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07 October 2013 <br /> AGE Project No. 13-2914 <br /> Page 2 of 5 <br /> SOIL SAMPLING <br /> On 18 September 2013, AGE advanced four soil borings (B1 through 134) at the site. <br /> Borings B1 and B2 were advanced inside the dry cleaning facility in the location of the <br /> former solvent machine (B1) and cracked concrete floor(132) identified during the Phase I <br /> Site Assessment for collection of soil and soil-vapor samples. Boring B3 was advanced in <br /> the hazardous waste storage area and B4 was advanced outside of Suite 220, in the back <br /> of the facility in the presumed solvent loading/unloading area. Borings 131 and B3 were <br /> advanced to five feet below surface grade (bsg); boring B2 was advanced to four feet bsg; <br /> and boring B4 was advanced to three feet bsg. Borings B2 and B4 encountered refusal at <br /> the total depths of the borings. Soil boring locations are illustrated in Figure 1. <br /> Soil borings B1 through B4 were advanced utilizing a two-inch diameter hand auger. Soil <br /> samples were collected at 1 foot bsg in borings B1 through B4 and at 5 feet bsg in borings <br /> 131 and 133; at four feet bsg in 132; and at three feet bsg in boring B4. Soil samples were <br /> hand-packed into two-inch by three-inch stainless steel sample sleeves. Sample sleeves <br /> were labeled with soil boring location, depth, time, date and sampler's initials and then <br /> placed in a chilled container. <br /> Soil sample duplicates were extruded into plastic bags and field-screened for the presence <br /> of organic vapors using an organic vapor meter (OVM), equipped with a photo-ionization <br /> detector(PID). Additionally, the soil was visually classified in accordance with the Unified <br /> Soil Classification System (USCS). PID readings and soil classifications were recorded on <br /> boring logs, provided in Appendix A. <br /> SOIL-VAPOR SAMPLING <br /> Soil-vapor samples were collected at three feet bsg from borings B1 and B2. For collection <br /> of soil vapor samples, a small diameter steel probe sampler with a disposable screened <br /> vapor point was driven into the subsurface with a mechanical hand-held hammer <br /> (rotohammer). The sampling point was advanced to a depth of 3.0 feet bsg in borings 131 <br /> and B2. Single use, 1/4-inch disposable polyethylene tubing was attached through the rods <br /> to the sampling point. Once the vapor point was advanced to three feet bsg the rods were <br /> retracted leaving the vapor point in place. The borehole was then filled with #2 Lonestar <br /> sand to one foot bsg and hydrated granular bentonite to the surface to ensure a vacuum- <br /> tight seal. Each sampling point was purged for approximately one minute (three well <br /> volumes) prior to obtaining a sample in 1 liter tedlar bags. Once the purging was complete <br /> a sample was collected using a peristaltic pump calibrated to 200 milliliters per minute. <br /> After sample collection the tedlar bag were labeled and stored in a dry container. <br /> Approximately 120 minutes equilibrium time was allowed at each soil-vapor boring location <br /> Advanced CeoEnvironmental,Inc. <br />