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k <br /> Kayo Status Report Page 6 ' <br /> October 30, 1987 <br /> f <br /> Tracy, . <br /> v,« Assessment Consultants: Phase I Dames: and Moore. t <br /> Phase II - Groundwater :Technology " <br /> Remediation Consultant: Groundwater Technology <br /> The underground tanks were removed on October 30, 1986. <br /> Contaminated Soil in the tank backfill and beneath the tanks was <br /> removed. Dames and Moore installed three monitoring wells on <br /> 'December 12, 1986. Subsequent water sampling showed minor <br /> contamination ranging from 200 to 400 ppb benzene. The report <br /> for Phase I investigation was submitted on February 3, 1987. <br /> Groundwater Technology, Inc. has conducted Phase II of the <br /> subsurface investigation. This work consisted of installing, <br /> five monitoring wells near the boundary of the property and <br /> offsite near the . northeast corner of the property. The report <br /> with recommendations was received on June 10, 1987 and was <br /> submitted on June 12, 1987. <br /> Groundwater Technology recommended that an additional off site <br /> _ *onjtoring -well be installed across Eleventh Street and up- <br /> gradient from the Kayo site. This well was installed on July 9, <br /> 1987. Significant contamination was found. Report discussing <br /> off-site work- submitted to RWQCB October 8, 1987. Groundwater <br /> contamination originates off-site, no further work anticipated. <br /> Econo Station <br /> 7601 Greenback Lane <br /> Citrus Heights, CA <br /> Env. Assessment Consultants: Phase I - LBME <br /> Phase II - Groundwater Technology <br /> Remediation Consultant: Groundwater Technology <br /> This station is closed and will not be reopened by Kayo. Kayo <br /> proposes to sell this station. The underground tanks have been <br /> removed and the tank pit backfilled with clean pea-gravel. <br /> A gr.oundwater .recovery well and- groundwater treatment system has <br /> jbeen Installed. The system has been operating since April 20, <br /> >1987The 'pumping rate is set . very .- joi. '.{approximately ,300 <br /> 4_}gallons=per-- day).;,.In order to meet the ai:r,,emissions Limit. ,The <br /> _� equ1fei' is very low_:yielding, however; and a higher .pumping: rate <br /> would probably not be appropriate. Air stripper influent and <br />