SITE INFORMATION AND CORRESPONDENCE

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Re-Manufacturing, Ltd. -3- 26 June 1991 Inspection Report include enough samples to define the extent of the contamination in the surface impoundment. Ms. Kataoka stated that they may collect more samples than were in the proposed plan. Samples were collected using a hand auger and a hammer driven 1/' \ sampling apparatus with brass tube liners. Mr. Moore's staff did most of the digging to collect the soil samples. The soil was very hard in most places. Therefore, to reach the deeper samples, a two-person power auger was used. The / soil samples were analyzed for total and soluble lead. Samples were collected at one to two feet and five feet below ground surface. I collected four split samples from the impoundment with Ms. Kataoka, SE-2 (same as JEM-SE-2) , LT-1, KT-5, and FS-5. The samples weren't true split samples, however. Ms. Kataoka and I each collected a three-inch brass tube adjacent to one another in the sampling apparatus. I collected three additional samples from the impoundment for separate analysis. (The locations of the samples I collected are shown on Figure 1 and a description of the locations is attached.) Sample number JEM5391-1 was collected in the eastern sidewall , sample number JEM5391-2 in the western sidewall , and sample number JEM5391-5 in the northern sidewall . Sample JEM5391-3 was collected in the fill east of the impoundment (between the impoundment and the tank excavation at El Dorado chemical ) . Sample JEM5391-4 was collected in the soil pile west of the surface impoundment, adjacent to the slough. Samples JEM5391-1 and JEM5391-2 were analyzed for both total and soluble lead (citrate WET) , while samples SE-2, LT-1, KT-5, FS-5, JEM5391-3, JEM5391-4, and JEM5391-5 were analyzed for total lead only. All of the Regional Board's SI samples were run for pH, although the holding times were exceeded. Because the ground was so hard, the digging was very slow. All of the shallow samples (1 foot and 2 feet below ground surface) were collected first. The two five foot samples I split with the consultant, KT-5 and FS-5, were collected at five feet below the surface. Since the five foot samples were the last to be collected, it was too late in the day to collect all the slough samples I wanted. I walked with Ms. Kataoka and one of Mr. Moore's staff up-gradient of the site in the slough to see where they were planning to collect their samples. One portion of the slough contained standing water. The slough contained debris, including battery casings. I photographed the slough on my return to the site. I left the site before the sampling was completed. Water Work Corp. 's sample results are included in their report entitled, "Addendum to Surface Impoundment Closure and Post Closure Maintenance Plan" . The results are summarized in Tables 4 through 6 and are attached. 7 May 1991 I returned to the site on 7 May 1991 with James Brathovde (TPCA unit) to collect samples in Mormon Slough. No one else was on site during the inspection. The samples were collected to supplement those collected by Water Work Corp. on 3 May 1991 . Sample locations are shown on Figure 2. A shovel was used to remove the top 4 to 6 inches of organic material from the slough. The sample was collected in a glass jar, using care not to include soil that was in contact with the shovel . Samples were then labeled, and immediately placed in an iced cooler. The shovel was cleaned with de-ionized water between sample locations. In addition to the slough samples, sample JEM5791-11 was collected from the drainage channel east of the surface impoundment and sample JEM5791-9 was collected west of the surface impoundment, near one of Re-Manufacturing's buildings.