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Figure 4 <br />Hydrogeologic Cross-Sec�on B-B’ and <br />COC Ver�cal Isoconcentra�on Profile <br />Groundwater Well Installa�on Work Plan Sharpe Army Depot, Lathrop, California <br />Lithologic Units <br />CL, CL-ML, CH: <br />clay, silty clay, sandy clay <br />SM, SC, ML: silty sand, clayey sand, <br />silty, sandy, clayey silt <br />SP, SW, GM, GW: sand, well-graded sand, <br />silty gravel, well-graded gravel <br />Legend <br />* <br />** <br />Screened Interval- 3Q19 Groundwater Eleva�on (� msl)- 2019 CCI4 concentra�on (μg/L)- 2019 TCE concentra�on (μg/L)-2019 PCE concentra�on (μg/L) <br />Approximate A Zone Groundwater Eleva�on, 3Q19 <br />Opera�ng Extrac�on Well <br />Well Decommissioned (June 2001) <br />5.2214.06.15.5 <br />NS <br />ND <br />J <br />Not Measured <br />Not Sampled <br />Not Detected <br />Analyte was present, but reported value is es�mated <br />2018 Es�mated TCE Isoconcentra�on (μg/L) <br />2019 Es�mated TCE Isoconcentra�on (μg/L) <br />NM <br />20 — <br />0 — <br />-20 — <br />-40 — <br />-60 — <br />-80 — <br />-100 — <br />-120 — <br />-140 — <br />-160 — <br />-180 — <br />-200 — <br />-220 — <br />-240 — <br />-260 — <br />— 20 <br />— 0 <br />— -20 <br />— -40 <br />— -60 <br />— -80 <br />— -100 <br />— -120 <br />— -140 <br />— -160 <br />— -180 <br />— -200 <br />— -220 <br />— -240 <br />— -260 <br />3500300025002000150010005000 <br />Distance (feet) <br />4000 4500Eleva�on (feet mean sea level)NorthwestB SoutheastB'A ZONEB ZONEC ZONECD TRANSITIOND ZONESharpe Army Depot Boundary <br />KMnO4 InSitu Treatment Area Site P-4A <br />MW509A/B/C/CD**MW510A/B/CMW537B/C/CDMW507A/B/CMW532A/B/C/CDMW301A/AB/B/ BC1/BC2/CMW437A/B/C/DMW446A/B/CMW443A/B/CMW457A/BEWCB2*MW460AB/CMW453A/BMW325A/B/CEWCAB2*EWCAB1*EWCC1*EWCC3R*P13CP9CCP1392EWCA2*MW543BProposed wells are shown in red. <br />5 <br />5 <br />25 <br />1005 <br />5 <br />100 <br />5 <br />5 <br />5.52NSNSNS <br />9.185.52 <br />5.06NDNDND <br />2.48NDNDND <br />3.98NDNDND <br />4.04NS21.0NS <br />4.28ND95.0ND <br />4.76ND6.6ND <br />4.72ND140.0ND <br />4.84NDNDND <br />5.03ND2.9ND <br />5.61ND0.94 JND <br />7.21NDNDND <br />7.73ND0.42 JND6.39ND1.3ND <br />4.99ND6.3ND <br />4.79ND1.0ND <br />6.91NDNDND <br />4.36ND55.0ND <br />4.1ND21.0ND-21.17ND6.5ND <br />5.58NDNDND <br />7.32ND0.7 JND <br />5.31ND20ND <br />5.23ND1.1ND <br />6.78ND2.1ND <br />7.34NSNSNS <br />6.24ND13.0ND <br />7.72NSNSNS <br />6.76ND1.2ND <br />6.54NSNSNS <br />-14.18ND8.1ND <br />7.82ND2.5ND <br />5.69ND0.85 JND <br />8.76ND3.0ND <br />4.28NSNSNS -44.56ND16.0ND <br />9.18ND1.8ND <br />7.67ND22.0ND <br />7.33ND0.37 JND <br />NMNSNSNS <br />NMNSNSNS <br />NMNSNSNS <br />NMNSNSNS <br />NMNSNSNS <br />NMNSNSNS <br />5.2NDNDND