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7 . <br /> yn'4Y/� <br /> NOVENVIRONMENTAL #NC. O1 3 2007 3330 Cameron Park Drive, Ste 550 <br /> Cameron <br /> Park, California 95682 <br /> (530)676-6004-Fax: 530)676-6005 <br /> PPM /SERVICES <br /> November 6, 2007 <br /> Project No. E5450-06 <br /> Ms. Victoria McCartney <br /> San Joaquin County Environmental Health Department <br /> 304 East Weber Street, Third Floor <br /> Stockton, California 95202-2708 <br /> i <br /> Subject: Well Abandonment Letter Report <br /> ARCO Station No. 5450 <br /> 1617 West Fremont Street <br /> Stockton, California <br /> Dear Ms. McCartney: <br /> Stratus Environmental, Inc. (Stratus), on behalf of Atlantic Richfield Company (ARCO, a <br /> BP-affiliated company), has prepared this Well Abandonment Letter Report for ARCO <br /> Station No. 5450, located at 1617 West Fremont Street, Stockton, California. Groundwater <br /> monitoring wells MW-2, MW-3 and MW-4 were abandoned in accordance with San , <br /> Joaquin County Environmental Health Department (SJCEHD) regulations. A site plan <br /> depicting the location of this well (supplied by Secor International Inc.) is attached. <br /> Abandonment of these wells was approved in a letter from SJCEHD dated June 8, 2006. <br /> Prior to initiating well abandonment activities, a well abandonment permit was obtained <br /> from SJCEHD (copy attached). A licensed drilling contractor (Woodward Drilling Co., <br /> C-57 #710079) performed the well destruction activities. All work was completed under <br /> the direction of Stephen J. Carter, P.G. Ms. Victoria McCartney of SJCEHD was present to <br /> observe well abandonment activities. <br /> The area in the immediate vicinity of the abandoned wells was excavated to 5 feet below <br /> ground surface (bgs) using an air knife rig on October 26, 2007. On October 29, 2007, <br /> monitoring well MW-3 was abandoned by pressure grouting with neat cement. The well <br /> casing was then cut off at approximately 3 feet bgs and the cement allowed to spill out <br /> over the top of the casing. Wells MW-2 and MW-4 were destroyed by drilling out the <br /> well casing to the total depth of the well. These borings were then backfilled with neat <br /> cement placed with a tremie pipe. A concrete patch was placed over each former well <br /> location flush with the surrounding pavement. Waste material was placed in drums and <br /> will be removed for proper disposal by Belshire once waste characterization analytical <br /> results have been received. <br /> y <br /> K:IBP-ARCO Execut6545012007 Data PackageslARCO_5450_Wcll Abandon Ltr Report.doc <br />