Laserfiche WebLink
C(r lLA'k 0 b ti <br /> � tj� }Z <br /> A S S Q C I A T E 5 I N C <br /> (9,000 m Im3+ 18,000 m Im3+ 17,000 mg/m') - 14,666 mg/m3 <br /> 3 <br /> = 14,666 mg/m3 TPHg x 24 5 1 vapor x mole TPHq = 4,165 ppmv <br />' 1 mole TPHg 86 27 g <br /> Assuming an average flowrate of 37 5 cfm during the combined 6-hour vapor extraction tests and <br /> using the values supplied by Sequoia Analytical of 24 5 liters of vapor per mole of TPHg and a <br /> molecular weight of 86 27 grams per mole of TPHg yields <br /> r = 4,165 1 TPHg x 375 ft3 x 60 min x 28 32 1 air x 1 mole TPHq x 86 27 q x 1 Ib <br /> 1,000,000 1 air min 1 hour 1 ft3 24 5 1 vapor mole TPHg 454 g <br /> = 2 06 Ib TPHg = 12 4 lbs of TPHg during the 6-hour test �o by E�F<� "C"UV ICA"q, <br /> hour 6'r ccrrr&F <br /> The same calculation for benzene with 24 5 liters of vapor per mole of benzene and a molecular <br /> weight of 78 grams per mole of benzene is shown below <br /> M = (140 mq/m3 + 240 mg/m3+ 4,200 mg/m31 = 1,527 mg/m3 <br /> 3 <br />' = 1,527 mg/m3 benzene x 24 5 1 vapor x mole benzene = 479 ppmv <br /> 1 mole benzene 78 g <br />' = 479 1 benzene x 37 5 ft3 x 60 min x 28 32 1 air x 1 mole benzene x 78 g x 1 1b <br /> 1,000,000 1 air min 1 hour 1 ft3 24 5 1 vapor mole benzene 454 g <br /> 0 2 Ib benzene = 1 3 lbs of benzene during the 6-hour test <br />' hour <br /> Laboratory results of the effluent vapor sample indicated a destruction efficiency of <br /> approximately 89 to 99 percent for TPHg and approximately 96 to 99 percent for benzene <br /> 60 AYR SPARGE PILOT TEST <br /> Anair sparge pilot test was performed in accordance with ATC's Workplan for Vapor Extraction <br /> and Air Sparge and Pilot Testing at Pacific Coast Recreation, 3755 Munford Avenue, Stockton, <br /> California, dated June 27, 2001 The purpose of this test was to evaluate air sparging as a viable <br /> remedial option for impacted soil and groundwater at the site and to collect data to design an air <br />' sparge system <br /> Installation of the air sparge pilot system included approximately 60 feet of trenching The <br /> trench contains two 2-inch diameter PVC pipelines The trench was installed from well AS i to <br /> the proposed remediation compound on the north side of the site The trench was excavated <br /> W 1163931reportslrifs doe 1 1 <br />