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Soil Suitability I Nitrate Loading Study Irerracon Vacant Commercial Property m Stockton, California December 7, 2018 in Terracon Project No. NA187056 SOIL SUITABILITY/NITRATE LOADING STUDY VACANT COMMERCIAL PROPERTY, APN 085-310-10 8200 HIGHWAY 99 E. FRONTAGE ROAD STOCKTON, SAN JOAQUIN COUNTY, CALIFORNIA OUR PROJECT NUMBER: NA187056 Our office was contracted by Mr. Ngoc Le to conduct a Soil Suitability/Nitrate Loading Study (SSNLS) for the site located at 8200 Highway 99 E. Frontage Road, Stockton, San Joaquin County, California, Assessor Parcel Number (APN) 085-310-10. This report has been prepared to meet the requirements of the San Joaquin County Development Title Chapter 9-1105, Section 9-1105.2, as follows: The suitability of an area proposed for septic tank usage shall be determined prior to submission of a General Plan Amendment or Zone Reclassification application, the approval of a parcel or final map, or the issuance of a building permit for other development project applications. The suitability shall be determined by the Environmental Health Division in accordance with the following criteria: (1) The intensity and extent of the existing and the proposed development project's use of septic tanks within and around the area; (2) The suitability of the soil for utilizing septic systems, including percolation rates and soil profiles; (3) The depth and gradient of the water table,- (4) able;(4) The history of past uses in the project area to assess potential problems; (5) Other information as required by the Environmental Health Division to determine the cumulative effect of the existing and the proposed development project on groundwater contamination; and (6) In non-agricultural zones, septic systems will only be considered for parcels two (2) acres or more in size, except in areas zoned Rural Residential, where parcels one (1)acre or more in size will be considered if served by a public water system and public storm drainage system. Other requirements of this Chapter must still be met. The purpose of the SSNLS is to identify, to the extent feasible and based on the search methods described in the text, the history of past uses in the project area to assess potential problems in connection with the site. The report also provides recommendations intended to inform the client and allow the EHD to make an informed decision on whether further action should be required to address any potential contamination sources identified. This report contains information and data provided to Terracon by several sources. Terracon in no way warrants the accuracy or completeness of the information provided to this investigation by those sources. Responsive ■ Resourceful ■ Reliable 3