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Soil Suitability / Nitrate Loading Study Irerracon , Jeremy Winery :-. Lodi, CA May 7, 2019 Terracon Project No. NA197008 Boring Depth Interval Soil Type Unified Soil (feet) Classification Silt with sand, trace gravel, fine 1.0 grained, yellowish brown, stiff to ML very stiff Silt with sand, fine grained, 5.0 ML brown, stiff to very stiff B3 10.0 Silt with sand, fine grained, ML brown, stiff to hard Sandy silt, trace clay, fine 15.0 ML grained, brown, stiff to hard Silty sand with trace gravel, fine 20.0 to medium grained, brown, very SM dense 25.0 Silty sand, fine to medium SM grained, brown, very dense 1.5.4 Discussion of Soil Lithology The soils encountered in our percolation test borings (131, B2, and 133) were generally fine to medium grained sandy silt to silty sand soils. Based on a review of the Geotechnical Engineering Report dated April 26, 2019 (Terracon Project No. NA195021), the soils encountered on the site consisted of medium stiff to hard silt with various amounts of sand, loose to very dense sand with various amounts of silt, and very stiff to hard lean clay with various amounts of sand and silt. Generally speaking, coarse-grained soil has a greater potential for percolation than fine-grained or cemented soil. Terracon searched the DWR online Well Completion Records for additional information regarding soil lithology within 0.5 miles of the site. The following water supply well was identified nearest the site. Table 6. Well Completion Reports. WCR Number Latitude Longitude Depth Approximate Feet Distance/Direction from Site WCR1776-012306 38.179722 -121.169167 322 160 feet/ North Based on a review of the Well Completion records, the soils within the vadose zone (between 0 to 90 feet bgs) are anticipated to consist of clay, gravel, and/or sand strata. Refer to Appendix G for a copy of the Well Completion record. Responsive ■ Resourceful ■ Reliable 10