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• I <br /> �. Kayo Status Report Page 6 zi <br /> October 30, 1987 <br /> 1 <br /> � Tracyy <br /> 'Env Assessment Consultants Phase I•. -. .Dames and Moore <br /> Phase . II Groundwater. Technology <br /> i . tot <br /> Remediati•`on Consultant Groundwater Technalo <br /> 9y. <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 /> monitoring - 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 groundwatei recovi�ry, well: and .groundwater treatment system has <br /> been'. instialled. `' They. system 'thas been operating `ince April 20, <br /> in.,order `to melt the low ,(aPProximately 300 ; <br /> 1987. :P Ping rade is set . ver air. emissions 'limit .The <br /> The ' um - <br /> galalons peray� F T ,�; <br /> h aqu er `is_ very ,`Iow ,yield:4icl however and a `higher. pumping ':rate E <br /> would probably. natbe appropriate. <br /> Air stripper influent and <br /> PS�j -,' ��'�.��� �g���'syl���£�� ��'` � '- zea �, � 'r ��'t s :: Y v ^,r i�+� �+ � _j.•. <br />