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Ms Lori Duncan Page 4 of 7 Spectrum advanced boring MW1 to a total depth of 45 feet using a drill rig equipped with 8-inch diameter hollow stem augers Soil samples were collected at five-foot intervals with an 18-inch long core sampler lined with new 2-inch diameter brass sleeves, affording soil identification and subjective evaluation for contamination The soil was classified by traditional soil logging techniques using ASTM Designation D2488-90, which is equivalent to the Unified Soil Classification System A photo ionization detector (PID) was used to monitor for the presence of volatile organic compounds in the soil samples After collection, the sample selected for laboratory analysis was sealed, labeled, and immediately placed in an iced cooler and transported to Argon under chain of custody protocol Since no field indications of contamination were observed in any soil sample, only the sample collected from the capillary fringe was submitted for analysis Analysis consisted of volatile organic compounds (VOCs) and gasoline oxygenate additives by EPA Method 8260, and total petroleum hydrocarbons as gasoline (TPHg) by EPA Method 8015 Groundwater was first found in boring MW 1 a depth of approximately 33 feet bgs Subsequent measurements indicated that groundwater was rising Static depth to groundwater was measured at a depth of 29 feet bgs Soil cuttings and rinsate collected from decontamination procedures was contained in 55-gallon drums All down-hole drilling and sampling equipment was decontaminated by steam cleaning and/or washing with a laboratory grade detergent/water solution and thoroughly rinsing with clean water The soil and rinsate are currently stored on site pending proper disposal options 3.3 Well Construction Based on statigraphy, current depth to grOLindwater measurements and historical depth to groundwater measurements, well MW I was screened from 24 to 44 feet bgs The well was constructed of 2-inch diameter, Schedule 40 PVC casing and 0 020 inch slotted screen The filter pack consisted of#3 silica sand The annular seal contained 2 feet of bentonite overlain by neat cement grout to the ground surface Surface completion consisted of a traffic-rated well box and locking well cap A well construction log is included in Attachment A 3.4 Well Development and Groundwater Sampling On June 25, 2001, well MW 1 was developed and sampled Prior to well development, groundwater was measured in MW 1 at a depth of 31 60 feet below the top of the casing Subsequent to measuring initial depth to water, the new well was developed by surging and bailing until turbidity was minimized During the well development process, temperature, pH, and electrical conductivity were measured After parameter stabilization, water was allowed to recover prior to sampling After 100% water level recovery, groundwater samples were collected from the well and placed in an iced cooler for submittal to Argon under chain of custody protocol Analysis • consisted of VOCs and gasoline oxygenate additives by EPA Method 8260, TPHg by EPA Method 8015 and benzene, toluene, ethylbenzene and xylenes (BTEX) by EPA Method 8020 Field notes and a well development log are included in Attachment B d1L,tIgrounzeln';uttolrepart5lwellrepurl dog �