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yrs Va: - � _ • 52 Y _ 5 15 June 1:999 `' AGE-NC-Project No. �. Page 2 of 13 _ On 21 and 23 December 1998,one-20000-gal Ion diesel UST, two'10,00Q=gallon diesel USTs;one 20,000-gallon' gasoline:UST; three '_10,000-gallon gasoline USTs and one 1,000-gallon waste oil }i UST were removed-from-the site by Dan Samuels.-Construction:,The approximate,locations of the. i former USTs,product piing and dispensers are shown of Figure`2: ., :u tt: .•r. - _ - -.-_. .., �� fir' 'E � ~# - -Y - �` � .._ .�,� ` �"`� 1 The_former 20,000_gallon diesel UST (Tank-1) was'located.east of the f6rmer-two10,000-gallon~T diesel-USTs {Tanks 2 and 3), at the south east corner of the,iWo common"UST excavations..The` ' former 20,000-gallon,.gasbline -UST (Tank) was located east of the three.10,000-gallon gasoline USTs (Tanks 5, 6 and 7)"and the 1,000-gallon w/o UST(Tank 8),was.located at the;wesfem edge , of the.-,site:The former fuel dispensers were located at the southernmend of the site along'the entrance. to the site'on Navy Drive Following removal of the USTs and collection of soil samples, the excavations were backfilled to - surface.grade with clean fill material.. - - During the UST removal activities,representatives of AGE=collecfed a-total of forty-twosoil samples a ` from beneath.the USTs;pioduct'lines-and dispenser area. Soil samples were collected from beneath- -the eneath-the ends of'each UST and soil sample .were also 'collected from the center;portion of the,,:'-".. 20,000=gallon.USTs: Three soil''sarnples`.were collected bezieathnthe fuel dispenser::.A total of . . t ._ fourteen soil samples wereRcollected from the product line trench,approximately,one soil sample for every twenty linear feet of-product linea In addition,-'eighteen-soil.samples.were collected from the stockpiled soil: • , 9 ' The soil samples were.transported under chain-of-custody to McCainbell Analytical .Laboratories, Inc. .(MAI)•a State of-Califoriia Department.of.Health-Services (DHS)-certifiedlaboratory in Pacheco, California, and selected soil samples were analyzed for-the following:7. . = -. .. Y. .. - -- _ �.. _ - - 3. ♦ '. -Total Petroleum hydrocarbons q_uantified as.diesel (TPH=d),total petroleum hydrocarbons quantified as gasoline {TPH-g) in accordance with-EPA method 8015 modified;.. . ' Purgeable aroniatic'hydrocazbons(benzene,toluene,ethyl>;enzerie and total xylenes.[BTEX]) .' f -accordance with EPA method 8020_ and' �'r".-u- _ - •. - � . . '.t.' r 4t � -`�� ' of ^� r - ,. c L _S -F +a Fuel oxygenates including methyl tert=bu 1 ether MTBE ;testi -butyl alcohol (T-BA),di- yg g y tY ( ) ary- ty { ) :-= isopropyl ether (DIPE)' ethyl tertiary-butyl.ether(ETBE) and°tertiary-amy1!!nethyl.ether• _ (TAME) in accordance with EPA Method;8260 modified =' _ A summary of soil analytical.results-ar6 presented �n Tables 1 and 2: ' - Also under'direction from-the PHS-EHD four, grab' ground water sample were collected from the- UST he UST excavations for Tanks 1, 4, 5 and 6.-The'water sample from Tank 1 and 4 were analyzed for Y r _ .� . _ r _ ... ,.. Advanced GeoEnvironmental,Inc.