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Site Background Information -Ripon Farm Service <br /> • Page 2 of 9 <br /> SITE HISTORY AND ACTIVITIES <br />' The RFS facility stores, batches, and delivers fertilizers in bulk and diluted forms, it has been <br /> operated by RFS for at least 45 years and the bulk plant is operated by 14 employees The primary <br />' activity at the RFS facility is the distribution of fertilizers,selected chemicals are transferred directly <br /> into assorted sizes of delivery tank trailers,which are then transported to farm locations for metered <br /> dispersion into an irrigation stream Following delivery, the tankers and trailers may be rinsed to <br />' remove fertilizer residue that maybe incompatible with subsequent fertilizer loads,such as between <br /> nitrogen-based and calcium-based fertilizer(UN32 vs Can-17, CN-9, thioCal) The rinse water is <br /> recycled into fertilizer blends or evaporated in a two-stage polyvinyl, concrete lined pond <br />' Secondaryto the bulk distribution is batch processing,whereby a stainless steel mixer 10-tan batch <br /> p g, y s { ) <br /> mixes drypotash,water,and liquid fertilizer additives to generate the liquid fertilizer blends that will <br /> be transported to farm locations Dry and liquid bulk fertilizer components are delivered to the site <br /> by contracted trucking firms, dry chemicals are stored in concrete-divided storage bins or a dry <br />' hopper,whereas liquid chemicals are stored in twelve large steel tanks under secondary containment <br /> All loading and mixing activities are continually supervised by RFS trained personnel,any spills are <br /> immediately cleaned up, swept-up, or recycled into the appropriate fertilizer blends, nese water is <br />' • containerized and recycled or allowed to desiccate within concrete holding ponds at the eastern edge <br /> of the RFS site <br />' Surface ram water from the fertilizer batch plant area does not leave the site, the water is collected <br /> and recycled into fertilizer blends or evaporated within the two-stage polyvinyl, concrete lined <br /> ponds In addition, no surface or mix water leaves the site, or is discharged to the site, rather, it is <br />' collected and recycled by RFS trained personnel <br /> Boxed and containerized herbicide and fertilizer chemicals are stored in the main storage/office <br />' building in the western portion of the site Additionally, the RFS facility stores and delivers spray <br /> oil for seasonal treatment of orchards and vines <br />' The RFS facility utilized the Federally-mandated Security and Training Program, a Hazardous <br /> Communication Plan and Risk Management Plan(Hazardous materials management plan-HMMP), <br /> as required by the San Joaquin County Office of Emergency Services (OES) and Ripon Fire <br /> tDepartment <br />' WELL SURVEY <br />' A survey of ground water wells was conducted on 18 November 1998 Three ground water wells <br /> within 2,000 feet of the subject property were identified as described below <br />' Advanced GeoEnvironmentai Inc <br />