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Soil UQring and Samvlipff One boil boring (B-16) was installed near previous soil boring B-15 as shown in Figure 2-1. The boring was installed with a mobile truck mounted drill rig using hollow stem augers. The soils from the boring were not logged because the boring was only 18 inches from boring B-15 which was already logged by WGR (See WGR boring log for B-15 in Appendix A). The boring was advanced to 25 feet below the ground surface. A soil sample (HP-1 Soil) was then collected from the depth interval of 25.5 feet to 26.0 feet. In addition, a groundwater sample was collected from the boring using a HydroPunch0 1000 (See section "HydroPunch0 Sample Collection"). The soil sam,Ae was taken with a California modified split-spoon sampler fitted with brass tube liners. All brass liners were steam cleaned prior to use. All augers, bits, and split spoon samplers were steam cleaned prior to initiating drilling activities. The soil sample was collected by inserting the sampler into the augers and hammering it into the soil 'rom a depth of 25.0 feet to 26.5 feet falow the n•ound surface. Tl_.: sampler was then removed from the augers and the center brass liner%-ontaining the sample interval of 25.5 to 26 feet was removed from the sampler. The tube containing the soil sample was covered with Teflon tape and capped with plastic ceps to make airtight seals. The brass tube was then labeled with the boring number, sample interval depth, sampler's initials, date, time, location, and analysis required. '1 he sample was logged on a chain- of-custody form and in a field book. (See completed Chain-of-Custody form in Appendix B.) The sample was then relinquished to an on- site mobile laboratory along with the completed chain-of-custody form for immediate extraction. �®-gym ll A groundwater sample (HP-1 Water) was collected from the soil boring using a HydroPunchQ 1000. The HydroPunchO method allows the sampling of groundwater without the necessity of well installation. The HydroPunchW employs a probe made of 2" steel pipe equipped with a detachable penetration cone. The probe was driven into the formation material in advance of the ho)low stem augers. The probe was then retracted from the detachable penetration cone to expose a screen in the potential water bearing zone. A water sample was then collected with a TeflonO bailer which was introduced into the probe. 2-2