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Revised Work Plan for Additional Site Investigation Raymond Investment Corporation Former Helena Chemical Facility February 27,2018 Page 5 located 2,500 feet west of the Site. The locations of the three stormwater basins are shown on Figure 4 (Appendix A). 4.3.3 Healthcare Facilities There are no healthcare facilities located within 1,000 feet of the site. 4.3.4 Parks No parks are located within 1,000 feet of the site. 4.4 PUBLIC WATER SUPPLY California Water Service (Cal Water) provides water to the study area and owns the large water tank located approximately 700 feet east-southeast of the Site. Condor contacted Cal Water to identify any of their wells within the 1,000-foot search radius. Craig Stevens, California Water Service Superintendent II, indicated that Cal Water does not have any wells within 1,000 feet of the Site. The pump station located next to the water tank is a booster pump station tied to the distribution system and not the location of a well site. Condor also contacted the City of Stockton to identify whether any City wells were located within the 1,000-foot study area. Eric Houston, Chief Plant Operator for the City of Stockton Municipal Utilities Department, indicated that the City of Stockton does not have any wells within 1,000 feet of the Site. 5.0 PROPOSED SCOPE OF WORK The purpose of the work is to further evaluate the extent of pollutants associated with historical pesticide storage area in the northern portion of the Site, near boring B39/GW12, and to further investigate the lateral extent of dissolved constituents of concern in the southern portion of the Site. All work conducted by Condor will be under the supervision of a California Professional Geologist. 5.1 SITE PREPARATION Condor will obtain the necessary drilling permits from EHD prior to scheduling field activities with the sub-contractors and notifying Underground Services Alert (USA). At least one drilling location is located on the adjacent property to the north, so fieldwork will be coordinated with the adjacent property owner. Condor will mark the drilling locations on the ground with white paint and contact USA at least 48 hours prior initiating drilling, as required by law. 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 tenants, the property owner, and the adjacent property owner will accept the boring locations and confirm the location of underground utilities. Prior to initiating fieldwork at the Site, all field personnel will familiarize themselves with the Site-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 to be used during field activities, and directions to and telephone numbers for the nearest hospital. A copy of the HASP is included in Appendix C. Ca CONDOR