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MEETING NOTES Page 3 May 7, 1999 subgrade fill was not part of Guinn's work anymore that Guinn's bid does not incorporate the survey costs for the subgrade fill. Pete said that Allied would work out payment with Guinn for this additional surveying. Jeff Gutierrez felt that this additional surveying shouldn't take long. • Subgrade Preparation—Forward will make first attempt at subgrade preparation for WMU D-88 and the Eastern Ash Pit. Guinn will follow up with completing the subgrade preparation, if necessary. • GCL, Geomembrane, GDN—GSE will plan on starting to line the WMU D-88 and Eastern Ash Pit around May 27. Regulatory approval should be received by this date. Vector requested that GSE cut conformance samples and interface shear samples. Scott and Dale will coordinate on the amount of sample required and where GSE should send the samples. Pete said that he recognizes that there are some potential issues with precipitation runoff damaging Guinn's work on the base of the cell if the WMU D-88 and Eastern Ash Pit slopes are lined before the cell base. Interim drainage measures could be implemented on the slope benches if precipitation was anticipated. Pete said that Allied would work with Guinn on these costs if necessary. Sangeeta informed ale that the top deck of the Eastern Ash Pit would use a double-sided textured geomembrane and a double nonwoven geocomposite drainage net instead of the single-sided textured geomembrane and geocomposite. The revised plans reflect this change. Sangeeta said that she had discussed this with Steve Eckhart so he was aware of the revised quantities. • Granular Drainage Material—The specification on the granular drainage material is still 0-3% although during WMU D-98 construction having more than 2 percent fines seemed to be too much. Sangeeta felt that the fines adhered to the granular drainage material during the WMU D-98 construction because of the wet weather. For WMUs D-95 and D-97, which were built in the summer, the fines content on the granular drainage material was always less than 2 percent. Sangeeta felt this was because some of the fines were lost during transport in the summer. Sangeeta said it would be preferable to use the same source as in the past, but would like to see less than 2 percent fines. Guinn said that the same source could meet a less than 2 percent fines requirement. The specification has been changed to require placement of the granular drainage material with a D4H LGP dozer unless the Contractor can demonstrate a larger piece of equipment won't damage the geomembrane. Guinn asked if they could use their modified D4, which isn't specifically a LGP. Sangeeta said this would be ok. Scott said that Guinn would have to perform a test pad demonstration to use anything other than a D4. • Geotextile—GSE will supply the geotextile and Guinn will install.