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LFR Inc. The heavy equipment was then used to backfill the excavated area by transporting the stockpiled unaffected soil and soil taken from an unaffected part of the Site. The soil was constructed into a buttress and was compacted by the use of the heavy equipment with every deposited lift of soil. The buttress was built up approximately 40 feet above the water table against the 1H:1V cut-slope (Photograph 15). 5.7 Surveying Photograph 15 Final embankment slope (1H:IV) with initial Surveying of property boundaries, .lute mat placement site topography, groundwater monitoring wells and soil sample locations was performed by BLC, which was subcontracted through SCI. BLC was responsible for performing geodetic surveys of the site property boundaries, soil boring and monitoring well locations, and aerial photogrammetric and topographic control information. 5.8 Health and Safety Air Monitoring Two health and safety air monitoring contractors conducted sampling activities at the Site. LFR's subcontractor, SBES, conducted services during October 2003 through September 2004. SCI hired NES on behalf of the CIWMB to conduct health and safety air monitoring during July and August 2005. SCI conducted regular .> dust control measures throughout the '_' TT project, which inhibited and/or greatly reduced the likelihood of elevated dust levels in the ambient air (Photograph 16). SBES Summary. SBES conducted daily health and safety air monitoring of individuals, h background (ambient) conditions, and area stations during October 2003 through September 2004. In addition to conducting health and Photograph 16 safety air monitoring, SBES also conducted health and safety site Example of dust control measures used orientation training, kept Hazardous during excavation activities Waste Operations and Emergency rpt-RA_summ-Nov06-fina1-M5 Page 31