> VW-2A X 10-25 4 Minimum: 5ft intervals <br /> VW-3^ X 10-25 4 16.63 <br /> VW-4 X 10-25 4 Analysis: <br /> VW-5 X 10-25 4 Downhole Maximum: TPHg, 5-30 <br /> VW-6 X 10-25 4 Stinger' 23.40 TPHd, <br /> MW-3B X 10-45 4 MTBE, TBA, <br /> MW-4B X 10-45 4 Average: DIPE, ETBE, <br /> MW-5B X 10-45 4 19.64 TAME <br /> MW-6B.c X 10-45 4 <br /> DTW= depth to water; ft= feet; bgs= below ground surface; bTOC= below top of casing <br /> A= RAP text does not specify these wells will be utilized as DPE wells, but Figure 3 shows <br /> radius of influence notations around each of them. <br /> B= Replacement wells will have new DPE well IDs once they have been installed <br /> C= RAP text indicates this replacement well will be utilized as a DPE well, but Figure 3 does not <br /> show a radius of influence notation around it. <br /> 1= Data from 5 most recent sampling events: 4Q18, 4Q19, 2Q20, 4Q20, 2Q21 <br /> 2= Soil sampling to be performed only in new and replacement well boreholes <br /> 3= Combined vapor & water extraction stream <br /> Table 3—Summary of Proposed Operation & Maintenance (O&M) <br /> O&M Sampling <br /> Frequency Frequency Sampling Points <br /> Bi-weekly Monthly Vapor & Water Influent & Effluent <br /> (per permit requirements) <br /> Table 4 — Summary of Proposed Remedial Groundwater Monitoring <br /> None specified. <br /> With the conversion of MW-3 through MW-6 to DPE wells, no dedicat <br /> monitoring wells will remain on-Site except deep well MW-1 and cross <br /> gradient well MW-2. <br />