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r r � monitor the vertical extent of contamination at that location The other monitoring well to be drilled near monitoring well MW-1 with the primary purpose of providing a non-linear point to determine the groundwater flow direction in the 55 to 70-foot zone This well rwill also allow for the monitoring of the vertical extent of groundwater contamination at that location (Figure 3) r4 ) Drill three soil borings to a depth of 19-feet bgs in West Yosemite Avenue north of the site, and install groundwater monitoring wells rin these boring (Figure 3) 5 ) Drill five soil borings in the vicinity of the USTs and dispensers, a n d rinstall piezometers in these borings to further define the extent of the free-floating hydrocarbons present in monitoring well MW-5 r6 ) Analyze one (1) capillary zone soil sample from each boring described in tasks 4 and 5 at a CALrEPA certified analytical r laboratory for TPH-D by modified EPA Method 3550/8015, and TPH-G, benzene, toluene, ethylbenzene and total xylenes (collectively known as BTEX), halogenated volatile organic compounds (HVOCs), fuel oxygenates including MTBE, TBA, TAME, DIPE and ETBE, and the alcohols ethanol and methanol by EPA r Method 8260 i 7 ) Develop each monitoring well and piezometer i r $ ) Collect groundwater samples from each monitoring well for analyses r9 ) Analyze the groundwater samples at a CAUEPA certified environmental laboratory for TPH-D by modified EPA Method 3550/8015, and TPH-G, BTEX, HVOCs, fuel oxygenates including j MTBE, TBA, TAME, D1PE and ETRE, and the alcohols ethanol and rmethanol by EPA Method 8260 10) Survey the top of casing elevation of each well and piezometer, a n d determine the groundwater flow direction and gradient beneath the site in both the shallow and 55 to 70-foot bgs zones I 11 Prepare a report detailing the methods and findings of the soil and groundwater assessment j I I Franks One Stop Report - May 2000 -6-