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ADDITIONAL ASSESSMENT WORKPLAN <br /> 3AMAR SERVICE, STOCKTON <br /> APRIL 2002 <br /> The hydropunch tool will be pushed into the specified zone and then withdrawn approximately <br /> 2-feetto expose an inlet screen The interior of the sampling tool will fill with water and a 1-mch <br /> stainless steel or Teflon bailer will be lowered to extract a groundwater sample These <br /> groundwater samples will be collected from selected depth intervals based on previously acquired <br /> CPT-hthology data which indicate favorable conditions for sampling groundwater GHH <br /> anticipates collecting a mmimum of three groundwater samples from each boring <br /> Groundwater samples will be collected using a new disposable bailer, and transported to a state <br /> certified analytical laboratory under proper chain-of-custody(COC)documentation The <br /> groundwater sample will be decanted from the bailer into laboratory provided containers <br /> appropriate for the analytical method requested The samples will then be placed into a chilled <br /> cooler in preparation for transport to the laboratory Strict COC protocol will be followed during <br /> sample collection and handling <br /> Groundwater Analyses <br /> Analyses of the groundwater will be performed by a California certified laboratory in accordance <br /> with state guidelines and EPA protocol The groundwater samples will be analyzed for TPH G, <br /> TPH D, BTEX, 1,2-DCA, EDB, and fuel oxygenates using EPA Methods 8015M and 8260B, <br /> respectively <br /> Soil Sampling and Analyses <br /> The CPT drill ng equipped with 2-inch diameter hollow stern rods fitted with a 2-inch diameter <br /> piston soil sampling assembly loaded with a pre-cleaned brass sleeves will be used to collect <br /> representative soil samples from depths determined by field evaluation of the CPT logs Selected <br /> soil samples will be analyzed for TPH G,TPH D, BTEX, 1,2-DCA,EDB, and fuel oxygenates <br /> using EPA Methods 8015M and 8260B,respectively. It is anticipated that a minimum of three <br /> soil samples from each boring will be analyzed Organic vapor emissions from the soil samples <br /> will be monitored in the field using a photo ionization detector (PID) or flame ionization detector <br /> (FID) organic vapor analyzer <br /> Sensitive Receptor Survey <br /> In accordance with, Section 2654(b)(2), Article 5, Chapter 16, Division 3, Title 23 of the <br /> California Code of Regulations, the location of all nearby water supply wells and those within <br /> 2,000-feet of the site, as well as surface water sources and other sensitive receptors will be <br /> identified and documented in the PAR <br /> 6 <br />