ARCHIVED REPORTS_XR0008383 - Laserfiche WebLink

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VVZ1 INC ' 3 0 SCOPE ' 31 Soil Borings 9 1 Prior to initiating work, drilling permits will be obtained from San Joaquin County ' Environmental Health and site clearance will be obtained from Underground Service Alert All work will be conducted in accordance with the WZI Health and Safety Plan (Appendix 1) ' The proposed soil boring locations shown on Exhibit 1 are 1) in the northern portion of the site in Area "D", 2) adjacent to the LNC office building in Area "B", and 3) to the south of ' the LNC property where a TCE soil gas anomaly was identified by DTSC (NERI, 1996) Soil cores will be obtained by PRECISION SAMPLING, INC (PSI) utilizing a direct-push ' system to obtain continuous core samples Drilling and sampling will be conducted following the protocol in Appendix II Unlike conventional drilling techniques, no drill cuttings are generated with the direct-push system A 2 4 inch diameter drive casing and ' an inner sample barrel are simultaneously pushed, driven, or vibrated into the ground Continuous soil cores will be collected in clear plastic liners inside the inner sample barrel ' After being advanced three feet, the inner sample barrel is retrieved, while the drive casing is left in place to prevent the borehole from collapsing The drive casing ensures that ' subsequent soil samples are collected from the targeted interval, rather than potentially contaminated slough from higher up in the borehole Aflame ionization detector will be ' used to monitor breathing space during drilling operations and to screen retrieved soil samples After retrieving the inner sample barrel, the sample liners are removed, sealed, labeled, and preserved on ice A new three foot inner liner barrel, fitted with plastic liners will be lowered to the bottom of the borehole An additional three foot section of the drive ' casing is attached at the surface and the process is repeated The borings will be advanced to groundwater 12270020 025 4