SU0009799 SSNL - Laserfiche WebLink

Home Browse Search

' 05 November 2014 AGE Project No. 14-3119 ' Page 10 of 17 ' 7.1. CHEMICAL AND PHYSICAL PROPERTIES OF SITE SOILS The local soil describes the dominant soil composition in the general area of the subject ' property based on information from the U. S. Department of Agriculture's Soil Conservation Service State Soil Geographic Database soil maps. The United States Department of Agriculture Soil Survey of San Joaquin County, California indicates the soil type for the subject property as caypay clay, 0 to 2 percent slopes (#107). The caypay clay has been denoted as shallow to 60 inches deep, percolates slowly. Permeability is slow in caypay clay and the soil has a high shrink-swell potential. t Caypay clay soil typically has the same chemical properties between 0-60 inches bsg. The pH level ranges between 6.6 - 7.3 units with a salinity of less than 2.0. 7.2. MASS TRANSPORT PROPERTIES OF UNDERLYING SITE SOILS ' This shallow well-drained rich soil has a high available water-holding capacity. Additionally, three feet deep septic leach pits have been installed at the ends of the septic leach filed lines. The natural fertility of this soil lends it very well to sustainable ' farming practices. Permeability is slow, available water capacity is high and the shrink- swell potential is high. Septic leech fields should have an increased absorption field to overcome the slow permeability. 8.0. GROUNDWATER ANALYSIS ' The subject property water supply well was sampled for nitrate analysis. The well is ' located on the central eastern portion of the parcel and access was granted by the property owner for sampling. ' 8.1. DESCRIPTION OF LOCAL GROUND WATER ' The San Joaquin County Flood Control and Water Conservation District's Lines of Equal Depth to Ground Water Fall 2012 indicates the depth to ground water is 5 to 10 feet. Ground water is appears to flow to the northeast in the direction of the Old River. ' AGE performed a ground water query on the California Department of Water Resources (CDWR) Internet site, http://well.water.ca.gov. Based on the CDWR the current depth to ground water surrounding the subject property was 5 feet to 10 feet bsg. ' Based upon a record review conducted at EHD by an AGE representative depth to water was indicated on well permits for the surrounding area to be between 5-feet and ' 10-feet bsg. The wells on the adjacent properties were sealed to a depth of 50 feet at 11051 and 11157 East Larch Road. Advanced GeoGnvironmental,Inc. 1