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i -F'•. �4- 1 Ef �v P - SACRAMENTO Letter to Mr, Richard McCombs January 5, !988 Page 3 Assessment Pesults A visual inspection of the buildings, operations yard, wastewater Ponds, and adjacent properties was conducted on foot and by vehicle. Th:, facility driveway and parking lot are paved with four-inch thick asphalt. The remainder of the operations yard is lined with concrete. The entire site is enclosed within a six-foot high chain link fence which is topped with barbed wire. The facility buildings are constructed of wood, steel, and cincrete and many were demolished or were scheduled for demolition. The wine barrel storage warehouse and the distillation building were structurally weak and considered unsafe at the time of the site visit. These buildings are constructed with wood beam frames. The concrete wine fermentation building is constructed of precast concrete slabs. The fermentation building has 38 above-ground vats and 8 sumps, all of which are constructed of concrete. The vats and sumps were in good condition and no evidence of leakage was observed. The wood and steel chemical storage building was demolished on December 14, 1987. The buildingwas y trisodium phosphate, sodium caronate Previously and used the storage of compounds. ing •'There was no evidence of contamination resulting from any spills and, according to Nr. Beck, there have never been any spills. Insulation which contained asbestos was present on equipment in the distillation building. According to Nr. Beck, the asbestos-containing materials were removed during July, 1987, and disposed of by an asbestos removing contractor. The remaining portions of the bui}ding were demolished on December 14, 1987. e A 15,800-gallon underground fuel storage tank was located just north of the distillation building. The tank contained No. 2 diesel fuel as a backup fuel source for the natural gas-powered distillation boiler. The tank may also have contained bunker C oil. The exact age of the tank is unknown. The tank is constructed of concrete and was removed during January, 1987. At the time of Versar's assessment, the 14-foot deep tank excavation pit was approximately half filled with rainwater runoff (see Photo 1, Attachment 11). The excavati.on..__s.idewa?-ls--exhibit---- - - - -----s-ignif.i.cant---contamination —At-thd time of removal, soil sampled beneath -{-- -- — -- - - - ...--.-- ---_--- the tank idantified hydrocarbon contam:nation at levels --- ---------- - 2Z,000 parts per million greater than o H contaminated soil of the was to be excavated Asingtheavy equir. pnentland treated On Site beginning December 21, 1987. for the treatment of the soil have not beeneobtainedair fromemissions Sanprmits Joaquin County Air Pollution Control District. Although a plastic sheet has been placed under the excavated soil, the top of the pile was not