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of/za/uu 10:56 TF19163645633 HLA SACRAMENTO 10002 <br /> �13 Ze <br /> Cd <br /> f --� <br /> SUE HISTORY AND PRS ons Wax <br /> Previous She Iaysdigstions <br /> Previous work at the Site has been performed under the regulatory oversight of the PHSJEHD <br /> and the RWQCB and is briefly outlined below: <br /> • Removal of underground storage tanks by TVG in 1987. <br /> 4 Installation of six monitoring wells in three uses. <br /> • Monitoring weilS MW-I,MW-z.and MW 8 ftceitech, 1987). <br /> • Monitoring well MW-4(Exceltoch, 1988). <br /> • Monitoring wells MW-5 and We(WaterWork, 1989). <br /> 4 Quar6erly monitoring'activities from third quarter of 1989 through second quarter of 1994 <br /> (various reports by Waterwork and RMNA, 19a to 1994). <br /> i Q=ndwater pump and treat system second quarter of 1991 through sec6nd quarter of <br /> 1984(various reports by WatnWork and RESNA,1991 to 1994). <br /> ♦ Soil and groundwater investigation-in two phases, 1994 and 1995 (RAH Environmental <br /> 1995a k b). <br /> • Soil borings SB-1 to SB-7:soil and groundwater sam <br /> • Hand augered borings HAI to HAS within the forlikft shop: soil and groundwater <br /> sampling. <br /> + Additional soil and groundwater investigation 1998(Draft SHCOR report). <br /> • Safi borings SB-8 to SB-10: soil and groundwater sampling. <br /> v HLA review SBMR work and recomeuds additional investigation UH.A,August 1997) <br /> 4 MA samples monitoring weds and submits results to PHMM(MA, September,. 1997 <br /> The locations of the monitoring wells and soil borings,the app=dmate location and; <br /> dimensions of the former USTs and the excavation,the forklift shop and other relevant <br /> features are shown on Plate S. <br /> k <br />