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C3eo6,gwa1Technws Inc 0 0 Page 2 Monitoring Well Installation Work Plan J M Equipment Co Project No 507 2 January 17, 1997 iPrior to the early 1970's Crandle operated a John Deere facility on this property In the early 1970's Quimby purchased the property from Crandle and operated J M Equipment which is an equipment sales and service business In 1991 the property was transferred from Quimby to Geo Corp Apparently the tanks were installed during the time Quimby operated a John Deer facility and J M Equipment continued to operate them until they were removed 2.0 PROPOSED INVESTIGATION To further investigate the lateral extent of soil and ground water impacted with gasoline and diesel range petroleum hydrocarbons, Geological Technics Inc proposes to install two monitoring wells to a depth of zE30 to 35 feet below grade, to be named JM-1 and JM-2 JM- 1 will be located immediately west of the ramp, while JM-2 will be located on the northeast portion of the property The use of*'JM" to name the wells is being used to avoid confusion with an existing well, MW-9, that was drilled on site for the investigation of the Independent Trucking facility, a neighboring contaminated site to the east Refer to Figure 2 Site Map for well locations After this information is gathered and a better understanding of the site has been gained, the data will be evaluated and recommendations will be made for future work that may be needed to define the lateral and vertical extent of the soil and groundwater impacted zone 2.1 Monitoring Well Installation In an effort to define the lateral extent of petroleum hydrocarbons beneath the site, we propose to advance two monitoring wells to approximately 30 to 35 feet below grade The well bonngs will be drilled using a 8 inch outside diameter continuous flight hollow stem auger owned and operated by V&W Drilling (C57# 720904) The expected depth to ground water is approximately 20 feet below ground surface, based on data from the Independent Trucking site on the adjoining property to the east From this same data it is expected that ground water flow is to the northeast Monitoring well permits will be secured as necessary and the local regulatory agency will be notified 48 hours prior to commencing work The subsurface will be cleared of underground utilities by notifying Underground Service Alert 2.1.1 Soil Sampling Procedure Soil samples will be collected for geological and analytical evaluation at five foot intervals _ A boring log providing sediment description using the U S C S and field observations will be maintained by a geologist working under the supervision of a registered geologist Soil samples will be collected in 6 0 inch brass liners using a 2 0 inch modified California split spoon sampler All soil samples will be sealed with Teflon, capped with Teflon end caps, labeled and placed in a cooler at 4° Celsius for transport to the laboratory following Chain of Custody protocol Because every soil sample collected will not be submitted for laboratory analysis, a screening process will be used to gather additional information through field observation noting sediment type, especially grain size and clay content. moisture content, visible evidence of contamination, i e , color change due to reduction of iron or discoloration from hydrocarbons