1600 MADISON ST 2016-01-01 MF Import

� � L� � � V � � Mr. Chris Lark February 20, 2001 higli rockery will be constructed along Beverly Boulevard to provide grade separation with the completed facility. This grading may result in a net expoR of material fiom the site. 3.0 SUBSURTACE EXPLORATIONS Subsurface conditions at the site were evaluated based on the results of existing borings that were previously dril(ed at the site in conjunction with an environmental investigation ofpotential contaminanis that may have been releascl from existing underground fuel storage tanks (UST's). This existing data was supplemenled with geotechnical and environmental borings and laboratory tests performed specifically for the design of the new fire �tation. The following summ�uizes the procedures u�ed to advance the borings of our current study and previous studies at tl�e site. 3.1 CURRENTEXPLORATfONS The field exploration program for the replacement f re station consisted of driLing seven borings (BH-1 through BH-7) at the site at the approximate locations indicated on Pigure 2. The borings were drilled to depths runging from 6 feet to as much as 60 `eet below thc existing ground surface. Groundwater monitoring wells were installecl in the two dcepest borings, b�rings B!-I-6 and BH-7, which were drilled lo deplhs of 50 and 60 fect, respectively, below U�e existing ground surface. These borings were advanced to this relatively deep depth to provide informatio;i that would be used by G-Logics to investigate :he potential presence and/or migration of contaminants at lhe former location of mi UST. The drilling, which was completed on October 23 and 24, 2000, was conducted by Cascadc Drilling of Woodinvillc, Washington, under a subconU�act to G-Logics. Personnel from PanGEO and G-Logics were present throughout the ficld exploralion program to observe the borings, assist in sampling, and to prepare descriptive logs of the explorations. The methods of exploration and summary logs of tUese Uorings are included in Appendix A. 3.� LA130RATORY TESTING Soil samples obtained &om Uie explorations were classified in the field and representative portiuns �vere placed in airtight plastic bags and retumed to our office for laboratory lesting. Laboratory tests performed on selected samples included natural moisture content determinations (ASTM D 2216) and grain size distributions (ASTM D 427.). Tl�e laboratory tests were conducted Uy ROSA Environmental anfl Geotcchnical Laboratory of Seattle, Washington, under a subcontract to PanGEO. The tests were performed in general accordance with tl�e procedures ouUined in ASTM. The moisture content test results are indicated on the summary boring logs in Appendix A, and the grain size distribution test results are included in Appendix B. 39 � 00-046-100 Geotech Report 2 YanGEO, Inc. ,