SITE INFORMATION AND CORRESPONDENCE

Home Browse Search

Overhead Door Company -2- 5 January 1990 The variance for the non-hazardous classification also applies to the estimated 1000 cubic yards of contaminated soil still remaining in the impoundment. However, it expires 31 December 1989. Therefore, the UDC must file for an extension of the variance, since the soil will not be disposed of by the 31 December 1989 expiration date. Charles Poole (Dallas Corporation) sent a formal request for an extension of the variance to Val F. Siebal (DHS) , on 20 December 1989. On 1 November 1989, Bob Niblack conducted an inspection of the site and observed soil sampling in the excavation to determine the extent of the horizontal contamination. The borings were hand augered horizontally into the sidewalls of the excavation to a depth of 5 feet. It was verbally reported that, at five feet into the southern sidewall , the sample contained 100 mg/kg nickel . Therefore, the extent of the contamination has yet to be defined. Since hand sampling beyond five feet is infeasible due to the hardness of the soil , four borings (using a drill rig) were scheduled south of the impoundment. Remediation Services planned to sample three borings on 18 December 1989 in a line, seven feet south of the southern sidewall . An additional boring was scheduled ten feet south of the same sidewall . In the event that the samples from the first three borings still contained elevated levels of nickel , the samples from the fourth boring would be analyzed. I conducted this inspection to familiarize myself with the site and to observe the locations of the borings. This inspections satisfies the requirement of an annual inspection under the Toxic Pits Cleanup Act (TPCA) . The last inspection was conducted on 1 November 1989, by Mr. Niblack. A more thorough discussion of the progress of the site investigation is presented in Mr. Niblack's 15 November 1989 memorandum to Greg Vaughn (see file) . The memorandum summarizes the tasks needed to complete the HAR and to fully comply with the TPCA. In Mr. Niblack's summary, he concludes that the HAR will be complete when the analysis of existing data is completed and the extent of the soil contamination is determined. OBSERVATIONS AND COMMENTS I met C. Curtis Carter, general manager of the CDC, at the site on 18 December 1989. By the time Mr. Curtis and I arrived at the surface impoundment, all drilling operations had ceased and the borings were being grouted. There were three borings in the street, approximately ten feet south of the southern sidewall . Brian Pletcher, from Remediation Services, was at the site. He explained that because of the overhead power lines at the back of the sidewalk, the drilling rig could not safely be operated seven feet from the impoundment, as planned (see Figure 1) . Instead, three borings were drilled and sampled ten feet south of the impoundment to a depth of fifteen feet. Mr. Curtis stated that if it is necessary to drill closer to the impoundment, he would bring in a smaller rig. I noted an old boring in line with the three new borings. Mr. Pletcher stated that the boring was drilled by Kleinfelder, ODC's former consultant. I also noticed that cuttings from the three new borings were disposed of on the northern floor of the impoundment. If the results of the borings show the soil is contaminated, it will have to be removed.