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File No. 20-3978-01.W12 KLEINFELDER January 14, 1997 ATTACHMENT A SOIL SAMPLING AND ANALYSIS EXISTING AND FORMER ABOVE GROUND STORAGE TANK LOCATIONS (PHASE I ESA RECOMMENDATION NUMBER 12) FORMER SPRECKELS SUGAR PLANT 18800 S. SPRECKELS ROAD MANTECA, CALIFORNIA 20-3978-01.W 12 January 14, 1996 INTRODUCTION Kleinfelder has conducted a Phase I Environmental Site Assessment (ESA) of the property known as the Former Spreckels Sugar Plant in Manteca, California (Kleinfelder Job No. 20- 3978-01.P01, dated October 18, 1996). Plate 1 shows the location of the Spreckels property. Several existing and historical above ground storage tanks (existing/former fuel oil tanks, caustic and acid storage, waste oil and diesel fuel) are located throughout the site. Underground piping is associated with the fuel oil tanks. Recent handling and spill prevention practices included spill containment structures, employee training and prompt documented clean up of spills. However, historical spill response and prevention was most likely not as stringent. Therefore, Kleinfelder recommended that soil sampling be conducted to evaluate the condition of soils at the existing/former above ground storage tank locations. This proposal/cost estimate includes soil sampling at the following locations: fuel oil tank and pump station (includes underground piping into plant), waste oil tank, diesel fuel tank, sulfuric acid tanks (2), liquid caustic tank, muriatic acid tank, hydrochloric acid tank, and the gasoline convault (Spreckels). Above ground tank locations identified during the Phase I ESA but nQj addressed by this proposal/cost estimate include oil measuring tanks noted on Sanborn maps within the plant area, the former diesel fuel farm tanks, and the Grover gasoline convault. 20-3978-0I.W12/207PE024 Page I of 01997,Kleinfelder, Inc.