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Revised Work Plan for Additional Site Investigation <br />Raymond Investment Corporation <br />Former Helena Chemical Facility <br />. February 27, 2018 <br />Page 4 <br />seven DWR records was for the installation of a groundwater monitoring well associated with the former <br />agricultural chemical distribution facility (Oxychem) located at 1904 West Charter Way. One of the seven <br />DWR records was for the installation of an industrial water supply well associated with the Klein Bros. <br />property located to the north and east of the site. <br />A portion of the Klein Bros. property is within the 1,000-foot study radius; therefore, Condor contacted <br />Klein Bros. to obtain additional information regarding the well on their property. Sherry Rita, Controller <br />for Klein Bros. Holdings, Ltd., provided the well location and indicated that the well would only be used <br />for fire suppression. The Klein Bros. well is located approximately 1,150 feet northeast of the site, which <br />is outside of the study area. <br />4.1.2 Other Sources <br />Condor reviewed information available to the public through GeoTracker, the State Water Resources <br />Control Board's internet-accessible database system, and identified 21 groundwater monitoring wells and <br />three remediation wells (24 wells total) within the study area. These 24 wells are associated with a former <br />agricultural chemical distribution facility operated by Occidental Chemical Company (Oxychem), J.R. <br />Simplot Company, and PureGro Company Oxychem, located at 1904 West Charter Way, approximately <br />100 feet south of the Site. According to information available on GeoTracker, the groundwater beneath the <br />Oxychem site is contaminated with nitrogen and pesticides and is undergoing phytoremediation to exert <br />hydraulic control of shallow groundwater and to remove nitrate and volatile organic compounds from soil <br />and groundwater. Three of the Oxychem monitoring wells are screened at a deeper interval (ranging from <br />60 to 90 feet below ground surface); the locations of these three deeper zoned Oxychem wells are shown <br />on Figure 4 (Appendix A). <br /> <br />4.2 WELLS WITHIN 500 FEET OF THE SITE <br />Based on Condor's review of DWR's well records and communications with property owners, the City of <br />Stockton Municipal Utilities Department, and California Water Service staff, no wells are located within <br />500 feet of the site. The closest well is an industrial well used for fire suppression purposes located <br />approximately 1,250 feet northeast of the site. <br /> <br />4.3 OTHER POTENTIAL RECEPTORS <br />Condor reviewed aerial, topographic, and city street maps, California's GeoTracker and Department of <br />Toxic Substances Control's (DTSC's) EnviroStor online geographic information system (GIS) databases, <br />and other available public directory databases to identify other potential receptors such as schools, childcare <br />facilities, health care facilities, parks, and other pertinent sites located within the 1,000-foot study area. Two <br />locations were identified in the locations shown on Figure 4 (Appendix A). Additional receptor information <br />is provided in the following sections. <br />4.3.1 Schools and Childcare Facilities <br />No schools or childcare facilities were identified within 1,000 feet of the site. <br />4.3.2 Surface Water Bodies <br />Three stormwater basins are located in the study area. One stormwater basin is located at the southeast <br />corner of the former Helena Chemical Facility Site parcel, one is located approximately 575 feet north- <br />northwest on industrial property, and one is located approximately 675 feet north-northeast of the Site on <br />industrial property. The nearest surface water body that is also a sensitive receptor is the San Joaquin River, <br />CONDOR