FIELD DOCUMENTS - Laserfiche WebLink

Home Browse Search

!4 E� 1� 2.0 FIELD INVESTIGATION 2.1 PRELIMINARY ACTIVITIES h F Prior to field activities,soil boring permits and workplan approval were obtained from SJCEHD and Reclamation District 2044(RD2044(see Appendix A). SECOR also compiled a site-specific Health and Safety Plan(HASP) in accordance with 29CFR1910.120 to address the scope of work. Soil boring locations including areas suspected of having USTs or underground piping were cleared using n professional utility location company and Underground.Services Alert(USA) was notified 72-hours prior to drilling. 2.2 SOIL AND GROUNDWATER INVESTIGATION ' Two rounds of soil and groundwater sampling were conducted at the site.The first round was conducted between January 23 and 25, 1996.The second round was conducted to further characterize areas of concern from February 8,through 13, 1996. SECOR's January and February work--plan's included soil borings with grab groundwater samples on the Intrepid portion of the Holiday harbor facility. The results of that portion of the investigation will be provided in a j tseparate report issued by the property owner, 2.2.1 Soil Sampling and Analysis Exploratory borings at the King Island facility included boreholes SB 1,SB2,SB5,SB21,SB22,SB23,and SB24 I which were drilled using a truck-mounted drill rig equipped with 8-inch and 10-inch diameter hollow-stem augers. At the Holiday Harbor facility,boreholes SB3,SB4,SB6,and SB7,were also advanced using hollow- stem augers. During borehole advancement, relatively undisturbed soil samples were collected continuously beginning at the surface to the total depth of each boring for lithologic description and possible chemical analysis. Soil samples were collected by driving an 18-inch long modified California split-spoon sampler lined with three 6-inch long brass sample tubes. Borings SB 14,SB 15,SB 16,S1325,SB26,and SB27 were also advanced at the King Island Facility using a 3- inch hand auger. Samples were collected using a 2-inch diameter drive sampler lined with clean 2-inch by 6-inch brass tubes. The sampler was driven into each boring to the desired sample depth and the brass tube was extracted from the sampler. IF The soils encountered during drilling were described by a SECOR geologist using the Unified Soil Classification System (US CS). Select tubes were retained from the unsaturated zone and field screened for the presence of ' volatile organic compounds(VOCs)using a photo-ionizing detector(PID). The VOC readings obtained during field screening of the samples and the USCS classifications of the encountered soil types are presented on the boring logs included as Appendix A. Upon retrieval of the soil sample tubes,the open ends of select tubes were covered with Teflon and fitted with plastic end caps to minimize potential loss of moisture and volatilelI.constituents. Each sample tube retained for IS I:I s�s 13 >Lk�i—\Jin1Akih1ui.rM 4 50133-001.02 t�