Laserfiche WebLink
Sampling Equipment <br />Interim gas sampling probes were used to monitor subsurface gases at the landfill <br />Each probe consists of a S -flat long, Y2 -inch steel diameter stainlessperimeter. <br />pipe, with Y4 -inch holes <br />staggered every 2 inches at the bottom 18 inches to allow, for gases -to migrate into the proms. A <br />pointed tip was welded to the end of the probe for better penetration. <br />A bail valve and brass fitting were installed_ at the top of each probe to contain gas pressures and <br />facilitate; instruznem hook-up to the probe.. a ves wee:: left closed race t during ung monitoring <br />or instrument reading. Each probe is tagged -with a brass plate and identified as "GP -I" through <br />" Cip-10". <br />A GA -90 Landtec Infra -red -Gas Analyzer was used to monitor methane, carbon. dioxide. (COQ, <br />and oxygen (O=) levels at each probe location. 7he analyzer was calibrated for methane, COI, and <br />Oz prior to use in the field_ Calibration. logs are_included.in this report <br />Gas monitoring <br />Ambient air measurements of methane, oxygen, carbon dioxide; and barom �A <br />ei�ic•press<tce•were <br />taken at each gas probe location. Those readings Were recorded and - the instrument- was <br />connected to the probe. The valve was opened robe.gas pressure measurements were taken_ <br />The probe was them purged fortwo prize volumes_ . Readings • were then collected at <br />aPPrOXinately 30- to 60 second intervals. ' ._a stablereading was -obtained... 1hcse <br />measurements of methane, oxo'gen, carbon dinxide, and ambient barometric pr=um were then <br />recorded Monitoring was also conducted at various locations in three building sites 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 service shop, and Uzilcr boxes at the transfer building. These <br />locations wero monitored for any gas packets at the foundation and near any opening from the <br />floor such as piping holes, eiectrical conduits, or Poor cracks. <br />Ntt <br />Lysimetcis were sampled using the following standard protocol: <br />l . Prior to saampling lysitneters; the Pr== -Vacuum equipment is checked- and cleaned. <br />23-483849-FQI\2314R32i A»12 <br />C 7yrf& M KkkteCtdCr, tai hdy 14.2000 <br />