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r�. <br /> Equipment Specifications <br /> Ekholm Property f,,= F� �: <br /> 1702 Jackson Street 17 17 <br /> Escalon, California <br /> • Carbon - The carbon canisters chosen were Westates Model VSC 200 units. Based on <br /> a flow rate of 100 scfrn and anticipated concentrations taken from the RESNA pilot <br /> test results, calculations were done using a breakthrough time of 8 days. This gave a <br /> carbon usage of 20.96 pounds in 8 days time. Assuming a 20% working bed capacity <br /> for the 200 lb units, 40 pounds of carbon are available to adsorb VOCs. These <br /> calculations are attached. <br /> The air samples taken during our brief pilot test showed that the airstream would be <br /> virtually free of contamination with no vapor treatment. Although this may be the <br /> case, maximum influent concentrations were calculated that would justify the use <br /> of small carbon units (200 lb). This was done to be conservative, with the agreement <br /> that if sample results once the system is running are low enough, the system will be <br /> modified and the carbon units removed. These calculations are also attached. <br /> • Blower - The blower was chosen based on RESNA pilot test results. They measured <br /> approximately 30 inches of water at 100 scfrn. We chose a blower curve that could <br /> handle approximately 58 inches of water at 100 scfm (to account for pressure loss <br /> across other equipment) and approximately 38 inches of water at 150 scfrn. <br /> • Other system components - A relief valve with a maximum setting of 4.5 psig <br /> (blower manufacturer recommendation) was ordered to protect the blower and <br /> other system components. A filter was also ordered from the blower manufacturer <br /> to protect the blower from dust and other particles in the air stream. <br /> • Gauges - Vacuum gauges should be able to read 0-60 inches of water. Air velocity <br /> gauges are to be installed which read in feet per minute. This will be converted to <br /> standard cubic feet per minute for reporting purposes. Sample ports are installed at <br /> each well head and at the system influent and effluent. Air samples can be taken <br /> from these ports, as well as vacuum, flow and temperature measurements with <br /> portable instruments. <br />