WORK PLANS - Laserfiche WebLink

Home Browse Search

SJVAPCD September 12,2003 Authority to Construct/Permit to Operate Page 3 Based on the highest influent concentration (160,000 mg/m3) observed during the feasibility test, and considering the destruction efficiency (98 percent) of the proposed equipment, the estimated mass emission rates for TPHG with a maximum flow rate of 200 scfm is approximately 9.25 pounds per day (lbs/day). Since the oxidizer units are generally identical with the same manufacturer's destruction efficiency of 95-98 percent, the emission rates for these units will also be identical. Stratus anticipates the influent soil vapor petroleum hydrocarbon concentrations to the proposed units to be similar or less than the concentrations observed during the feasibility test, and hence, lower mass emission rates. Table 1 presents the maximum stack emission parameters for catalytic mode of operation. These parameters are based on the maximum capacity of the blower and oxidizer. SVE SYSTEM START UP AND OPERATION Stratus proposes to conduct system start-up and source testing programs for the SVE remediation systems during the first seven days of system operation. The following parameters will be monitored and recorded on field data sheets during the system start up: • Vapor extraction rate, • Applied vacuum at each vapor extraction well, • Influent flow into the system, and • PID measurements for organic vapors from the extraction wells. During the source testing, two sets of influent and effluent air samples will be collected from each SVE unit and forwarded to a state-certified laboratory for analysis. The first set of air samples will be collected on the system start-up day, and the second set of air samples will be collected seven calendar days after the start-up date. The air samples will be analyzed on a 24-hour turnaround basis for TPHG by United States Environmental Protection Agency (USEPA) Method 8015, and for benzene, toluene, ethylbenzene, total xylenes (BTEX), and MTBE by USEPA Method 8260. Analytical results will be used to calculate the destruction efficiencies of the two SVE systems. Manufacturer's literature states that the destruction efficiency of both the oxidizer units for petroleum hydrocarbons is 95 to 98 percent. Table 1 presents the maximum stack emission parameters for catalytic mode of operation. These parameters are based on the maximum capacity of the blower and oxidizer. They do not necessarily represent typical operation flow rates of the system. Upon receipt of analytical results, a source test report will be prepared and submitted to San Joaquin Valley Air Pollution Control District(SJVAPCD) presenting the analytical results of vapor samples, tabulated field observations, and destruction efficiencies of the system. P:\Bp-Arco for URS\6100\Correspondence\Arco 6100 ATC appGcationAm