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Alk 20 April 1999 AGE-NC Project No:'98 0521 k Page 2`of 4 ' 6 r �On-21 December the USTs .were_ triple�4nnsed by AGE, using a pressure washer and an alconox solution. The liquid contents of the US1"s were removed:Approximately 600 gallons-of rinseate �-were transported under manifest:to Industrial.Services Qil :Company in,Los:Angles,.California-- (State Manifest Document No.:98522785) bynNorcal.Oil of.Turlock, Ca'liforiiia." The tanks were then .monitored for level of explosivelimit (LEL) and percent .oxygen. r.. . � . ApproxiiriateIy 300 pounds'of dry ice`for'were`added 'to each`gasoline '.UST. 'T,he LEL_and. M_oxygen,level'were again measured and reported to the PHS-EHD ' s t The UUSTs were.agam nnsed.on_24 March 1999 Approximately 200 gallons of.rinseate were '- 'transported under manifest'to Industrial. Services Oil.Company in Los Angles; California.(State' Manifest Document' No:-987764i 1)by 14or8al Oil of Turlock;:California.At n - An inspector from"the City:of Stockton Fire Department was on site'.to oversee the tank removal. ;activities. Due: to,limita'tions=of the exc"avator used-to excavate tl e:USTs, a mobile-crane was moused to; lift the-USTs onto waiting transportation .vehicles to _be-delivered-for treatment and.,.. .disposal.,-The tanks were rsub§e uentl'�-'trans ported:.-to- West Coast Equipment '�Com an of q Y pComoan Turlockfor disposal.'L 'After being removed, the tanks were-visually:inspected'and appeared to be intact;:with iio holes or extensive corrosion noted:- - • w g c - y _ SOIL SAMPLING - - Following,removal:of the tanks,San'excavator'-was -used to collect sox soil'samples fxomM2 feet.. below the .ends of the.formUSTs (Figure_:2): Ground water was ericountered:in each of.the UST inverts or tank bottom impression 'The•UST'code.requires.-that a.`:grab` water-sample:be collecte&from.each•tank'excavation with water: Therefore:three'separate ground 'water samples - = were .required. The:three_were collected -andanalyzed.-'as, part-.''of the. minimum an_alytical :'verification.:'verification. :The samples-•.were-collected in_A0-milliliter: volatile .organicanalysis (VOA) =containers and brie-liter amber-bottles and/orr plastic containers At the -request of the`PHS-EHD, a total of ten soil samples were collected from the two soil r ,stockpiles., Each;soil_sample was-collecte&with:a-metnc`soil sampling hammer, loaded with a r_ "pre-cleaned brass sie'eve T-he ends of the'-soil-filled brass .sleeves'were covered with a Teflon plastic and:ptastic end :caps were tapped over the ends.of e' ac 'sample sleeve to preserve the samples:..: _ 1•• _S O Y_ _ "� � TN - p