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Re-Manufacturing, Ltd. -2- 17 October 1991 Inspection Report the fill area and not from past discharges to Eldorado's tank. The DTSC is the lead agency for the Eldorado Chemical tank investigation and closure. We discussed the possibility of coordinating the sampling around Eldorado's tank excavation with Re- Manufacturing's sampling of the surrounding fill area. We also discussed where to place the soil borings near Eldorado's excavation with Mr. Shaulis. The borings were positioned so that Eldorado Chemical could also collect samples for their own investigation and cut down on drilling costs. INSPECTION SUMMARY: The borings were scheduled for 6 and 7 August 1991 in the locations determined during this inspection. The borings around Eldorado Chemical 's tank excavation were positioned so that Eldorado Chemical could collect samples for volatile organic analyses and save on drilling costs. Mr. Moore stated that he would talk to Joe Fredricksen, the president of Eldorado Chemical Company, to see if he wanted to collect samples. 6 August 1991 OBSERVATIONS AND COMMENTS: I returned to the site on 6 August 1991 to observe the sampling at Re-Manufacturing and to collect split samples. I was on site while samples were collected from borings SB-2 through SB-8. Those borings are shown on Figure 1 . Ms. Kataoka was in charge of the sampling operation, collected the samples, and logged the soil borings. When I arrived on site, boring SB-1 had already been completed and they were starting on the second boring, SB-2. At roughly ten feet, the sample smelled like gasoline. The samples continued to have an odor to fourteen feet. Drilling stopped at fourteen feet and Water Work moved on to SB-3. Ms. Kataoka did not want to sample further in SB-2 until she spoke to Mr. Moore, who was not on site at the time. Two PID reading were measured from the samples collected at roughly eleven feet and fourteen feet. The initial readings were 199 ppm and 264 ppm, respectively. Additional PID readings for SB-2 and other borings can be found in Re-Manufacturing's 20 August 1991 preliminary assessment report for the soil contamination investigation. The borings were drilled using a hollow-stem auger. Samples were collected with a split spoon sampler, lined with brass tubes. The samples were divided between Re- Manufacturing, Eldorado Chemical , DTSC, and the Board. Some samples were analyzed as split samples, others were run for separate analyses. I split samples collected at roughly 5 or 6 feet below ground surface with Re-Manufacturing. Ms. Kataoka pushed some of the sample out of the brass tube and into the glass jars I brought for our laboratory. Since the samples were not homogenized, some variation in the results is expected. Mr. Shaulis was on site to collect split samples with Eldorado Chemical . Joe Fredricksen, president of Eldorado Chemical Company, was also on site. Ms. Kataoka discussed what was found in SB-2 with Mr. Moore. I told them that we would want to know the extent of the contamination. They decided to sample deeper in SB-2 to determine the vertical extent of the volatile organic contamination. I left the site when they began SB-9. Therefore, I wasn't present when they sampled SB-2 at greater depth. Mr. Shaulis remained on site to observe and collect additional samples. Sampling in SB-2 ceased at 41.5 feet below surface, where the sample had a PID reading of 230 ppm. Unfortunately, we still don't know how far the contamination has migrated