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Appendix C-Historical Water Quality City of Lathrop <br /> Consolidated Treatment Facility <br /> Monitoring and Reporting Program 115-2016-0028-03 Rev3 <br /> Soil Sampling Results <br /> Well Location Depth Sample Date Texture' PH EC Ca Mg Na K SO, Cl NO,-NIN <br /> COa CO, MSa <br /> Interval dS/m WI mg/I Wl mg/I mg/I mgA mg/L mg/I mgA mg/I <br /> 2-3 silty sand 7.9 2.75 224 69.3 267 12 312 500 68.6130 <1.0 1,51J <br /> 3-4 clayeysandy silt 8.0 2.67 210 70.5 285 16 360 610 18.8160 <1.0 1,649 <br /> KMW-30 4-5 12/11/2015 clayeysilt 8.0 2.54 186 63.2 280 7.8 351 532 15.1110 <1.0 1,490 <br /> 5-6 silty clay 8.3 3.99 222 89.9 386 3.9 639 J20 17.7120 <1.0 2,138 <br /> 6-7 silty clay 8.4 4.1 218 98.4 451 <3.9 932 5J3 18.9120 <1.0 2,348 <br /> 2-3 silty sand ].] at 689 216 602 16 4]5 1]]3 173110 <1.0 3,999 <br /> 3-4 clayey sa ndy silt J.] 6.3 489 169 566 23 42] 1124 194156 <1.0 3,069 <br /> 34 clayeysandysilt J.6 6 415 141 485 23 384 993 186180 <1.0 2,]16KMW-11 du licafe 12/11/20154-5 silty clay 8.2 5.35 269 101 655 3.9 384 1102 97.2150 <1.0 2,6865-6 clayysilt 8.3 4.48 184 J2.9 605 3.9 3]5 95J 4].4160 <I.0 2,3246] clayysilt 8.1 5.42 222 107 ]OS 3.9 552 1241 33.4120 <I.0 2,920 <br /> Notes: <br /> a.Texture classified based on feel as described in the Unified Soil Classification System(USCS) <br /> b.TDS is calculated as the sum of the ions <br /> Soil samples were taken adjacent to well sites KMW-10 and KMW-11. <br /> The well sites are on a berm,approximately 2 feet higher than the adjacent land s,rfi-of-AS-2.Therefore,personnel augured down 2 feet and <br /> then began collecting soil samples in one-foot increments down to a total of J feet below land surface. <br /> Monitoring We11 Abandonment and Installation Report-City&Lathrop Crossroads Wastewater Treatment Facility,Land Application Sites 1 and 2. <br /> Prepared by HydmFocus,Inc. <br /> EKI Environment&Water,Inc. <br /> July 2023 Page 174 of 281 EKI 890088.03 <br />