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15999 W CORRAL HOLLOW RD Project No.2019-00027 Pa g e 12 <br /> The elevation at site according to USA Topographic Map2 is approximately 1020 feet above mean sea <br /> level (msl).The site is located in a relatively flat drainage area surrounded by steep ham.Aowever, <br /> regionally the topography across th_e parcel varies greatly. <br /> According to the San Joaquin County District Viewer web site,3 the subject property is zoned P-F, <br /> Public Facilities. This zoning designation is "intended to provide for the establishment of major <br /> correctional,medical,and infrastructure facilities;publicly owned recreation facilities and areas and <br /> similar facilities and areas;educational facilities meeting State requirements for primary,secondary, <br /> and higher education; police and fire protection facilities; and supporting uses in areas where they <br /> are most likely to benefit the County's residents." <br /> Location maps of the subject property are attached to our concurrent SSS report <br /> 1.2 Proposed Development <br /> -The property currently consists of one parcel, 15999 W Corral Hollow Rd.,Tracy CA and is 5753.40 <br /> acres. Proposed"development"consists of a commercial onsite wastewater treatmentsVstem for the <br /> T8021 office located at Site 300 which will accommodate up to 20 maividuals. Lawrence Livermore <br /> -N- -n-aal aaboratories LLNL)—i rrently expanding its workforce and needs additional office space. <br /> The LLNL Site 300 has been selected to loca a modular office building to increase capacity for <br /> mission growth.This is adjacent to a building which is rid longer utilized.The objective of the project <br /> is to procure one modular office building,and improve site utilities such as electrical,communication, <br /> water,sewer,and storm water drainage.Existing asphalt pavement will be removed,and the site will <br /> be regraded to site the modular office.The proposed septic design (as determined by LLNL staff and <br /> SIC-EHD)includes a filter bed configuration with a total leach line length of 450 feet,and an area of <br /> 1,800 square feet.The proposed septic location map is attached to our concurrent SSS report <br /> 2.0 CHEMICAL AND PHYSICAL PROPERTIES OF SOIL <br /> 2.1 Chemical and Physical Soil Properties <br /> The Site is depicted on the Geologic Map of the Midway&Tracy quadrangles,Alameda&San Joaquin <br /> Counties,and falls within the upper portion of the Neroly Formation(Tn).Tn is characterized by non- <br /> marine clastic,thick bedded,medium grained lithified deposits,Miocene in age. <br /> r1the surface and near surface soils located at the Site are reported by the San Joaquin County Soil <br /> ISurvey to be comprised of the Wisflat(35%)-Arburua(30%)-San Timoteo(20%)Complex(Map Unit <br /> 275) with other minor components comprising the remaining 15 percent. The Wisflat soil is <br /> comprised of sandy,sandy-gravelly loam with 30-50%slopes.The Arburua soil is comprised of loam <br /> derived from weathered calcareous sandstone with 30-90% slopes. The San Timoteo soil is <br /> comprised of sandy loam with 30-50%slopes and is derived from weathered calcareous sandstone. <br /> The table below presents some selected properties of the individual soil types: <br /> Z USA Topographic Maps <br /> <https://www.arcgis.com/home/webmap/viewer.html?extent=6201228.15419629,2025585.68749859,6328031.3996 <br /> 8183,2098902.18784695,2227> <br /> 3 San Joaquin County District Viewer, http://simap.org/website/DistrictViewer/Viewer.asp. <br /> Petralogix Engineering,Inc <br /> 26675 Bruelta Road,Galt,Ca 95632 <br /> (209)-000-5729 <br /> www.petralogix.com <br />