CORRESPONDENCE_1971-1981 - Laserfiche WebLink

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January 20, 1981 Project 116-1.3 -2- Additional industrial wastes consisting of wet -solid sludges and contaminated soil 'were accepted for disposal in the Group .1 Trench Landfill area and were placed in Trench #3. Liquid wastes consisting of drilling mud and gas -well brines were disposed in Evaporation Pond #1. Table 2 below provides volume data on all Group l waste approved for disposal in Landfil\ Trench #3 and Evaporation Pond #1, In addition to the above Group 1 wastes, the L.A. Wlnchell Company of ' Sacramento disposed of 303 cubic yards of soil contaminated with battery acid during the months of November and December. This soil was disposed in Trench #3 and covered immediately with clean soil. Occidental Chemical Waste consisted of contaminated soil. Landfill trenches in the Croup l disposal area are checked each quarter for the presence of water 'n the leachate collection sump. During the fourth Quarter Monitoring periods, all trench sumps have remained dry. As previously indicated, regional decline in groundwater levels has caused Monitoring Wells #1, #2 and #3 to go dry, Monitoring Wells #4, #5 and #6 were installed to depth of 40+, and have always been dry. To insure our capability to accurately monitor site groundwater conditions, three new monitoring wells were installed during the week of October 6, 1980. These *ells were installed to depths between 115 feet and 130 feet in accordance with the specifications and details submitted with our third quarter report. Groundwater samples were collected from Monitoring Wells #7, #8 and #9 on November 10, 1980, Prior to sampling, each well was bailed to remove a volume of water equal to the well volume. � The sample was then collected and filtered through a #42 Whotman Filter Paper to remove suspended solids. The sample was then split and half of each sample was fixed with nitric acid to preserve for metal ions. Additional samples were provided to Mr. R. Van Ua Pohl of your staff' FMC proctor Gamble Occidental Drilling Hud Brine Month!bb|s-.� � October 4,532 290 U O 7,346 November 6,578 60 U 1,100 ' �,485 December 7'056 4O 762 0 4,330 TOTAL 18,166 390 762 1,100 18,161 NOTE: 1 bbl. = 42 gallons In addition to the above Group 1 wastes, the L.A. Wlnchell Company of ' Sacramento disposed of 303 cubic yards of soil contaminated with battery acid during the months of November and December. This soil was disposed in Trench #3 and covered immediately with clean soil. Occidental Chemical Waste consisted of contaminated soil. Landfill trenches in the Croup l disposal area are checked each quarter for the presence of water 'n the leachate collection sump. During the fourth Quarter Monitoring periods, all trench sumps have remained dry. As previously indicated, regional decline in groundwater levels has caused Monitoring Wells #1, #2 and #3 to go dry, Monitoring Wells #4, #5 and #6 were installed to depth of 40+, and have always been dry. To insure our capability to accurately monitor site groundwater conditions, three new monitoring wells were installed during the week of October 6, 1980. These *ells were installed to depths between 115 feet and 130 feet in accordance with the specifications and details submitted with our third quarter report. Groundwater samples were collected from Monitoring Wells #7, #8 and #9 on November 10, 1980, Prior to sampling, each well was bailed to remove a volume of water equal to the well volume. � The sample was then collected and filtered through a #42 Whotman Filter Paper to remove suspended solids. The sample was then split and half of each sample was fixed with nitric acid to preserve for metal ions. Additional samples were provided to Mr. R. Van Ua Pohl of your staff'