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Sampling Equipment <br /> ; 0 <br /> Interim gas sampling probes were used to monitor subsurface <br /> gases at the landfill perimeter. <br /> Each probe consists of a S-fdot long, Yx-inch diameter stainless steel pipe, with 4-inch' <br /> staggexed every 2 inches at the bottom 18 inches to allow for gases-to holes <br /> pointed tip was welded to the end of the probe for better penetration. die into the probes. A <br /> A ball valve and bless fitting were installed at the topof each robe to contain <br /> p gas <br /> pressures and <br /> facilitate instrument hook-up to the probe.The valves were left closed cxc t d <br /> 4r ' enit read' eP during monitoring <br /> nig.Each probe is tagged with a brass plate and identified as "CrP-1" through <br /> AGA-go Landtec Eafm-red Gas Analyzer was used to monitor methane. <br /> and Oxygen(02)levels at each probe location..The anal , �� �O�de'(CO�j, <br /> yzcr was calibrated for methane,COq,and <br /> 02 prior to use in the field_Calibration.logs are.ineluded in this report, <br /> Gas Monitoring <br /> Ambient air <br /> measurements of methane, oxygen, carbon dioxdd `A-> <br /> taken at each e, and barometric prtssure were <br /> gas probe locative ?hose readings were recorded and-the instrument- was <br /> connected to the probe_ 'The valve was opened and probc.gas pressure measurements were taken_ <br /> The probe was them purged fortwo probe <br /> volumes-Readings were thou collected at <br /> p'roxinzately 30- to 64-second intezvals, un ._a stable reading was .obtained-_ ?hese <br /> meas'Lrerneras of methane,oxygen, carbon dioxide,and ambient barometric p=urc were then <br /> recorded- Monitoring was also conducted at various locations in thrre building s for the - <br /> Presence of methane gas_ Monitoring was conducted at the office, trailer at the entrance to the <br /> landfill, trailer boxes at the scrvdcc shop, and trailer boxes at the transfer building. ?hese <br /> locations were monitored for any gas pockets at the foundation and near any opening from the <br /> 1II0or such as piping holes,electrical conduits,or Boor cracks. <br /> LY <br /> Lysime-tcis were sampled using the fallowing standard protocol: <br /> l. Prior to sampling lysimeters,the pressuravacuum equipment is checked and cleaned. <br /> 849401\23IOR3?.3 A,12 <br /> 2000 .k, J*14,2000 <br />