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rl.••--..:5...o,_��S'T�nx}S a a4_ttL.i.L.s r a -v + � _�,«.....,.,. _ ..��—u �..i.. _ .. r _ _.. .._ � .. .. �,—.( .� r _ ` Corrective Action Plan SIERRA LUMBER ' 375 West Hazelton Avenue, Stockton, California ' 1.0. INTRODUCTION AND SCOPE OF WORK ' In accordance with the request of Mr Bob Long of Sierra Lumber,Advanced GeoEnvironmental, Inc (AGE),has prepared this Corrective Action Plan Report(CAP) for 375 West Hazelton Avenue, Stockton, California The location of the site is illustrated in Figure 1 A plan of the site is illustrated ' in Figure 2 The scope of the work for this CAP is to evaluate the feasibility and costs of several remedial action ' alternatives for hydrocarbon-impacted soil and ground water at the site The CAP was prepared in accordance with guidelines established by the San Joaquin County Public Health Services - Environmental Health Division (PHS-EHD) and by the Central Valley Regional Water Quality ' Control Board (CVRWQCB) for investigation of underground storage tank (UST) sites 2.0. BACKGROUND The property is currently occupied by a lumber manufacturing facility The facility consists of several warehouse buildings used for the manufacture and storage of lumber Soil and ground water on the site has been found to be impacted by petroleum hydrocarbons as the result of an unauthorized release from a UST formerly located on the site Ground water monitoring well locations are depicted in Figure 2 ' 2 1 SITE LOCATION AND DESCRIPTION ' The site area is located approximately 500 feet west of Scott Street between Van Buren Street and Monroe Street in a topographically flat area of Stockton, California (Figure 1) The site is described as being located in the southeast quarter of Section 8, Township I North, Range 6 East, Mount ' Diablo Base and Meridian(Stockton West Quadrangle,7 5-Minute USGS Topographic Series, 1968, photo revised 1987) _ S 1 2 2 UNDERGROUND STORAGE TANK REMOVAL ' In August 1988, one 1,000-gallon gasoline UST was removed from inside the northeast warehouse at the site (See Figure 2) Upon removal of the UST, two soil samples were collected from the floor of the excavation The first soil sample(UST-1) was collected from a depth of 9 feet below surface grade (bsg), the second soil sample (UST-2) was collected from a depth of 15 feet bsg Total petroleum hydrocarbons quantified as gasoline (TPH-g) were detected in UST-1 and UST-2 at concentrations of 790 milligrams per kilogram (mg/kg) and 1,200 mg/kg, respectively (Report on Advanced GecEnvironmental,Inc