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r <br /> X///7AE d 1244 Pyrites Way.*Gold River,CA.95670 <br /> E N V I R 0 T E C H , I -N,C . - - --. � �- Phone 916.851.0179 Fox 916.851.0177, TaILEree 1.800.242.5249. - <br /> �, GD�,ECrV�§i`'J <br /> January 14;12004 <br /> JAW <br /> 3 2004 . <br /> r e. • :.f - l,. tet•. .x .. -' . <br /> Mr. Nuel Henderson : -ENVIRONMENT HEALTH <br /> PERMIT/SERVICES' .. <br /> San Joaquin County Environmental Health Divisionl a,) <br /> P. O. Bok 2009 t z-J `J , s��P <br /> Stockton, California 95201 <br />' Subject: Addendum to Workplan for-:Ozone Sparging <br /> t <br /> t <br /> Moore'Petroleum Bulk Plant. <br />` 5491 F Street,Banta, California T <br /> Apex Project#'ERA02.004 <br />} Dear Mr. Henderson: . <br /> t Apex Envirotech, Inc. (Apex), has.been authorized.by Moore Petroleum (Moore) to provide this .' <br /> addendum to the,report.pr`oposing the addition of ozone sparging'to,-the.remediation system at the <br /> subject site (Figure.l and 2): The purpose of this addendum is to justify the locations and depths. " <br /> of the proposed ozone sparging wells:: Ten�wells were. proposed.as ozone injection points.to <br /> address petroleum constituents of the soil groundwater-interface around the north,'east and south <br /> th <br /> sides of the building, with a focus on reducing petroleum constituent concentrations along the 6, , <br /> r Street side. This will create a reverse,concentration gradient.to fhe',site:by reducing the-mass of <br /> petroleum constituents on site.` <br /> This report is based in part; on information obtained by Apex from Moore,.and is subject to <br /> modification as newly acquired information may warrant , <br /> a <br /> Air Sparge Point Installations <br /> 'Apex proposes to install an ozone sparge system to augment groundwater remediation at the site..The proposed ozone sparge system;will have'i 0 ozone sparge points on the-subject property(OS-... <br /> 1 through OS-10) at the locations identified ori Figure 3. The oz:one,.will,be directed at.the source <br /> of the methyl tertiary 'butyl ether (MTBE) and. other',petroleum cbnstituents .dissolving in <br /> groundwater at and beneath.tho smear,zone. <br /> The depth of the proposed.sparge pomts'.is.'approximately 25 feet below ground surface; with the. ' <br /> top of the 18-inch.diffuser-approximately '10-12 feet;below the-groundwater surface. At.the <br />