SR0083102 (2) - Laserfiche WebLink

Home Browse Search

i 22 December 2020 AdvancedGeo Project No. 20-6264 An Empfoyee•OwneACompony Page 2of6 M,.NM • A report of findings will be prepared documenting the results of the investigation. The proposed boring locations are illustrated in Figure 1. Each of these tasks are described in greater detail below. 2.1. PERMITTING AND PRE-FIELD WORK ACTIVITIES Applicable site assessment drilling permits will be obtained from the EHD. Also, a site- specific Health and Safety Plan will be prepared. Prior to mobilization, each soil probe boring location will be clearly marked, and a utility clearance obtained through Underground Service Alert. The EHD will be contacted at least 48 hours prior to conducting investigation activities to arrange for inspection. 2.2. SOIL BORING AND SAMPLING Soil borings B1, B2 and B3 through B6 will be advanced to total depths of 5 (B1), 10 (62) and 15 (133 through 136) bsg for collection of soil samples; boring B7 will be advanced to a depth of 25 feet bsg for collection of soil and a grab groundwater sample. Borings B2 through B7 will be advanced utilizing a direct push drilling rig. During boring advancement discrete soil samples will be collected at five-foot intervals based on proposed targeted sampling depths; the initial five-foot sample will be hand packed from the hand auger during utility clearance, while the remainder of the borings will be advanced using a direct push drilling rig. A soil sample will be collected from boring B1 at five feet bsg by hand packing a soil sample from the hand auger. Procedures for advancement of soil borings and soil/groundwater sampling are presented in Section 3.0. 2.3. SOIL AND GROUNDWATER LABORATORY ANALYSIS Selected soil and groundwater samples will be analyzed by a California Environmental Laboratory Accreditation Program (ELAP)-certified laboratory for the following constituents: • Total petroleum hydrocarbons quantified as gasoline, diesel, motor oil and hydraulic oil (TPH-g, -d, -mo and -ho) in accordance with EPA Method 8015M. • Volatile organic compounds (VOCs) including fuel oxygenated compounds (MTBE, DIPE, TAME, ETBE and TBA), naphthalene, ethylene dibromide (EDB) and 1,2-dichloroethane (1,2-DCA) in accordance with EPA Method 8260B.