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a , <br /> INTERIM REPORT OF <br /> M1I:IT0RI1JG ?,"ELL Ii��TiiLLi�TIOi 5 <br /> I:F.i:Ti=Ci: f'u�.': CC,•�r:.i;) , 1•:.'.iY 1 FC-= C:._'FO^'..1'. <br /> The firI" of SCs Engincers has completed cur investigation of <br /> the F.anteca Bean facility located at 223 Moffat Street in <br /> Manteca. This report contains the results of wor}; related to <br /> th, installation of monitarina wells, evaluation of general <br /> soil and groundwater conditions and their chemical al.dlyses, <br /> and conclusions and recommendations regarding future work at <br /> this site. <br /> I. INTRODUCTION <br /> Under the supervision of SCS Engineers, a 700 gallon <br /> underground storage tank was removed from the property of <br /> Manteca Bean Company on November 17, 1986 (See report dated <br /> Dec. 19, 1986. ) The soil samples below the tank. yielded <br /> significant amount of total hydrocarbons and Cjtncr <br /> constituents. <br /> At the request of Golden Grain Macaroni Company, the firm of <br /> SCS Engineers conducted additional studies of the soils and <br /> groundwater conditions below and adjacent the tank, completing <br /> the work on March 10, 1987. <br /> r <br /> 11. 7=1ARY OF SITE INVESTIGATIONS AND WELL INSTALLATIONS <br /> A. Field Exploration <br /> Well permit applications were submitted and approved on January <br /> 29, 1987 (see Appendix A) . Test borings and -well installations <br /> began on February 4, 1987 and were completed the following day. <br /> Four monitoring wells were installed using a CME-75 drill rig <br /> and hollow stem augers. Well locations and well construction <br /> details are presented in Plates I through 5. <br /> Test borings were advan^ed with 7-inch. O.D. hollow-stem augers <br /> to the desired sampling depths. Soil samples were collected at <br /> five foot intervals from the ground surface to a depth of 25 to <br /> 30 feet with a 2 inch I.D. modified "California" sampler with <br /> brass sleeves. The soil retained in the brass sleeves was <br /> field screene"' for hydrocarbon compound vapors by the use of a <br /> r{, hand-held_ Photovac "TIP". The soil sample end--; were covered <br /> i <br />