SR0085211 (2) - Laserfiche WebLink

Home Browse Search

Investigation Workplan 1301 East Lockeford Street Lodi,California 95240 Partner Project Number 22-360172.15 June 15, 2022 Page 12 direction to the southeast and southwest. The subsurface is expected to consist of a varying combination of clay, silt, and sand from the ground surface to at least 40 feet bgs. Objective The objective of the project will be to evaluate the impact of VOCs to soil, soil gas, groundwater as a consequence of a release or releases from the historical on-site operations. To further investigate the identified REC, Partner will conduct an Investigation. The investigation scope will include the advancement of two borings to facilitate the collection and analysis of soil, soil gas, and/or groundwater samples. Scope Sampling procedures will generally conform to the requirements of the San Joaquin County Environmental Health Department (SJCEHD), the State Water Resources Control Board (SWRCB), the Department of Toxic Substances Control(DTSC),and the EPA.A state-certified laboratory will analyze the samples and the project will be performed under the responsible charge of a qualified Partner representative. Laboratory results will be compared with San Francisco Bay RWQCB ESLs. Partner will perform the following tasks for the Investigation: • Update the site-specific health and safety plan; • Notify Underground Service Alert North (USAN) a minimum of three business days prior to drilling activities to clear public utilities; • Update the necessary drilling permit from the SJCEHD. Permit acquisition will involve submitting an updated application and site plan to the SJCEHD for review and approval and remitting the necessary fees.The turnaround time of the SJCEHD to issue the permit is expected to be no more than two weeks; • Notify the applicable regulatory agencies a minimum of 48 hours prior to drilling/backfilling activities; • Clear boreholes and probes of utility lines through a geophysical survey. Boring/probe placement will be modified as necessary based on the geophysical survey results to avoid damaging underground features.Additionally,to the extent practical based on subsurface lithology,clear boring locations using hand tools; • Photograph site conditions; • Advance two exterior borings to the north and south of the northern warehouse building to a terminal depth of 40 feet bgs, or groundwater, whichever is shallower, collecting soil samples at 2 feet bgs and at 5-foot intervals from 5 feet bgs to the terminal depth and a grab groundwater sample at the terminal depth; • Field-screen each soil sample using a photoionization detector (PID); • Prepare up to 18 soil samples and two groundwater samples for laboratory analysis; • Install temporary soil gas probes in each boring at 5 and 15 feet bgs.The final screening depths at each borehole will be adjusted based on the encountered lithology. In general, probes will be screened within coarser-grained materials and clayey/saturated intervals will be avoided, if possible; • Purge each probe, then collect and prepare up to nine soil gas samples for laboratory analysis using laboratory-provided, batch-certified SUMMA canisters and flow controllers with a 5- to 10-minute sample period; PARTNER 0 00