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' 16 December 2005 <br /> AGE-NC Project No. 04-1214 <br /> Page 2 of 8 <br /> 2.1. 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 may be 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 /> Secondary to the bulk distribution is batch processing,whereby a stainless steel mixer(10-ton batch) <br /> ' mixes dry potash,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 are continually supervised-by RFS trained personnel; any spills are <br /> immediately cleaned up, swept-up, or recycled into the appropriate fertilizer blends; rinse 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 rain 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 /> t 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 /> Department'. <br /> 2.2. REGIONAL GEOLOGICAL/HYDROGEOLOGICAL SETTING <br /> ' The site is situated within the Great Valley Geomorphic Province of California, a large, elongate <br /> northwest tending, asymmetric structural trough. The Great Valley Province has been filled with <br /> ' Advanced GeoEnvironmentsi,ine.. <br />