FIELD DOCUMENTS - Laserfiche WebLink

Home Browse Search

Ms. Marilyn Petruescu September 30, 2024 • Advance three confirmation borings near the historical boring locations in the vicinity of the UST excavation to evaluate the current concentrations of petroleum hydrocarbons in soil with respect to the historical data. • Prepare a Site Investigation Summary and Well Installation Report. Pre-field activities, field activities, and reporting associated with the proposed scope of work are described in the following sections. Pre-Field Activities Prior to site investigation activities, underground utility clearance and permitting will be conducted as described in the below sections. Health and Safety The Site-Specific Health and Safety Plan (HASP) outlining general health and safety procedures followed at the Site and will be reviewed by Arcadis field staff and the subcontractor's field staff prior to beginning field activities. General and well installation health and safety procedures will be followed during field activities as outlined in the HASP. Utility Clearance In accordance with state law, Underground Service Alert (USA)will be notified of the intent to conduct subsurface investigations at least 48 hours prior to initiation of intrusive field tasks. The proposed well and boring locations will be clearly marked with white paint as required by USA. Then, USA will notify utility owners-of-record within the vicinity of the proposed well and borehole locations. The utility owners-of-record, or their designated agents, will be expected to clearly mark the position of their utilities on the ground surface throughout publicly owned areas. In addition to contacting USA, a private utility locator will be contracted to assess the locations of potential underground utilities (i.e., pipes, electrical conductors, fuel lines, and/or sewer lines) in the vicinity of each well and borehole location before intrusive work is performed. Additionally, the locations will be cleared to a depth of 5 feet below ground surface (bgs) using air-knife, hydrovac, and/or hand-digging methods to further evaluate the presence of underground utilities. The proposed well and borehole locations may be adjusted in the field based on the presence of utilities. Permitting Applicable well installation and soil boring permits will be obtained from the San Joaquin County Environmental Health Department (SJCEHD) before drilling activities begin. Monitoring wells will be installed in accordance with SJCEHD Well Standards. Field Activities This section describes the proposed methodology and procedures for the soil boring advancement, well installation, well development, well survey, and handling of investigative derived waste (IDW). www.arcadis.com 3/7 Lathrop UST Site Investigation and Well Installation WP 9.30.24_final