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4P <br /> July 5 1990 <br /> '- r. Kvle Christie <br /> ARCO Products Company <br /> 3000 Alameda de las Pulm_ <br /> Post Office BOX 5$11 017-3214-2311 <br /> San Mateo. C:aLifornia 94403 <br /> Subject: Results of Soil Vapor Extraction System Pilot 'rest__ <br /> ARCO Station 434. Lodi.California <br /> w_ Dear Mr. Christie: <br /> erformed a series of pilot tests on the <br /> On lune 27, 1590, grown and Caldwell Consultants p y Is A.RCO's) Station 434,501 East <br /> vapor extraction wells located at ARS moose of thests ettests were to gather information for <br /> Kettleman Lane. Lodi. California. pure the pilot <br /> use in designing a soil vapor extraction system. e� areas vaporvolumetri�flowramsand <br /> tests were: (1) determine the relationship betwe <br /> vacuum. (2) determine the area of influence that a tested vapor well has on surrounding <br /> s of <br /> subsurface soil in the vadose zone, and 13) determine ca, wereconmmend thatvapor <br /> hvdracarbons in the a c.tracted soil vapor. Bated on his test,tween the three or well manifolds and that the <br /> extracted at a he rate e trre0 ated b thermal <br /> he mal oxiedation or catalytic oxidation. <br /> extracted vapors <br /> �s shown on Figure 1, the area where the vapor extraction and treatment is proposed is <br /> riirectiv behind ARCD 5tatic�n 434. Presently there are two appraacites for constnor)a a <br /> system in this area. (1) thermal oxidation or catalytic oxidadon (processor} and <br /> treatment y reclud+:siting the processor <br /> (2) activated carbon absorption. Since this area is small and may P be located on the <br /> CL <br /> ubic <br /> on ground level due to space limitations ss soil vaporse incinerationuat1approz ma iy 100 to 15. flow <br /> roof. Typical roof-mounted units can p <br /> to their light weight c 150 fm for Musnstructi . <br /> the <br /> rn. <br /> feet per minute (cfm)due dfold line, or 30 <br /> rates during the pilot tests were approximately <br /> to SO cfm for each vapor well. <br /> -_---The pilot- was performed on all she existing soil vapor wills. <br /> '� 15-horsepower motor i <br /> -- -- - <br /> or.vaporrswells r t rotor <br /> and vacuun pump <br /> was connected to each isolated-vapor well-well <br /> to the <br /> e at <br /> respective 5-inch manifold line. vacuumwas then withdraw vichnfriirn the t isolated welnch l o�nwells <br /> at the vacuum pump inlet Soil vapor <br />