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surface. Two tests were conducted for each material: one sloped MSW surface and and one level -deck MSW surface were used in order to capture potential differences in compactive effort and placement efficiency. Each test plot was a 50' square area marked by PVC pipes set vertically at the corners to assist the equipment operators in controlling material placement. The equipment operators were specifically instructed to place ADC materials within the test plots in a manner consistent with normal operations. Cover material was hauled from stockpiles, across the site's certified scales and to the test plots using Forward's 30 -ton off road dump truck (Caterpillar model D300) and placed using the same equipment (Caterpillar D8) and operator who normally perform that task. In order to determine the in-place density of a material, two pieces of information need to be determined: weight and volume: The weight of ADC placed within each plot was determined by running the D300 truck across Forward's certified truck scale as it carried each load from the stockpile to the test plot. The tare weight of the D300 was checked regularly during the test to ensure that accurate net weights were recorded. Staff from the LEA observed loading and weighing of the ADC materials to verify procedures, actual weights and to estimate pre -placement in -truck density. A potential variable in the weight of greenwaste ADC is moisture content, which can vary seasonally, (see Appendix B for further discussion). Volume is determined by multiplying length, width, and thickness of the placed materials. Length and width were controlled by careful placement of the weighed cover materials within each 50' square test plot. Placement of weighed loads of cover material continued until the MSW surface was covered to meet the requirements of 27 CCR. After placement and compaction was complete, small rakes and shovels were used to dig a series of eight or nine pot -holes down to the surface of the MSW. The thickness of cover material was then measured and verified by the LEA for each pot -hole by placing a shovel handle across the top of the hole and measuring the distance from the bottom of the handle down to the MSW surface. The measurements were averaged together to provide the thickness used to complete the volume determination for each test plot. Once a volume is calculated, the weight is divided by the volume and the resulting number is the weight per unit volume or in-place density. For the purposes of this -2 BRYAN A. STIRRAT S ASSOCIATES J:\A11ied\Forward\2006.0154 ADC Test\ADC Test Report\Final ADC Test Report Sec l.doc