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Mr.Robert Gray Environmental 17 June 2014 Resources Page 3 Management before they were allowed to start work and/or enter the work area. ERM personnel, subcontractors, and site visitors observed PG&E's safety protocols for the site,which included a safety checklist to complete prior to starting work and a daily sign-in/sign-out log documenting all non- PG&E or Xterran workers present for each day of field work. Individuals were required to wear the proper personal protective equipment at all times while inside the work area. FIELD WORK AND OBSERVATIONS The field work involved collecting soil samples from prescribed depths at 19 locations. The Workplan allowed for selection of additional sampling locations based on site conditions observed by field personnel. It was decided to add one location in the north compressor station near the ethylene glycol aboveground storage tank enclosure,SB-13 on Figure 2. Soil samples were collected at 0.5 and 4.5 feet bgs at all boring locations, SB-1 through SB-19 (Figure 2). As outlined in the Workplan, seven of the 13 boring locations at the northern compressor station were also sampled at 10 feet bgs to characterize impacts to deeper soil; the northern station has been operational for 30 years compared to 6 years for the southern station, allowing more time for possible releases and migration of contaminants. For the other 11 locations, the Workplan called for 10-foot samples to be collected only if impacts were observed in the 4.5-to 5-foot samples. Based on visual, olfactory, and photoionization detector(PID) screening of the 4.5-to 5-foot samples, there was no evidence of impacts below 5 feet.Therefore,no additional 10-foot samples were collected other than those outlined in the Workplan. Prior to sample collection, sample depths were confirmed by measuring the depth of the borehole with a measuring tape. Samples were collected from the bottom of the hand auger bucket into 4-ounce,pre-cleaned, certified glass jars,and upon collection,immediately transferred into a cooler with ice. At approximately 2-foot intervals,soil was placed in Ziploc-type plastic bags for PID screening. After waiting a short time(from 2 to 5 minutes) to allow volatile constituents present in the sample to accumulate in the head space of the bag, a PID measurement was collected. The highest