Laserfiche WebLink
r <br /> 7 <br /> \ RECEIVED <br /> THE ,) 0 CT 2 4 1990 <br /> SOUTHLAN D <br /> CORPORATION ENVIRONMENTAL HEALTH <br /> October 22, 1990 PERMIT/SERVICES <br /> San Joaquin County <br /> Local Health District <br /> C/o Ms. Laurie Cotulla <br /> 1601 E. Hazelton Ave. <br /> Stockton, Ca 95201 <br /> Re: Southland property #20680 <br /> 9110 Thornton Road in <br /> Stockton, Ca <br /> Dear Ms. Cotulla: <br /> I am enclosing to you a report dated October 3, 1990 which <br /> summarizes the operation of the vapor extraction soil <br /> remediation system located at the above referenced site. <br /> This report summarizes activities through September 30, 1990. <br /> A letter from your office dated October 15, 1990 suggests <br /> that Southland continue to operate the groundwater treatment <br /> system as well as the vapor extraction system "until accept- <br /> able groundwater quality is achieved." I would like to peti- <br /> tion to the accomplishment of that very goal is at hand. <br /> Ground water samples taken from the recovery well and the in- <br /> fluent pipeline to the air stripper indicate that, drinking <br /> water standards were exceeded once during the previous twelve <br /> (12) months. This event occurred on January 25, 1990 when <br /> 1.0 parts per billion of benzene was detected. While some <br /> monitoring wells onsite contain levels of gasoline con- <br /> stituents above the state action standard, these constituents <br /> do not seem to be making there way to the recovery well. <br /> Because our water treatment system has over the past year <br /> processed predominately clean water. And because vapor con- <br /> centrations are rapidly diminishing as shown in the enclosed <br /> report, Southland intends to discontinue remedial operations <br /> at this location at the end of December 1990. It is our in- <br /> tention to leave the existing water treatment system dormant <br /> but in place with all permits kept current, while removing <br /> all vapor extraction equipment located above ground. Activ- <br /> ity on site would be reduced to quarterly ground water <br /> monitoring for a time into the future which has yet to be de- <br /> termined. <br /> SOUTHLAND ENVIRONMENTAL SERVICES/ LOCATION 2987 <br /> 5820 STONERIDGE MALL ROAD/SUITE 310/P.O. BOX 404/PLEASANTON,CA. 94566/PHONE (415) 463-2711 <br /> FAX (415) 463-3378 <br />