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Work plan for Addition/Groundwater Assessment <br /> Former Chevron`Service Station 94054 <br /> March 19, 2010 <br /> 3.0 PROPOSED SCOPE OF"WORK <br /> ARCADIS will supervise the advancement of two B zone soil borings, one east of groundwater <br /> monitoring well MW-12 and one east of groundwater monitoring well MW-10 at the locations <br /> shown on Figure 2. The soil borings will be completed as groundwater monitoring wells to <br /> evaluate the downgradient extent of petroleum hydrocarbon impacts to soil and groundwater <br /> within the B zone. The proposed B zone monitoring wells will be double cased to minimize the <br /> potential for cross contamination between the A zone and B zone. <br /> 3.1 SITE SPECIFIC E-HASP <br /> As required by the Occupational Health and Safety Administration (OSHA) "Hazardous Waste <br /> Operations and Emergency Response" guidelines (29 Code of Federal Regulations Section <br /> 1910.120), and by California Occupational Health and Safety Administration (Cal-OSHA) <br /> "Hazardous Waste Operations and Emergency Response" guidelines (California Code of <br /> Regulations Title 8, Section 5192), ARCADIS will prepare a site specific environmental health <br /> and safety plan (E-HASP) prior to commencement of field work. The field staff and contractors <br /> will review the E-HASP prior to beginning field operations at the site. <br /> 3.2 PERMITTING <br /> All applicable permits will be obtained from SJCEHD and the City of Stockton as necessary, <br /> prior to commencing field activities. <br /> 3.3 UNDERGROUND UTILITY LOCATING <br /> Underground Service Alert (USA) will be notified a minimum of 48 hours prior to commencing <br /> field activities to identify any public utility alignments that may be in conflict with the proposed <br /> borings. In conjunction with the USA, a private utility locating company will be utilized to further <br /> evaluate the boring locations relative to underground utilities. Locations may require field <br /> modifications due to offsite utility locations and/or field conditions. <br /> 3.4 QUALITY ASSURANCE/QUALITY CONTROL PLAN <br /> Quality assurance/quality control (QA/QC) samples will be submitted for laboratory analysis. A <br /> laboratory supplied trip blank will accompany each groundwater sample delivery group. Trip <br /> blank samples will be analyzed for total petroleum hydrocarbons in the gasoline range <br /> (TPH-GRO), benzene, toluene, ethylbenzene and total xylenes (BTEX) and methyl tertiary butyl <br /> ether (MTBE). For every twenty soil samples obtained, a duplicate soil sample will be collected <br /> and analyzed for the same constituents as described in Section 3.5.1. <br /> �\CASFP\Data'Aproject\ENV\CHEVRCN\94054\6 Delwerables\Work Plans\2010\Temp\W0rk Plan for Site Assessment_4821010950.doc 3 <br />