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H. KLEINFELDER & ASSOCIATES File : PW86-2016/15 : 405 August 5 , 1986 Page 4 Sample Analyses A maximum of two soil samples per boring will be submitted for laboratory analysis by a State-certified laboratory. The sample collected at the terminus of the boring will be submitted. In addition, the sample registering the highest PID reading will also be submitted. Should none of the samples from a particular boring register on the PID above background levels, only the terminal sample will be submitted for analysis. Analysis will be run for total hydrocarbons using EPA approved procedures. Should contamination be indicated from the initial analysis, more specific analyses for benzene, toluene, and xylene (BTX) and; total lead can be performed at additional cost . Monitor Well Installation Two-inch diameter monitoring wells will be installed in the borings according to the specifications outlined in section 2647 of the Subchapter 16 regulations . JHK&A will secure any well permits necessary. The following construction materials and standards are proposed for each well installation: o Two-inch diameter 0 . 020 slotted Schedule 40 PVC screen will extend from the bottom of the well to 5-10 feet above the saturated zone . o Blank Schedule 40 PVC will extend from the screened interval to within one foot of the surface and will be capped with a locking cover for security. o All PVC will be threaded with no glues used during assembly. o Clean No . 3 Monterey sand will be used as a filter pack and will extend from the bottom of the well to two feet above the screened interval . o A minimum of two feet of bentonite clay will be placed on top of the sand pack to preclude the infiltration of surface water into the well . o The remaining annulus above the clay seal will be backfilled with a cement-bentonite slurry to grade . o A cast iron Christy box cover will be installed flush at grade .