Laserfiche WebLink
Mr. Joel Weiss <br /> January 3, 1996 <br /> Page 2 <br /> secured by sandbags on a nightly basis (wind conditions permitting). All areas of excavation <br /> have also been fenced to prevent unauthorized access. <br /> To date, two unit trains of soil have been loaded at the site and the soil transported to the <br /> East Carbon Development Corporation (ECDC) landfill in Utah for disposal. The first unit <br /> train was loaded on October 19 and 20, 1995 and transported approximately 7,500 tons of <br /> impacted soil from the site. The second unit train was loaded on November 6 and 7, 1995 <br /> and transported approximately 8,400 tons of impacted soil. An additional two to three unit <br /> trains are anticipated to complete soil disposal. <br /> In a letter to Mr. Randall Smith of SPTCo dated 14 December, 1995, the Regional Board <br /> approved the backfilling of excavation areas A, B, C, D, and O. On your verbal <br /> authorization, excavation area O was backfilled with imported clean fill just prior to the <br /> loading of the last unit train. Excavation areas A, B, C, and D will be backfilled with clean <br /> imported fill during the second or third week of January 1996. The remaining excavation <br /> areas on site will not be backfilled and/or regraded until all excavation has been completed <br /> and confirmation sample results for both total and soluble lead have been reviewed. <br /> Requests to backfill remaining individual excavation areas will be submitted to the Regional <br /> Board with supporting data. Backfilling will not be initiated until approval from the Regional <br /> Board is received. <br /> The planned third monitoring well for the site has not been installed to date. This <br /> monitoring well will not be installed until after completion of all excavation, removal of all <br /> stockpiled soil, and any backfilling of excavated areas and regrading of the site. Delaying <br /> installation of the well until all of these site activities are complete assures that the new well <br /> will not be damaged by the heavy equipment movement typical of these activities. <br /> The next round of ground water monitoring for the site is scheduled for mid January of <br /> 1996. Ground water will be sampled from the two existing monitoring wells. Analytes for <br /> this and any future monitoring will include total petroleum hydrocarbons (EPA Method 8015 <br /> Modified), aromatic volatile organics (EPA Method 602), halogenated volatile organics (EPA <br /> Method 601), semivolatile organics (EPA Method 8270) and the following metals: barium, <br /> cobalt, chromium, copper, lead (not detected in previous monitoring; <0.005 milligrams per <br /> liter [mg/L]), vanadium, and zinc. Per our telephone discussion of September 21, 1995, the <br /> following analytes have been deleted from the ground water monitoring program for Old <br /> Tracy Yard: general inorganics, general minerals, and any of the California Assessment <br /> Manual (CAM) metals (except lead) which have not been detected during previous <br /> monitoring. Metals which have been deleted from the analytical suite are antimony, arsenic, <br /> beryllium, cadmium, mercury, molybdenum, nickel, selenium, silver, and thallium. <br /> 469-017.Itr/OI-03-96/u/kwrigh/keydata/oldtracy/letters <br />