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Conclusions from CPT Installation and Sample Analysis As of March of 2001, only CPT#3 and CPT#6 are within the contamination plume. This would indicate that the northerly movement of the contamination plume lies within the southerly 100' of . the Highway 4 RIW and extends at least 200' from the former UST location. The high permeability of the sand aquifer at about fifty feet bsg. has a large influence on the extent of the plume to the Northeast. REPORT ON THE INSTALLATION OF MW#7S, MW#8S, AND MW#8D Procedure All of the monitoring wells were installed by Spectrum Exploration under the December 2000 Work Plan. All were single wells installed in an eight-inch soil bores. Each of these monitoring wells had a two-inch PVC casing with .010 screen slots and a#2 x #16 sand filter. Locked caps were placed on all casings and each well had a flush mounted monument. Soil bores were made with a standard eight inch hollow stem auger. Soil samples were extracted with a split spoon sampler in BX sleeves at five feet intervals beginning at a depth of 20 feet bsg. and ending at termination. Each sleeve end was covered with a Teflon sheet and capped with a standard plastic cap.Each cap was sealed with duct tape. Sealed sleeves were transported on ice under a chain of custody to Sherwood Labs for analysis. The monitoring wells were developed using standard practices of the industry by Spectrum Exploration. Findings The soil bore for monitoring well MW47S, located in the Southeast corner of the site, was non- detect for all compounds to 65 feet of depth. This soil bore indicated a very permeable aquifer between 50 and 65 feet of depth, as does most of the other soil bores of this project. The soil samples from the soil bore for MW#8S and MW#81)produced positive analysis for BTEX and TPHg in the sand strata at 35 and 70 feet of depth. This set of monitoring wells is located between the two building directly east of the project and about 135 feet from the former UST location. MW#9 is located on the East edge of the UST excavation and was installed to a depth of 115 feet. All of the soil samples from this soil bore were positive for BTEX and all the soil samples above 80 feet of depth were positive for TPHg. Conclusions It appears that the vadose zone contamination is limited to areas within 50 feet of the center of the UST excavation. The saturated zones are contaminated at least 200'to the Northeast from the center of the UST excavation. The down groundwater gradient monitoring wells and CPT's indicate that water soluble contamination movement is most active in the very permeable sand aquifer that is between 50 and 75 feet of depth. 3