Laserfiche WebLink
Ground Zero Analysis,Inc. <br /> LPage 2 <br /> Summary of Findings:Soil Investigation <br /> Project#2010.2 <br /> L <br /> June 26,2013 <br /> Street. The soil borings were drilled by the hollow-stem auger method using a 8-inch diameter <br /> auger. The total depth of boreholes are as follows: <br /> + B-1 to a total depth of 36 feet bgs <br /> • <br /> 13-2 to a total depth of 39 feet bgs <br /> • B-3 to a total depth of 36 feet bgs <br /> See Figure 2 for borehole locations. See Figures 4, 5 and 6 for the borelogs for borings B-1, B-2 <br /> and B-3, respectively <br /> Each of the boreholes were abandoned from basal depth to the surface with a neat cement grout <br /> (augmented with --5% bentonite). <br /> 2.2 , Soil Sampling Procedure <br /> Soil samples were obtained by the continuous core method from ground surface. Boring logs <br /> providing sediment description using the Uniform Soil Classification System (USCS) and field <br /> observations were completed by geologist Andrew Dorn under the supervision of Dr. Ray <br /> Kablanow, a California Professional Geologist and Certified Hydrogeologist. <br /> The soil of the upper 30 feet of boring was logged using a 5-foot split continuous core. The <br /> remaining depth and all soil samples were collected in 18-inch intervals using an 18-inch split- <br /> spoon sampler. Two soil samples for laboratory analysis were collected from each borehole: <br /> 1. At the base of the sand unit (31' to 35.5' bgs), at the contact between the sand and clay <br /> unit below <br /> 2. At the top of the clay unit (34.5' to 36.5' bgs), at the contact between the clay and the <br /> sand unit above <br /> Sample tubes were capped with Teflon tape and plastic end caps, labeled and placed into an ice <br /> chest with ice for transport to the laboratory following Chain of Custody protocol. <br /> The following information was noted during borehole logging: <br /> Sediment type, including: grain size, clay content and color <br /> • Sediment origin: native or fill <br /> • Moisture content <br /> • Visible evidence of contamination, i.e., color change due to reduction of iron or <br /> discoloration from hydrocarbons and other pollutants <br /> .2.3 Soil Laboratory Analyses <br /> Two (2) soil samples from each soil boring were delivered to BC Laboratories of Bakersfield, <br /> California(ELAP#1186), for the following analyses: <br /> • Complete VOC Scan, including Total Petroleum Hydrocarbons as Gasoline (TPH-G) by <br /> EPA method 8260 <br /> L <br /> L <br />