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w <br /> 41 <br /> VALON { <br /> ' ENVIRONMENTAL <br /> L <br /> CONSULTANTS f Irl <br /> VIOL- <br /> 131 NORTH TUSTIN AVENUE • SUITE 213 •TUSTIN,CALIFORNIA 92780 - 1J" AV <br /> 19,P 1 SkIQ F.PfOINT COURT• SUITE F121 •ALAMEDA,CALIFORNIA 94501 <br /> TFL:(714)836-6632 • FAx:(714)836-6642 f ©,7 TEL:(510).521-2441 •.FAx:(510)521-2607 <br /> January 5, 2000 <br /> Mr. Michael Infurna <br /> San Joaquin County Environmental Health Services <br /> 304 East Weber Avenue, 3rd Floor <br /> Stockton, California 95201-0388 <br /> ._Subject. Abandonment;,of Four=Monitoring W---ells-at2-22--North—El­Dorado -S-tribelin Y <br /> Stockton, California. <br /> Dear Mr. Infurna: <br /> This letter report documents the abandonment offour groundwater monitoring wells located <br /> at 222 North EI Dorado Street in Stockton, California. Three of the four wells; MW-1, MW-3 <br /> and MW-4 were abandoned on September 28, 1999. The remaining well, MW-2, was <br /> abandoned on December 29, 1999. All of the wells were abandoned by over-boring methods <br /> under the oversight of the San Joaquin County`Environmental Health Department (permit <br /> number 020571). <br /> Three, two-inch monitoring wells and one, four-inch monitoring well were abandoned. The <br /> two-inch wells were abandoned ,using an eight-inch augur, and the four-inch well was <br /> abandoned using a"ten-inch augur. All wells were aver-bored to a depth of one foot below <br /> the total depth of the well. Each well was measured prior to over-boring. Once the over- <br /> boring was completed, the borings were backfilled by trimie methods with portland cement <br /> and all soil cuttings were drummed for disposal atthe nearest landfill. One composite sample <br /> was collected from the drummed waste and was analyzed for Total lead, Total Petroleum <br /> H'ydr-ocarbons as-Gasoline'(-TPH-G),--and_for-Ber►z-ene To.l.uen.P _Ethyl-benz.ene,.and Xylene <br /> (BTEX) by EPA method 8015/8020. A total of nine drums of soil and four drums of water were <br /> generated during the abandonment operation. Seven drums of soil cuttings have been <br /> disposed of at Vasco Road Landfill and two,drums of water have been disposed of at Seaport <br /> Environmental (Attached). The most recent abandonment activities leave two remaining <br /> drums of soil cuttings and two remaining drums of water at the subject property. /This waste <br /> is scheduled for removal and proper documentation from the disposal facilities will be <br /> forwarded to your office once received. f . <br />