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.r <br /> Limited Site Investigation 1 Terracon <br /> ±19.41 Acres Vacant Land ■ Manteca, California <br /> June 12, 2017 ■ Terracon Project No. NB177049 <br /> SCOPE OF WORK <br /> Objectives <br /> The objective of the LSI is to perform subsurface soil and groundwater sampling and analysis to <br /> evaluate the presence/absence of total petroleum hydrocarbons (TPH), volatile organic <br /> compounds (VOCs), and CAM 17 metals in the onsite soil and/or groundwater beneath the Site. <br /> Utility Clearance & Geophysical Survey <br /> Following authorization to proceed and no later than 72 hours prior to intrusive activities, Terracon <br /> will contact a utility locator, California DigAlert, to arrange for underground utility location at the <br /> Site. <br /> Health & Safety Plan <br /> A Health and Safety Plan (H&SP) has been prepared to address worker safety issues per OSHA <br /> requirements (29 CFR 1910.120). Level D personnel protection, which typically includes gloves, <br /> boots, and hard hat, is planned for workers unless site conditions indicate higher levels of worker <br /> protection may be necessary. <br /> Soil Borings, Groundwater Temporary Sampling Wells, Sampling, and Analysis <br /> This section describes the methods to be used for completing soil borings, converting them to <br /> temporary sampling wells, collecting soil and groundwater samples, and analytical test methods. <br /> Soil Borings <br /> Drilled borings to depths greater than 5-feet below ground surface (bgs) will be performed by a <br /> California C-57 licensed drilling contractor under the supervision of a California Professional <br /> Engineer or Geologist. A geologist experienced with investigation and remediation of chemical <br /> releases will be present during drilling to collect samples, maintain logs of the borings, and make <br /> observations of site conditions, with oversight by a California Professional Engineer or Geologist. <br /> Terracon field staff will advance soil borings at the site as shown on the attached site diagram. <br /> Borings will be drilled using a 2% - inch outside diameter (O.D.) direct push technology (DPT) <br /> percussion drilling rig using 4-foot clear acetate liners for continuous soil sampling. Soil borings will <br /> be advanced to an approximate maximum depth of 30-feet below ground surface (bgs), as soil <br /> samples are continuously collected during drilling. <br /> Soil Sampling <br /> During drilling, soil cores and/or cuttings will be collected continuously for soil logging purposes. <br /> Soil samples will be selected from continuous cores by a geologist experienced with investigation <br /> and remediation of chemical releases under the supervision of a California Professional Engineer <br /> or Geologist. Visual observations, and a photoionization detector (PID) will be used as a <br /> screening tool for identifying potentially contaminated soils in the field. Terracon estimates that <br /> Responsive ■ Resourceful ■ Reliable 2 <br />