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N icy <br /> Y <br /> r <br /> F <br /> 4 Mr. John Margowski July 26, 1991 <br /> - Wickland Properties <br /> 1765 Challenge Way <br /> Sacramento, Ca. 95814 <br /> ^� + (916) 921-1100 <br /> FAX (916) 921-3510 <br /> RE: Update Assessment and Status Report #6 including the results <br /> of the vapor recovery with the January-February-March, and April- <br /> May-June, 1991, quarterly monitoring at former Regal Station 604, <br /> a located a 1448 N. E1 Dorado Street, Stockton, California. <br /> Dear Mr. Margowski; 6 <br /> The following is the update of events that have occurred at this <br /> i site since Update Status Report 05-December, 1990. <br /> 4 <br /> LOCATION <br /> i <br /> Regal Station 604 (parcel # 139-020-08) is located at 1448 N. El <br /> Dorado and Harding Way, Stockton, San Joaquin County, California. <br /> The site is in projected section 2; TiN; R6E• Hyn � <br /> approximately 14 feet above mean sea leve.. x, � i�in�g <br /> ob( � ate i� et <br /> � fit+ ix ra v_ <br /> 1 UPDATE STATUS REPORT #5 (December, 1990) CONCLUSIONS AND <br /> RECOMMELMATIONS: <br /> ' CONCLUSIONS <br /> The results of ground water monitoring, November 21, 1990. <br /> 1 indicate that the ground water has dropped approximately eight <br /> Peet since early January, 1990, and is flowing predominately to <br /> the southeast. Chemical results of the water samples taken from <br /> the monitor wells show contamination to the ground water with <br /> gasoline range hydrocarbons, see Table I. <br /> Soil contamination is limited to between the 25 foot and 40 foot <br /> { depth of the eastern and western portions of the pump island area <br /> and southeast of the tank excavation, near soil boring SB2, see <br /> Figure 3B. This contamination is of gasoline range hydrocarbons. <br /> A vapor extraction source test indicates that approximately 59 <br /> pounds of gasoline range hydrocarbons can be pulled from the <br /> formation per day via wells P1, P3 and ER at a flaw rate of 30 <br /> cubic feet per minute. Also vacuum readings taken from the ground <br /> a S <br /> �} page 1 <br />