Laserfiche WebLink
Soil Suitability/Nitrate Loading Study Irerracon <br /> Shipherd Property Ripon, California <br /> August 25, 2020 Terracon Project No. NA207060 <br /> 1.5.1 Soil Boring Locations <br /> Based on a review of the site plan, the proposed leach field may be located north of the proposed <br /> modular home. Two percolation test borings B1 and B2 were advanced in the vicinity of the <br /> proposed leach fields. A soil profile (B3) was advanced near boring B1. Refer to Appendix A, <br /> Exhibit 2 for the approximate boring locations. Refer to Table 5 below for boring GPS coordinates. <br /> 1.5.2 Soil Boring Dimensions <br /> Soil borings were advanced with a 4-inch diameter hand auger. Boring B1 and B2 were advanced <br /> to 3.5 feet bgs and boring B3 was advanced 5.2 feet bgs. <br /> 1.5.3 Soil Lithology Observed <br /> The following table presents a log of the soil boring(s). <br /> Table 5. <br /> Summary of Soil Lithology <br /> Boring Depth Interval Soil Type Unified Soil Latitude Longitude <br /> (ft) Classification <br /> 61 0-3.5 Silty Sand SM 37.74754 -121.10722 <br /> B2 0-3.5 Silty Sand SM 37.74785 -121.10721 <br /> B3 0-5.2 Silty Sand SM 37.74756 -121.10724 <br /> Terracon attempted to hand auger a ten foot soil profile; however, soils continued to drop out of <br /> the auger before being pulled up to the surface; therefore, Terracon terminated the boring at 5.2 <br /> feet bgs. <br /> 1.5.4 Discussion of Soil Lithology <br /> The soils encountered in our percolation test boring and soil profile consisted primarily of silty <br /> sands. Generally speaking, coarse-grained soil has a greater potential for percolation than fine- <br /> grained or cemented soil. <br /> Terracon searched the DWR online Well Completion Records for additional information regarding <br /> soil lithology near the site. A well completion report was not available for the site address. One <br /> well record was available for the adjacent eastern address 16401 Milgeo was identified; however, <br /> a copy of the record was not available. The well was reported as 250 feet deep and static water <br /> level was reported at 51 feet bgs. <br /> The DWR website, identified a boring log prepared by Advanced GeoEnviron mental, Inc. dated <br /> 2002. The boring was located at 850 Milgeo Road, approximately 2,000 feet west of the site. <br /> Responsive ■ Resourceful ■ Reliable 9 <br />