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Sampling and Analysis Plan for Phase II Environmental Site Assessment 125 North Stockton Street, Lodi,CA 95240 • Stantec's Phase I ESA report found that although the current Property building was constructed in the 1980s or 1990s,it is possible that demolition of historical Property buildings may have resulted in deposition of asbestos or lead-based paint into shallow soil. • Although precise site redevelopment plans have not been finalized, shallow soils at the Property would likely be disturbed during the redevelopment process. Similarly, the potential presence of VOCs in groundwater beneath the Site may result in chemical exposure for future occupants via the vapor intrusion pathway.Therefore, shallow soil and soil vapor conditions should be evaluated to assist with redevelopment planning. 2.1 9 Potentially Complete Exposure Pathways Based on the current and anticipated future use of the Property, the following exposure pathways are considered potentially complete or likely to be complete at the Property in the future: 1. Direct contact with soil within 10 feet of the ground surface (construction and excavation worker receptors); and, 2. Inhalation of indoor and outdoor vapors from volatile contaminants in soil (commercial or residential receptors). Analytical data gathered during the Phase II ESA will be evaluated against applicable DTSC and/or USEPA screening criteria for these potentially complete exposure pathways to assess potential risks to human health. 2.2 Data Quality Objectives Analysis This section details the seven-step process used to define data quality objectives. 2.2.1 Step 1 - Problem Statement The Site (located at 125 North Stockton Street, Lodi, California) is comprised of the eastern portion of APN 043-084-130, totaling approximately 0.78 acres. Historical uses of the Property include a concrete block manufacturing company, office buildings, truck storage area, and timber planing mill. Lodi Gas Works, an MGP, was present on the western portion of the Property and extending offsite to the west. Assessment of environmental conditions is required to support planned redevelopment of the Site by the City of Lodi. 2.2.2 Step 2 - Study Goals The goals for the study are to: (1) assess shallow soil and soil vapor conditions relative to historical sources of contamination: (2) compare soil and soil vapor data to risk-based screening levels to inform soil handling protocols during redevelopment and potential human health exposure threats for future occupants; and (3) assess the northwestern portion of the Property using geophysical methods to evaluate the potential presence of an historical UST. Stantec 6