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f _ <br /> y <br /> T, <br /> rA <br /> APEX E NVI ROTECI-I,. INC. <br /> 7844 Madison Ave.,Suite 106, Fair Oaks, CA 95628 t61916.535.0200 Fax 916.535.0207 <br /> EXECUTIVE SUMMARY <br /> MOORE PETROLEUM BULK PLANT <br /> 5491 F STREET <br /> BANTA, CALIFORNIA <br /> The site is located at 5491 F Street, Banta, California, at the intersection of F and Sixth <br /> Streets. The site is located in a rural residential and agricultural area with private <br /> residences located adjacent to the property (Figure 1). <br /> Regional topography slopes to the northeast toward Tom Paine Slough, located <br /> approximately 1.5 miles north of the site. The site is an operating petroleum bulk storage <br /> and card lock facility. There are currently nine underground storage tanks (UST) and one <br /> underground septic tank at the site. There are four 10,000 gallon capacity gasoline UST, <br /> three 10,000 gallon capacity diesel UST, one 350 gallon capacity kerosene UST, and one <br /> 350 gallon capacity cleaning solvent UST. Figure 2 shows the locations of all UST. <br /> Apex began work on-the project with the groundwater monitoring conducted on January <br /> 14, 1994. Prior to Apex, work conducted at the site included subsurface investigations <br /> and groundwater monitoring by Earth Treatment Systems, Inc., of Manteca, California, <br /> Delta Environmental Consultants, Inc., of Rancho Cordova, California, Nations <br /> Groundwater Associates (Nations)of Sacramento, California, and Aegis Environmental, <br /> Inc. (Aegis), of Roseville, California. Figure 2 shows the locations of the six groundwater <br /> monitoring wells. <br /> It is important to note, the decrease in concentrations of total petroleum hydrocarbons, as <br /> gasoline (TPH-G), and benzene, toluene, ethylbenzene and total xylenes (BTEX) in MW- <br /> 1 through MW-6. Tables 1 and 2 summarizes the previous and current groundwater <br /> conditions at the site. <br /> Previous to January 14, 1994, recovery of floating liquid hydrocarbons (FLH) from <br /> monitoring well MW-1 was done by use of a product skimmer. The skimmer was installed <br /> by Aegis on April 9, 1993. The total of FLH (and associated water) removed from the <br /> site to date is approximately 20 gallons. Apex personnel removed the skimmer on January <br /> 14, 1994, due to the absence of floating free product in monitoring well MW-1. <br />