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<br />(Page 2) <br />NINE ID f~OR. PROSPECTING ID ~ .. N-80-244. <br />INSPECTION DATE 30-29-94 INSPECTOR'S INITIALS ACS <br />OBSERVATIONS <br />A monitoring inspection was conducted of the Phase 1 leach pad construction. Geotextile <br />deployment over the textured geomembrane component of the composite liner in the pregnant <br />solution storage area had been completed prior to my arrival at the site. The <br />geomembrane/geotextile installation crews had then gone home for the day. <br />Soil liner fill was being placed and compacted in the area where the process plant building <br />will be tied into the leach pad liner. Terry Mandziak stated that several nuclear density <br />testa would be conducted in this area prior to geomembrane installation. There are some ripe <br />in the previously installed and temporarily anchored VLDPE adjacent to the process plant <br />location which will have to be cut away prior to tying in the new VLDPE extending out from <br />the building. <br />A haul road constructed on the drain cover fill on the south aide of the pad was inspected. <br />All roads on the drain cover are required to be on a minimum of 5 foot thickness of fill. <br />This minimum thickness is necessary to prevent compaction of the drain cover, and to protect <br />underlying liner. The area where the road curves and levels to parallel the lower anchor <br />trench appears to be constructed on less than 5 feet of fill. This is based on observation <br />of PVC pipes on either aide of the road that had been installed for grade control. The <br />thinner than specification road segment was noted by Carl Hount on the day previous to this <br />inspection. The Division considers the 5' thickness to be an absolute minimum specification, <br />and although this section of road ie probably no more than 3 to B inches less than 5', it was <br />agreed that the road would be brought up to grade. <br />Storm water controls (straw bales) were inspected in Arequa Gulch below the Carlton tails. <br />The north aide upland diversion ditch is under construction and would generate sediment to <br />Arequa Gulch during and after a storm. The straw bales installed are properly located, <br />anchored. and staked to control sediment from the ditch construction, but will have~to be <br />maintained after each significant precipitation event. <br />Ames Construction was placing leak collection fill in the pregnant solution storage area. <br />Trucks were accessing the pad from the north side, and three dozers, one loader, and an <br />elevating scraper were distributing the fill in three foot lifts. Laborers were removing <br />oversize and controlling wrinkles in the geomembrane, and QA personnel were observing the <br />operation, and collecting samples of the fill for sieve testing. One sieve sample was <br />collected at 15:00 while I was on site. Spacing of the 4" perforated pipes at the base of <br />the leak collection fill was measured and found to meet the 50' minimum spacing criteria. <br />The contractor was backfilling the toe berm crest anchor trench during the late afternoon. <br />The backfill was Ironclad material (soil liner fill) which was being placed in thin lifts and <br />compacted with a hand held vibratory compactor. The entire length of the toe berm anchor <br />trench was inspected to determine that the geomembrane extended into the trench far enough <br />to be wrapped up onto the back wall. No problems were noted. ~- <br />The other major earth work in the pad area this day was reduction of Hill No.l in the <br />northeast part of the pad to grade. The material from Hill No. 1 reduction ie being used to <br />construct the Highway 67 realignment. <br />cc: Berhan Reffelew <br />Carl Mount <br />I & E Contact Address <br /> ^ CE <br />NAME John .Hardaway ^ BL <br />OPERATOR Crioole Creek & Victor Gold Co. ^ FS <br />STREET P.O. Box 191 ^ HW <br />CITYJSTATE/ZIP Victor, CO 80860 ^ HMWMD (CH) <br /> ^ SE <br /> ^ WQCD (CH) <br /> ^ OTHER <br />