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Sampling and Analysis Plan for <br /> Phase II Environmental Site Assessment <br /> South Pointe Property: 701, 705, 833, 855 West Weber Avenue <br /> Stockton, California <br /> Background <br /> May 17, 2021 <br /> Analytical Parameter Laboratory <br /> (Contaminants of Analytical Results Regulatory Limit(specify) <br /> Concern) (units) <br /> Molybdenum 5.4 mg/kg 390 mg/kg (Residential RSL) <br /> Nickel 110 mg/kg 820 mg/kg (Residential SL) <br /> Vanadium 81 mg/kg 390 mg/kg (Residential RSL) <br /> Zinc 1,500 mg/kg 23,000 mg/kg (Residential RSL) <br /> Notes: <br /> All sampling conducted February—August 2007,by Wallace-Kuhl&Associates, Inc. <br /> Only analytes detected in one or more sample are presented. <br /> 1 —Naturally occurring arsenic frequently exceeds risk-based screening criteria,therefore arsenic concentrations should <br /> be evaluated relative to background conditions,such as the upper-bound range of 11 mg/kg for California soils <br /> established by Kearney Foundation of Soil Science(Kearney, 1996). <br /> Residential SLs—California Department of Toxic Substances Control(DTSC)Screening Levels,residential site use <br /> scenario(DTSC HERO Note 3,June 2020). <br /> Residential RSLs—USEPA Regional Screening Levels, residential site use scenario(USEPA RSLs, <br /> November 2020). <br /> Residential ESLs—San Francisco Bay Regional Water Quality Control Board(RWQCB)Environmental <br /> Screening Levels, residential site use scenario(2019). <br /> 2.4 SCOPING MEETING <br /> A formal scoping meeting was not held. The grantee and property owner(City of Stockton) has requested <br /> completion of a supplemental Phase II ESA of the South Pointe property(the site) as they are marketing <br /> the site for redevelopment and have attracted the interest of developers. <br /> 2.5 GEOLOGICAL/METEOROLOGICAL INFORMATION <br /> The site is located within the Great Valley geomorphic province, a large, elongate, northwest-trending <br /> structural trough bounded to the west by the Coast Ranges and to the east by the Sierra Nevada. The <br /> Great Valley consists of two long north-south trending valleys connected end-to-end, with the Sacramento <br /> Valley to the north and the San Joaquin Valley to the south. The site is located in the northern portion of <br /> the San Joaquin Valley. <br /> The Sacramento and San Joaquin Valleys have been filled with thick sequences of sediment derived from <br /> marine and continental sources. Sedimentary deposits are relatively thin at the valley edges and thicken <br /> to more than 25,000 feet in the deepest interior areas. In general, older formations are marine in origin, <br /> and younger formations are derived from continental sediments. Younger sediments are being continually <br /> eroded primarily from the Sierra Nevada and transported to the valleys by downslope fluvial systems. <br /> A U.S. Department of Agriculture, Soil Conservation Service Soil Survey Report of San Joaquin County <br /> dated July 1980 classifies near-surface soils at the site as `Urban Land', which includes areas that have <br /> MProject No.: 185704833.5.3&5.4 2.6 <br />