Laserfiche WebLink
. s <br /> < 4dVIRQ�h"kanP' E F �f�om <br /> PER�!.T P Y <br /> P.O.Box 4848 <br /> 93 JUN 10 PH 1: 59 511 N.Brookhurst Street <br /> Anaheim,California 92803 <br /> June 7 , 1993 <br /> Mr. Philip Isorena <br /> California Regional Water Quality Control Board <br /> Central Valley Region <br /> 3443 Routier Rd, Suite A <br /> Sacramento, CA 95827-3098 <br /> RE: SITE INVESTIGATION UPDATE <br /> SHELL OIL CO. - STOCKTON DISTRIBUTION TERMINAL <br /> 3515 NAVY DR. , STOCKTON, CA. <br /> Dear Mr. Isorena: <br /> This letter is written to address comments in your letter of <br /> 5/10/93 regarding Shell 's Stockton Distribution Terminal. <br /> Your numbering sequence has been maintained for ease <br /> reference. The following are responses to your comments: of <br /> 1. Your letter addresses concerns with the inactivity of <br /> the extraction system. The system was turned o£f, as <br /> previously mentioned, because we are out of water <br /> storage space and do not currently have a viable <br /> disposal method. We are pursuing a possible one time <br /> discharge to the City of Stockton WWTP as one option for <br /> interim disposal. We are also developing a strategy to <br /> comply with the stringent requirements to be imposed <br /> upon Shell in order to get an NPDES permit from the <br /> regional board. <br /> You also had concern about the potential for further <br /> off-site migration of the dissolved plume. Hydrogeology <br /> of the site was investigated by Harding Lawson <br /> Associates and discussed in a report, dated May 3 , 1991, <br /> titled Preliminary Hydrogeologic Assessment, Shell oil <br /> Distribution Facility, Stockton, California. This <br /> report indicates groundwater velocities are in the range <br /> of 0. 016 to 0. 19 ft/day (5.84 to 69. 35 ft/year) . Based <br /> on these velocities and existing knowledge of the extent <br /> of the plume there should not be major concern over the <br /> potential for additional migration. Additional <br /> miratongl <br /> on the U. Si1 also be monitored <br /> which should berinstalwells <br /> ledby <br /> the end of August. <br />