COMPLIANCE INFO - Laserfiche WebLink

Home Browse Search

GSI Job No.: 14� G S 1T Issued: 15 November 2017 ENVIRONMENTAL • Along sewer laterals from the two tenant spaces and along the main lateral from the Site to the sewer main line in Hammer Lane. Data generated during this phase of sampling will allow for interpretation of shallow lithology and identify the concentration of PCE and other VOCs, if present, in soil and soil gas across the Site. If PCE or other VOCs are detected, and the extent is not characterized by the investigation activities described herein, a subsequent phase of investigation will be proposed, which will consider the distribution of VOCs and stratigraphy in the development of the sampling approach. 5.0 FIELD INVESTIGATION The field investigation consists of collecting soil and soil gas samples at the locations shown on Figure 1 and analyzing select samples for VOCs. Sampling locations may be adjusted during the investigation based on field-verified locations of sewer lines, observations made in the field, and access. This Work Plan includes the following tasks. • Pre-field Activities: preparing a Site-Specific Health and Safety Plan, performing a geophysical survey, and marking sampling locations for Underground Services Alert (USA) notification. • Fieldwork and Laboratory Analysis: collecting soil and soil gas samples, and analysis of samples by state-certified laboratories. • Data Evaluation and Reporting: evaluating soil and soil gas results and preparing a report of findings and recommendation for additional investigation, if warranted. The Water Board will be notified at least 72 hours prior to field sampling. The field activities are anticipated to take 2 days to complete. The following sections describe the tasks that will be performed during this phase of investigation. 5.1 Site Health and Safety Plan GSI will prepare a Site-specific Health and Safety Plan (HASP). GSI field personnel will use the HASP during the field activities while implementing the Work Plan, and all field personnel and subcontractors will read and sign the HASP prior to executing field activities. The HASP will address the potential risks to the personnel performing the sampling activities outlined in this Work Plan. 5.2 Geophysical Survey and USA Notification At least 48 hours prior to initiation of sampling activities, GSI will mark sampling locations and notify Underground Service Alert (USA) of the planned sampling activities at the Site. USA will contact utility owners of record within the vicinity of the Site to notify them of the planned work in proximity to their buried utilities. The utility owners of record, or their designated agents, will mark the position of their utilities on the ground surface. In addition to notifying USA, GSI will arrange for a subcontractor to conduct a geophysical survey in an effort to identify subsurface lines and obstructions at each sampling location. In addition, the geophysical survey will attempt to field-verify the location of on-Site sewer laterals. Site Investigation Work Plan Park Woods Cleaners