SR0083704_SSNL - Laserfiche WebLink

Home Browse Search

Soil Suitability and Nitrate Loading Study MCDONALDISLAND STATION 2121 Zuckerman Road, Stockton, California 95202 1.0. INTRODUCTION AND PROPOSED DEVELOPMENT AdvancedGeo, Inc. (AGI) has prepared this Soil Suitability and Nitrate Loading Study (Study) for the property located at 2121 Zuckerman Road, Stockton, California (site or subject property). The purpose of this Study is to determine the potential impact from nitrate loading and the suitability of the subsurface for an onsite wastewater treatment system (OWTS) due to the proposed development of a commercial office building and septic system in the project study area, and the future use of the property. The study was performed in accordance with the requirements of Section 9-1105.2(d) of the San Joaquin County Community Development Department (SJCCDD). The scope of work included a soil percolation test, review of published soil and groundwater information, local septic use and permit research and estimated nitrate impact to soil and groundwater at the site. The site and surrounding area are illustrated in Figure 1. A site vicinity map illustrating the subject property parcel, project location and project study area is presented in Figure 2. An overall site plan depicting the project location and structures, wells, and development at the subject property parcel is presented in Figure 3; a topographic survey site plan is presented in Figure 4; a detailed site plan of the proposed development in the project area is presented in Figure 5; and the project utility plan depicting the proposed septic system and percolation test hole locations are illustrated in Figure 6. 1.1. DESCRIPTION OF SITE The location of the site, surrounding properties and general setting is illustrated on the Holt, CA topographic map (7.5 Minute United States Geological Survey (USGS) Topographic Series, California). The subject property parcel is located in Sections 24 and 25 of Township 2 North, Range 4 East, and Sections 19 and 30 of Township 2 North, Range 5 East, Mount Diablo Base and Meridian. The project and study area is located in Section 25, Township 2 North, Range 4 East, Mount Diablo Base and Meridian (Figure 1; Appendix A). The topographic map shows the site parcel located at an elevation of approximately 10 to 15 feet above mean sea level in an area of low topographic relief. The site parcel is located in the southeastern portion of McDonald Island on the east side of Zuckerman Road. The project location and project study area is part of a 565-acre parcel identified as San Joaquin County Assessor Parcel Number (APN) 129-080-090. The project study area is located in the northwestern portion of the parcel. The parcel is occupied by two (2) PG&E gas storage facilities, Whiskey Slough Station and Turner Cut Station. The Whiskey Slough Station is approximately 1,600 feet east of the project study area, and Turner Cut Station is approximately 3,500 feet south of the project site. The current land