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's In Apnl 1996 we drilled two additional CPT bonngs (HP-3 and HP-5) They were reported in our ' report dated June 10, 1996 In July 1999, we drilled an additional monitoring well (BM-12) and a vapor boring to 80 feet, which ' was completed for a vapor extraction well, (VW-7) They were reported in our report dated August 5, 1999 i In December 2000, we drilled one additional monitoring well (BM-13) which was placed near (BM- 8) so that the slotted casing would be located at a shallower level than (BM-8) ' GEOLOGY ' The first 19 to 22 feet consist of fine grained soil of silty clay and clayey silt This soil unit appears consistent over the area Below the fine grained unit is a layer of silty sand, which is about 3 to 5 feet thick and is narrowing down on both ends of the investigation site Below this silty sand is a ' silty clay unit about 23 feet thick to the west and 25 feet thick to the east Below the silty clay is a silty sand about 20 feet thick and disappears when we reach (BM-12) Below this silty sand is a clay unit of unknown depth See the cross-sections attached IWells (BM-1, BM-2 and BM-3) were drilled to a depth of 50 feet Well (BM-1) had contamination from top to bottom and wells (BM-2 and BM-3) did not have any soil contamination In April 1992 we drilled three additional wells to replace the first three, because the water table had fallen below I the bottom of the existing wells The three wells were drilled to a depth of 65 feet These wells are labeled (BM-4, BM-5 and BM-6) Wells (BM-4 and BM-5) were contaminated from 15 feet below the surface (bgs) to 50 feet and probably deeper Well (BM-6) did not contain any gasoline contamination except at 15 feet where xylene was present at 1227 ug/Kg -'�r6- e.11-k Nj /' /'k, In July and August 1993 we placed two monitoring wells and one boring Wells (BM-7 and BM-8) I rc had minor contamination of gasoline from 35 to 50 feet bgs Boring B-1 had contaminated soil from top to bottom In September 1994 we placed three additional wells (BM-9, BM-10 and BM-11) Well (BM-9) was placed dust west of the station Well (BM-10) is near the comer of Clay Street and Grand Street and (BM-11) is one block east of this property on Aurora Street Well (BM-9) had contamination at 50 feet and BM-10 and BM-11 did not contain any sod contamination C w?jlPxntc��,(�,�s�ra T__K) IOn June 19 and 26, 1995, two hydropunch bonngs werednlled on the Sun Gardens property HP- O was drilled on the north side of the Sun Gardens Restaurant about 102 feet north of the curb of Charter Way Boring HP-2 was drilled 10 feet east and 60 feet north of the curb of Charter Way HP-1 had the water sample taken from 45 to 50 feet bgs, it had 85 ug/L of Toluene, 6 ug/L of Ethyl-benzene and 0 7 ug/L of TPH IHP-2 contained 6930 ug/L of Benzene, 63 ug/L of Toluene, 1120 ug/L of Ethyl-benzene, 183 ug/L of Xylene and 12,000 ug/L of TPH We attempted to obtain a water sample from HP-2 above 50 feet, but were not able to do so because the boring did not contain any water On June 26th we attempted to obtain a water sample by deepening HP-2 and we encountered water at 55 to 60 feet . deep bgs and obtained a water sample These two borings will supply an understanding of what is ` occurring at this site 4