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Site Investigation Work Plan Raymond Investment Corporation ' Former Helena Chemical Facility Page 3 Condor contacted Brian Martasin of Andersen Environmental,the firm that prepared the 2013 Phase I and ' Phase II ESAs. He provided a map of the sampling August 2013 sampling locations. Condor contacted the agent, Mason Ross, of Pacific Coast Capital Partners, the owner of the adjacent ' property to the north. He indicated that they would not permit site access for the purposes of an environmental investigation. ' Condor's proposed soil and groundwater investigation will include additional soil and groundwater sampling, then the installation, development, and survey of three groundwater monitoring wells at the Site. The work to be completed by Condor will consist of the following tasks: ' 3.0 SITE PREPARATION Condor will obtain an encroachment permit from the City of Stockton to drill and sample at four (4) locations within the northbound lanes of Tillie Lewis Drive. Drilling in the traffic lanes of Tillie Lewis Drive is necessary because utilities are located in the adjacent shoulder of the road. Condor will obtain a soil boring permit from SJCEHD prior to scheduling field activities with the sub-contractors and ' notifying Underground Services Alert. Condor will obtain a monitoring well installation permit from SJCEHD prior to scheduling field activities with the sub-contractors. Different drilling sub-contractors and permits will be used for the soil borings and well installations to utilize specialized equipment for each task. Prior to initiating fieldwork at the Site, all field personnel will familiarize themselves with the tSite-Specific Health and Safety Plan (HASP). In addition, a tailgate safety meeting will be held prior to commencement of fieldwork. The HASP pertains to field activities and includes information on potential hazards expected to be encountered at the Site, personal protective equipment, and directions to and ' telephone numbers for the nearest hospital. A copy of the HASP is included in Appendix B. 4.0 SOIL AND GROUNDWATER SAMPLING FIELDWORK Condor will obtain the services of an underground utility locating sub-contractor to supplement the locations provided by public utilities during the USA process. The lessees or the client will accept the boring locations and confirm the location of underground utilities. Condor proposes drilling and collecting soil samples from fourteen (14) locations and groundwater samples from eight (8) locations, and the installation of three(3) monitoring wells, completed as a second phase after the results of the first phase of drilling and sampling have been evaluated. Soil samples will be collected for the purpose of characterizing the lithology of the subsurface soils and for laboratory analysis to define the lateral and vertical extent of soil impacted by nitrates. Soil samples will be collected using Geoproble or similar direct push equipment that has been successful at this site in the past. A dual tube system will be used for ' soil samples. A hydropunch system will be used for groundwater samples. Groundwater samples will be collected from eight borings at eleven to fifteen feet below the surface, or where practical based on field conditions. Depth to water and permeability vary significantly, as indicated by the 2013 Phase II sampling ' results, Table A, Appendix B. Boring B41 will be advanced to a depth of approximately thirty-five feet, then both a soil and groundwater sample will be collected to provide vertical definition below the area where previous investigations have indicated that soil has been impacted by nitrates. Samples were ' collected at the surface and depths of one, three, and five feet below the surface during previous investigations, Table D, Appendix B. Condor proposes to collect samples at depths of two, five, and twelve feet below the surface during this investigation, except at B41. A total of forty-two (42) soil samples and eight(8)groundwater samples will be collected from the fourteen(14)borings and submitted to a California certified laboratory for analyses. The approximate boring locations are shown on Figure 2 —Site Map with Proposed Boring Locations,Appendix A. i«1 CONDOR