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Mr. Alan Buehler, P.G., RWQCB May 16, 2017 Work Plan for Additional Site Investigation Project No. 2092-2057-01 2057 South El Dorado Street, Stockton, CA Page 6 stored in an ice-chilled cooler. Strict chain-of-custody procedures will be followed from the time the samples are collected until the time the samples are relinquished to the laboratory. Task 2C: Waste Management Soil and wastewater generated during the activities will be placed in DOT approved 55-gallon drums and temporarily stored onsite. A composite sample will be collected from the soil cuttings and will be analyzed to determine an appropriate disposal method. A licensed contractor will dispose of the soil and wastewater at an appropriate facility. Task 3: Laboratory Analysis Soil and groundwater samples will be forwarded to a state-certified laboratory for chemical analysis. The samples will be analyzed for GRO using USEPA Method 8015/8260, and for BTEX, 1,2-DCA, MTBE, TBA, DIPE, TAME, and ethyl tertiary butyl ether (ETBE) using USEPA Method 8260. Soil samples will be additionally analyzed for DRO and motor oil range organics (MRO) using USEPA Method 8015, volatile range organic compounds (VOCs, including naphthalene) using USEPA Method 8260, semi-volatile organic compounds and polynuclear aromatic hydrocarbons (PAHs) using USEPA Method 8270, for title 22 metals using USEPA Methods 6020/200.8, for total organic carbon (TOC) using USEPA Method 9060, and for fraction of organic carbon (FOC) using American Society of Testing and Materials (ASTM) Method 2974. Task 4: Site Assessment Report Following completion of the field activities, a report will be prepared, documenting the implemented work. The report will include, at a minimum, a scaled site plan, tabulated soil and groundwater analytical results, certified analytical reports, CPT logs and related information, confirmation of Geotracker data uploads, and an in-depth evaluation of the data and a discussion of findings. LIMITATIONS This document was prepared in general accordance with accepted standards of care that existed at the time this work was performed. No other warranty, expressed or implied, is made. Conclusions and recommendations are based on field observations and data obtained from this work and previous investigations. It should be recognized that definition and evaluation of geologic conditions is a difficult and somewhat inexact science. Judgments leading to conclusions and recommendations are generally made with an incomplete knowledge of the subsurface conditions present. More extensive studies may be performed to reduce uncertainties. This document is solely for the use and information of our client unless otherwise noted. K:\Quick N Save #2 \Work Plans\Q-N-S#2 work plan 2017.doc STRATUS