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` 16 February .1W999' = :c AGE NC'Project No._98-0534 Page 2 product inventory and repairs are not known to AGE. Qn 21`and.23 Decernber'1998,one 20,000-gallon diesel UST;tvvo 10,000-gallon-diesel•USTs,one _ 20,000-gallon gasoline UST,three 4vm6j0,000-gallon gasoline'USTs and one '1,600' llon waste oil (w/o)UST were removed from ifie site by Dan Samuels.Construction. The approximate locations' i of the former USTs,-product piping and dispensers are shown of Figure 2. The former 20,000-gallon diesel.UST (Tank 1) was located east of-the former'-two 10;0M-gaIloh .'. diesel USTs (Tanks 2 and.3), at::the south east coiner_of the two comrhon UST:excavations: The_', former 20,000-gallon gasoline��UST{Tank) was Iocated east-of the three .10,000-gallon gasoline` USTs.(,Tanks 5, 6 and 7),and-the 1;000-gallon w/o US°T(Tank 8) was.lacated at the western`edge of the site.The former fuel.'dispensers�were'located''at the southern end of the site along''the entrance'.. to the. site-ori Navy Drive. Following removal'of the`USTs:,and collection of-soil.-samples the excavations were backfilled to surfacegrade with clean fill mate-al.. . .v f During tlie-UST removal activities;representatives of AGE collected`a total;of fortyawo soil samples 5 from beneath the:USTs,product lines and dispenser area:.Soil samples were :collected front beneath--i: the ends of each- UST and soil- sample :were also':collected -from >the ces ter,`portion'of. the dx 20,000-gallon. USTs. Three soil`samples .were:collected .beneath the-fuel dispenser:' A total. of - - fourteen soil samples We h,from the product line trench,approximately._oi a-soil sample for x .: n addition, eighteen sbil-samples ivere lected every twenty linear feet of product_lirie 'Icol -from.the ' stockpiled soil. The soil.sainples were,transported und6fchain�of-custody to 1VIcCampbell Analytical Laboratories;': a Y Inc. (MAI) a State of California`Department ofHealth,Services (DHS)-certified laboratory in :. Pacheco, California, and selected:soil samples were analyzed for the following • Total petroleum hydrocarbons duantif ed as diesel (_-PH-d), total petroleum hydrocarbons quantified as gasoline.(TPH=g) ri accordance with EPA method 8015 modified •,' Purgeable aromatic hydrocarbons(benzene,toluene,ethylbenzene and total,xylene_s,[BTEXj) in accordance with,EPA method 8020 and- '-' u r - •, FueI oxygenates iricludm meth' 1 terttbu y 1 ether_ MTBE tert� -bu l alcohol TBA di- Fuel Yg g Y tY ( )s a?y t ' ( )� 'isopropyl ether'(DIPE), ethyl tertiary-.butyl ether (ETBE) and.tertiary-arimyl.methyl ether (TAME) in accordance with EPA.Method $260 modified; A surrim, of soil anal ~£ , ` ary analytic are presented in Tables-1 and 2. . - Also under direction from the PHS'-EHD four `grabgroundwater sample:were collected from the • UST excavations for.Tanks 1",-4, 5;and.6:.The'water sample_from Tank 1 and were-analyzed for ~ l Advanced GsoEnv�ronmental lnc..;