SITE INFORMATION AND CORRESPONDENCE

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• • RE-MANUFACTURING LTD. -2- 24 January 1992 16 January 1992 Inspection As noted in previous inspections, the lower rip-rap was placed directly over the clay cap which exposes the cap to shrinking, swelling, cracking and/or future deterioration. This is a major change form the cap profile in the approved closure plan and will have to be addressed prior to the Board's final approval of closure. Mr. Moore also said he would put in the concrete drain as planned. Mr. Moore again expressed his desire to avoid the field permeability testing of the clay cap. He stated that all of the lab permeability test results on the cap had exceeded the minimum requirements. I told him that the field permeability tests and lysimeters were still required. Mr. Moore stated that he planned to ask the Board to waive the field permeability requirement. But if they didn't, he would do the tests. As Mr. Moore has been told many times in the past, since field permeability is a requirement of Chapter 15 regulations, the Board does not have the discretion to waive the test. The soil waste piles from previous excavations were still on site and are uncovered. Mr. Moore had stated that the waste would be disposed of at Chem Waste Management- Kettleman Hills. I asked Mr. Moore what his plans were for the waste piles. He said he would contact Chem Waste and determine what tests they need. As I left the site, I noted barrels containing soil from past borings that need to be disposed of in an appropriate manner. Water Work Corp. was also conducting the quarterly ground water sampling, beginning with MW-1. Ms. Kataoka stated that vandals had come on site recently and knocked over some barrels containing purge water. About 1/4 of the contents of the barrels had been spilled to the ground. The levels of contaminants in the purge water should be very low. There was a small puddle of reddish water at the outlet of the storm drain leading to Mormon Slough. The source of the red color is unknown. I also observed water in Eldorado' s tank excavation. I took photographs during the inspection and left the site when the crew broke for lunch. INSPECTION SUMMARY: The landfill closure is proceeding after about a month long break. The additional rip rap and concrete drain are scheduled to be installed by 24 January 1992, according to Mr. Moore. Additional work is required to complete the closure, including installation of lysimeters and field permeability tests, as proposed in Re-Manufacturing's 5 October 1991 "Surface Impoundment Closure Construction Quality Assurance Plan" . The stockpiled contaminated soils will be disposed of at Chem Waste-Management. JEAN McCU�-� Water Resource Control Engineer JEM:GKV:jm