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4 <br /> r <br /> HS <br /> .aj7 • <br /> w <br /> Moreland court ShILourt <br /> 7700 MroJect Court,Stockton,CA I fJ <br /> Page PraJsct Na.40-38-146 � <br /> Page 6 <br /> �. � 4,, '� <br /> A California modified split-barrel sampler will be used to extra soil samples from the soil borings. <br /> s Three six-inch brass tubes will ba inserted into the California sampler to retain the soil sample. <br /> Upon retrieval,one brass tube will be capped,packaged,and preserved according to accepted EPA <br /> ! prccadures for possible chemical analysis. One sample from each sampler will be extracted and <br /> placed in a sealed jar until completion of drilling activities. <br /> I'. Samples placed in jars will be brought to room temperature and the head space of each jar will be •Y <br /> f , <br /> screened for total organic vapors u ilizing a portable photoionization detector. Appendix A,Section <br /> [ 1.3, describes the detailed soil-screening procedures. Basel' on this screening information, sail® 1 } <br /> a <br /> samples will be selected for chemical analyses to determine the vertical extent of the presence of <br /> petroleum constituents in the sail of each boring. sS <br /> 13 Monitori 3XIIl Installed W <br /> i <br /> frj The monitoring wells will be constructed of 4-inch-diameter, 0.010-inch Schedule 40 (flush- <br /> threaded) PVC screen and 4-inch-diameter schedule 40 blank casing. The screened interval will <br /> ext.nd to approximately 10 feet below and S feet above the water table. The proposed monitoring <br /> tr( wall specifications are illustrated in Figure 3. <br /> Monitoring wells will be developed by pumping using the methods described in Appendix A,Section <br /> I.S. Ground water samples will be collected from each monitoring well using methods described in <br /> Section.1.6 of Appendix A. In order to establish the direction of ground water flow, depths to <br /> ground water will be measured in the monitoring wells. <br /> 3.4 Chemical Anahm <br /> 3.4.1 Soil Ch2m1cALAnaLYM <br /> Based on the results of soil sample screening,soil samples will be selected from each soil boring and <br /> K . <br /> sent to aCalifornia-certified laboratory for chemical analysis. The soil samples will be analyzed for a}C <br /> B:'EX,(EPA Method 8020),TPH(EPA Method 8015 medified),and total lead(FPA Method 6010). <br /> 7.4.2.Ground_T A er ChemlIRLABILLYM <br /> -- - -� - ---Ground water samples collected-will_be analyzed for_BTEX(EPA_Method 602),TPH_ (EPA Method - <br /> i <br /> { <br /> 8015 modified), and total lead A Method 5010 / <br /> .a <br />