CORRESPONDENCE_1992-1993 - Laserfiche WebLink

Home Browse Search

'OkkAdwk File No. 20-1008-49.1 14W k%j K L E I N F E L D E R December 8, 1992 LOCATION As discussed in a meeting with the Central Valley Regional Water Quality Control Board on September 4, 1992, the location of the test pad will be the northeast comer of at the secondary landfill site. The actual location of the test pad will be established by the Engineer or representatives of San Joaquin County. The test pad will be constructed to allow a minimum of 50 feet spacing between any portion of the test pad and the slope crest of the secondary landfill. TEST PAD CONFIGURATION The test pad will be 150 feet in length. The first section of the test pad will be constructed of relatively clean or slightly silty sand, designated as SM/SP by the Unified Soil Classification System, mixed with 20 percent lone clay (by weight). Selection of borrow material for this section will be made by representatives of Kleinfelder, Inc. aided by representatives of the Engineer. The width of this section will be 47 feet. Section 1 will receive approximately 4 truckloads of clay. Each load is approximated to weigh,,.- 25 tons. Section 2, constructed next to Section 1, will also be 150' in length. Section 2 will be constructed of silty sand(SM) selected and excavated from the borrow site similarly to section 1 material and mixed with 20 percent lone Clay. The width of Section 2 will be 231/2 feet. Section 3, constructed next to Section 2, will have the same dimensions as Section 2. Section 3 will be constructed of sandy silt material (ML) and 20 percent lone clay. Both sections 2 and 3 will receive approximately two truckloads of clay. FIELD AND LABORATORY TESTING During the course of construction, the third party CQA monitor, Kleinfelder, Inc., will observe the preparation of the test pad. During the preparation of the test pad, Kleinfelder, Inc. will monitor compaction operations and through tests performed with a nuclear density probe conducted at the average rate of one test every 1000 square feet. Laboratory determinations of maximum dry density will be conducted according to the ASTM D-1557 test procedure on samples of the test pad soils sampled once the mixing process has been completed and prior to the commencement of compaction operations. Each test pad will be staked in the field by the Engineer prior to the commencement of construction. As previously mentioned, all other tests described in Table 7-3 of the CQA Plan, attached. Kleinfelder, Inc. will backfill rod holes made in association with nuclear density testing with bentonitye clay. SITE PREPARATION Prior to commencement of the test pad, the site shall be cleared of all brush, grass and any other organic matter which has grown subsequent to the completion of the foundation layer. Any foundation material removed during the course of this procedure will be replaced and the foundation layer will be restored to its original final grade. Any debris which may have collected at the designated site will also be removed during the process of site clearing of Copyright 1992 KLeinfeLder, Inc Page 2 of 6