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r <br /> Appendix A <br /> Site Background Information <br /> RIPON FARM SERVICE INC. <br /> 22871 South Highway 99 Ripon, California <br /> GENERAL BACKGROUND <br /> The site is located in a flat industrial/commercial area in northern Ripon, south of Jack Tone Road <br /> (Figure 1) The site is currently operated by Ripon Farm Service Inc (RFS), a company that stores, <br /> batches, and delivers fertilizers in bulk and diluted forms The eastern portion of the site is covered <br /> with dirt and gravel and consists of a wash-rack containment area with two concrete holding ponds <br /> and two storage buildings (Figure 2), the central portion is paved with asphalt and concrete and <br /> consists of bulls fertilizer preparation in containment areas and storage buildings,the western portion <br /> is covered with compacted gravel and asphalt and consists of a storage building/office,truck scale, <br /> and a former automotive shop Jimco Truck Stop is located immediately north of the site <br /> A petroleum-hydrocarbon release from former, leaking underground storage tanks (USTs) at the <br /> northwestern portion of the site is currently under assessment and remediation,utilizing five ground <br /> water monitoring wells and an assortment of remediation wells Remediation by soil vapor extraction <br /> and air-sparging techniques have mitigated a significant portion of the dissolved hydrocarbon plume <br /> under the western portion of the RFS site <br /> • <br /> SITE BACKGROUND <br /> The site is located in a flat industrial/commercial area in northern Ripon, south of Jack Tone Road <br /> (Figure 1) The site is currently operated by Ripon Farm Service, a company that stores,batches and <br /> delivers fertilizers in bulk and diluted forms The eastern portion of the site is dirt and gravel covered <br /> and consists of a wash-rack containment area with two concrete holding ponds and two storage <br /> buildings(Figure 2),the central portion is asphalt and concrete covered and consists of bulk fertilizer <br /> preparation in containment areas and storage buildings, the western portion is covered with <br /> compacted gravel and asphalt and consists of a storage building/office, truck scale and a former <br /> automotive shop <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 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 /> Advanced GeoEnvironmental,Inc <br />