Laserfiche WebLink
GETTLER R <br /> � * YAN INC: <br /> WORK PLAN FOR ADDITIONAL SUBSURFACE'ASSESSMENT <br /> ,'AND REMEDIAL-ACTION <br /> y X31 .'• d; '•l r_ Y ' k `.... ', �. — <br /> at <br /> Fortner Unocal Service Station No. 2859 . <br /> 1665 Pacific Avenue' <br /> Stockton, California. <br /> Repart,•No. 240072:06• <br /> + INTRODUCTION <br /> .At the request of Unocal Coiporation (Unocal);Get#ler-Ryan'Inc. (GR) has prepared this Work Plan far ` <br /> additional subsurface assessment and remedial 'action for the'above referenced site: .The'purliose of,this <br /> r investigation is to further delineate the extent of dissolved petroleum hydrocarbons in groundwater in the _ - <br /> vicinity of the subject site, and.to install an-ozone microsparging remedial system. The proposed scope of <br /> work includes: obtaining the required-.well -installation,..and encroachment permits; installing two: <br /> groundwater monitoring wells; installing.eight. ozone 'microsparge a wells.,and supporting_ equipment;' { <br /> collecting soil samples from the monitoring wellaborings; developing'arid;sampling the monitoring wells; ` <br /> analyzing selected soil and groundwater samples; surveying the newly installed wells; and..preparing a'-: ; <br /> report presenting the findings'of the investigation. This work was requested.by the San Joaquin County - <br /> Public Health Services(SJCPHS) in a letter.dated October 29, 2001.. <br /> The scope of work described in this Work Plan°'is intended to;comply.with the=State of California Water, ' <br /> Resources Control Board'sLeakhig Underground_ ' Fuel '.Tanks::(LUFT) 'Manual "and California i <br /> Underground Storage Tank Regulations, 1994, the California Regional Water Quality .Control Board I <br /> (CRWQCB) Tri-Regional.Board Staff Recommendations for Preliminary 1hyestigation and Evaluation of <br /> Underground Tank Sites, and SJCPHS.guidelines; <br /> SITE DESCRIPTION. }Y _ <br /> ` The subject site is a vacantlot' situated.on the southwesi corner of Pacific and Walnut Avenues in <br /> Stockton, California (Figure:-1). 'Former-facilities at the site consisted of a:station'building, one 550' ` <br /> gallon waste oil underground storage tank'(UST),'fwo dispenser islands, and two 10,000 gallon gasoline.- <br /> USTs that shared a common pit near the center of the site."• Location's-of pertinent site features are shown <br /> on Figure 2. <br /> PREVIOUS ENVIRONMENTAL WORK <br /> Kleinfelder, Inc, drilled soil.borings KB 1 ;ihrough KB-S.,in,January ,1988 These borings were drillM <br /> f. around the tank complex,°adjacent to the,.product islands, and adjacent to the:waste oiltank. "The highest..'' <br /> concentration.of Total Petroleum Hydrocarbons'-as gasoline (TPHg) were detected in borings KB-3 and <br />` <br /> 6747 -Sierra Cou.rt ,. 'Su04' J. •. ,.D,.ub-I.i ``n ,.'' Cali.f-o..r`n' Ja'".94568 ( 92 5 ) 5.51 - 75'55 ,• <br /> to .. <br />