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As required by the laboratory, the sample was collected in a plastic container and three <br /> glass vials for nitrate and DBCP analysis, respectively. The sample was placed on ice <br /> and transported under chain of custody to FGL Environmental, Stockton. <br /> Nitrate was detected in the water sample at a concentration of 18.8 mg/L-N, significantly <br /> over the MCL of 10 mg/L-N. DBCP was detected in the sample at a concentration of <br /> 0.09 µg/L, under the MCL of 0.2 µg/L but over the MCLG of zero. The laboratory <br /> analytical results are attached as Appendix 5 of this report. <br /> Soil Profile and Geologic Information <br /> The Site is depicted on the Geologic and geophysical maps of the Stockton 30' x 60' <br /> quadrangle, California (Delattre, et al., 2023) as within a map unit of the Modesto <br /> Formation upper member, described as undivided alluvium (Plate 11). <br /> The surface and near surface soils located at the Site are reported by the USDA Web <br /> Soil Survey to be composed of Chuloak coarse sandy loam (USDA, 2026) (Plate 12). <br /> The table below presents some selected properties of this soil type: <br /> Table 1. Selected Properties of On-Site Soils (USDA, 1992) <br /> Soil Name Depth Unified Soil Salinity Soil Perme- Septic tank <br /> and Map Reaction ability absorption <br /> Symbol (in) Classification mmhos/cm pH (in/hr) fields <br /> Chuloak 0-19 Coarse sandy loam, SM <2 5.6-6.5 2.0-6.0 Severe: <br /> coarse 19-44 Sandy clay loam, sandy <2 6.1 -7.3 0.2-0.6 peres slowly <br /> sandy loam, loam, SC-SM, SC <br /> 0-2% 44-55 Fine sandy loam, SM <2 6.6-7.3 2.0 -6.0 <br /> slopes, 127 55-64 Loamy coarse sand, SM <2 6.6-7.3 6.0-20 <br /> Note:The table descriptions do not necessarily reflect site-specific soil properties. See description of the map unit for <br /> composition and behavior characteristics of the map unit. <br /> Soil Borings <br /> On April 12, 2026, Live Oak excavated a shallow soil boring on the Site for the purpose <br /> of percolation testing. The boring was four inches in diameter, 2.23 feet deep, and was <br /> excavated by hand auger. The location of the boring is indicated on Plate 13. <br /> The soil in the boring was similar to that described by the Soil Survey. Silty, fine to <br /> coarse sand was encountered to the full depth of the hole. The soil log is presented on <br /> Plate 14. <br /> LOGE 2619 Page 5 <br />