ARCHIVED REPORTS_XR0012697 - Laserfiche WebLink

Home Browse Search

s G' 1 3 SCOPE OF WORK Following is a detailed description o f _ �' the field the recent soil and ground-water characterization. These Procedures were conducted consistent with the approved work plan. The scope of work for this project included the following tasks: • drilling one exploratory soil boring • collecting and analyzing soil samples • installing a ground-water monitoring well ' developing and sampling the ground-water monitoring well • submitting selected soil samples and the ground-water sample for chemical analysis MI 3.1 Exploratory Sol l Boring On May 28, 1991, one exp;ora!o ry soil boring the center of the former excavation at the location shown on drilled i led through gu a 5. The soil boring was drilled using 8-Inch-diameter hollow-stem auger drilling k equipment. Soil samples were collected at 5-foot intervals ire advance of the auger bit with a modified California split-spoon sampler containing stainless steel liners. These samples were collected for geologic interpre- tation and chamical analysis. Representative soil samples from aarh sam- pling interval were sealed in stainless steel liners with Teflon® taps and plastic end caps, placed in zipoc bags, and stored on ice pending selec- tion for chemical analysis. Exploratory boring and well installation proce- ` 7 dures are presented in Appendix A, and the exploratory boring logs are presented in Appendix B. t The sampling equipment was cleaned between sampling events. The cleaning involved washing with a trisodium phosphate solution, followed by rinsing with tap water. } Soil samples were screened in the field b y performing visual, olfactory, and head-space analysis using a portable photoionizaton detector (PID). The vadose zone soil samples with the highest PID indication of contami- i` p19ti905t9a50101d 3 Rev.0 July 2, 9991 Ef lCon Associates