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S E C O R <br /> Work Plan for Soil Vapor Survey <br /> August 9, 2007 <br /> ARCO Service Station No. 2186 <br /> Page 4 of 8 <br /> The SVE system was started on August 30, 2004. Startup sampling was conducted the same <br /> day. Influent (02186AINF-083004), midpoint (02186AMID-083004) and effluent (02186AEFF- <br /> 083004) air samples were collected and submitted to STL San Francisco in San Francisco, <br /> California. The midpoint and effluent samples did not contain any reportable concentrations of <br /> GRO, BTEX or MTBE. The flow rate was recorded as 95 standard cf/m The y�stem w ss <br /> shutdown on September 7, 2004 due to noise issues. of, <br /> Groundwater monitoring has been conducted at the site since 1995. Groundwat-er,flowis_to the- <br /> northeast and east. <br /> A summary of well construction details, historic groundwater data, and soil data is included in <br /> Tables 1 through 3. <br /> PROPOSED SCOPE OF WORK <br /> The proposed scope of work for this work plan includes the installation of three permanent soil <br /> vapor probes at the site. Details for the activities associated with completion of the scope of <br /> work are provided below. <br /> Site Health and Safety Plan <br /> As required by the Occupational Health and Safety Administration (OSHA) "Hazardous Waste <br /> Operations and Emergency Response" guidelines (29 CFR 1910.120), and by California <br /> Occupational Health and Safety Administration (Cal-OSHA) "Hazardous Waste Operations and <br /> Emergency Response" guidelines (CCR Title 8, Section 5192), the contractor will prepare a site <br /> specific Health and Safety Plan (HASP). At a minimum, the HASP will define the proposed <br /> subsurface investigation activities, describe physical and chemical hazards that may be <br /> associated with the work, provide a map to the nearest emergency medical facility, and include <br /> material safety data sheets (MSDS) for any hazardous chemicals that will be used or produced <br /> during the work. A copy of the HASP will be available onsite at all times during field work. The <br /> field staff and contractors performing field activities will review the HASP prior to beginning field <br /> operations, as described in this work plan, at the site. <br /> Permitting <br /> The required boring installation permits will be obtained from the SJCEHD prior to beginning <br /> any work. <br /> Preliminary Field Activities <br /> All boring locations will be marked with white paint and Underground Service Alert (USA) will be <br /> notified at least 48 hours in advance of drilling, to allow the local underground utility companies <br /> to identify the location of any utilities in-the area. USA will be notified to identify any public utility <br /> alignments that may be in conflict with the proposed borings. In conjunction with the USA, 811 <br /> will be notified at least 48 hours in advance of drilling, to allow the local underground utility <br /> companies to identify the location of any utilities-in the area. The-new-81-1•number�is-a-natianal <br /> �'Call. Before•You Dig",phonenumber designated•by-the-FCC--to-eliminate---the confusion-of'3 <br /> multiple "Call Before You rDig"-nuf7ibers.=81,•1,_calls will be directed,to the local�One Call-Center <br /> +and the affected-utilities., who-willzthen,mark_underground lines.-., In conjunction with_USA and <br /> 81:1, a private.utility locating company will be utilized<fonclewring�proposed �boringdocationsfor <br /> underground'utilities. <br /> 2186 SVI 8-07.doc SECOR international Incorporated <br /> 1 <br />