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- A <br /> } A S S O C I A T E S I N C <br /> 2.0 METHOD AND PROCEDURES <br /> F= All work described herein was performed in accordance with ATC's Workplan for Subsurface <br /> Investigation at Smiths Canal Pump Plant, dated April 13, 2001, and Addendum to Workplan for <br /> Subsurface Investigation at Smiths Canal Pump Plant, dated May 4, 2001 which were approved <br /> by PHS/EHD. The scope of work completed included obtaining permits, advancing five soil <br /> borings using direct push technology, soil and grab groundwater sampling, and the laboratory <br /> analysis of selected soil and groundwater samples. <br /> 2_1 DrilIine Activities <br /> I'M <br /> :.� On April 23, 2001, a geologist from ATC Associates supervised the advancement of three soil <br /> borings to 21 feet bgs. On May 11, 2001, a geologist from ATC Associates also supervised the <br /> advancement of two remaining soil borings to 21 and 26 feet bgs. The advancement of these soil <br /> _j borings had been postponed and relocated due to the presence of underground utilities. A site <br /> plan showing soil boring locations is included as Figure 2. Fisch Environmental, California <br /> =.� License C57 683865, advanced the borings using a truck mounted Geoprobe® narrow diameter <br /> rig employing direct push technology. Soil samples were collected in acetate sampling tubes and <br /> were described according to the Unified Soil Classification System. Descriptions of soil types <br /> encountered and sample collection intervals are presented on the boring logs contained in <br /> Appendix A. <br /> =, 2_2 Soil Sampling <br /> Each soil sample was field screened with a Flame Ionization Detector (FID) for the presence of <br /> s volatile organic compounds. Petroleum hydrocarbons were observed during field activities only in <br /> boring SB 17 at depths ranging from 14 to 16 feet bgs. The maximum FID reading from boring <br /> F: <br /> SB�_-:- 17 was 20 ppm. Sample tubes were sealed at each end using Teflon tape and plastic end caps, <br /> , <br /> labeled, and placed on ice. Selected soil samples were kept on ice and delivered under chain-of- <br /> custody documentation to State-certified Argon Laboratories Inc. (DHS Cert. No. 2359) for <br /> chemical analysis. <br /> 2.3 Groundwater Sampling <br /> One groundwater sample was collected from each boring at the depth groundwater was first <br /> encountered, approximately 15 to 20 feet bgs. A Geoprobe® Screen Point 15 Groundwater <br /> Sampler was threaded onto the leading end of the Geoprobe after groundwater had been <br /> w:162574162574A2\Mortshup_sub inv.doc 4 <br /> a <br /> j <br />