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hammer with a 30-inch drop The brass sleeves and sampler will be washed with an Alconox j <br /> solution, and rinsed with deionized water prior to each use <br /> One brass sleeve containing soil from each interval will be capped, sealed, labeled in accordance <br /> with EPA protocol, recorded on a chain of custody form, placed in a cooler at 4 degrees <br /> centigrade or less, and transported to a California certified analytical laboratory for the specified <br /> analyses under proper chain of custody documentation <br /> Another brass sleeve will be used for lithologic description All field data regarding lithology, <br /> recovery and blow counts will be recorded on boring logs <br /> I <br /> 34 Field Screening of Soil Samples <br /> One brass sleeve will be used for field screening of samples The material from the top tube will <br /> be placed in a sample jar to approximately 50 percent capacity, shaken, and stored for a period <br /> of approximately 15 minutes A standard headspace reading will be collected at this time using <br /> a Foxboro organic vapor analyzer (OVA) or equivalent field instrumentation and noted on the <br /> boring log <br /> 3.5 Soil Analyses <br /> Soil samples will be analyzed by a California certified laboratory in accordance with State <br /> I <br /> guidelines and EPA protocol The samples will be selectively analyzed for total petroleum <br /> hydrocarbons (TPH) quantitated against both gasoline and diesel standards, benzene, toluene, <br /> ethylbenzene, and total xylenes (BTEX), and total lead using EPA methods 8015,, 5020, and <br /> 7241, respectively It is anticipated that eight samples from each deep soil boring and two <br /> samples from the shallow boring will be analyzed for TPH BTEX analyses will be conducted <br /> on any sample with a detectable concentration of TPH One sample from each boring, collected <br /> at the depth corresponding to the highest TPH concentration, will be analyzed for total lead <br /> 36 Installation of Monitoring Wells <br /> Three groundwater monitoring wells will be constructed in soil borings as shown on Figure 2 <br /> The wells will consist of 4-inch, flush threaded, schedule 40 PVC slotted and blank casino A <br /> threaded end cap will be placed at the bottom of the PVC which will then be set,i through the <br /> auger The screened PVC casing will consist of 0 02 inch machine-cut slots The screened <br /> interval will be determined following evaluation of subsurface conditions, and will) be installed <br /> from approximately 20 feet above, to 20 feet below, the static groundwater level Number 3 sand <br /> (or equivalent) will be poured down the auger while removing approximately 2 feet of auger at <br /> a time The filter pack will be placed 2 feet above the screened interval Three feet;of bentonite <br /> pellets will be poured through the augers to form an annular seal A cement/bentonite mixture <br /> will be used to fill the annular space to one foot below grade Traffic-rated, flush-mounted well <br /> bones will be installed at a height of approximately I inch above grade to minimize,the potential <br /> for surface runoff entering the well <br /> A 112511 WP 5 <br />