Laserfiche WebLink
J. H. KLEINFELDER & ASSOCIATES <br /> File: S-1008-21/12 : 337 <br /> Revised: July 8 1986 <br /> Page 9 <br /> o Samples will be transported immediately under chain-of- <br /> custody to the selected laboratory that will. perform <br /> the analyses. <br /> Results of laboratory analysis will be kept in a tabulated <br /> form and graphed to alert the reviewer of any changes in overall <br /> water quality. Collected water level data will be evaluated to <br /> determine the local ground water gradient on a quarterly basis. <br /> QA/QC <br /> To document the effectiveness of the field and laboratory <br /> protocols for generating accurate, meaningful, and reproducible <br /> data, the general approach is to submit blind samples which <br /> include blanks, spikes, and duplicates to the laboratory for <br /> analysis. It is recommended that the water sampling program <br /> include blind duplicate samples, spikes, and/or blanks for <br /> approximately 15% of the sample sites. It is suggested blank <br /> and/or spike samples be prepared and submitted for analysis, <br /> identified as if they were from a site well . <br /> METHANE GAS MONITORING <br /> Objectives/Justification <br /> Although not required by Subchapter 15 , soil gas monitoring <br /> has been required by the Solid Waste Management Board. Control <br /> of methane gas can be important at sites where biodegradable <br /> organics are present . Anaerobic decomposition of organics <br /> produces methane gas, which forms an ignitable mixture with air <br /> at concentrations between 5 and 15 percent (EPA-SW-625) . Methane <br /> is usually not an explosive hazard in soil, since its <br /> concentration is usually much greater than the upper explosive <br /> limit of 15 percent . Approaches to the control of methane <br /> migration are aimed principally at stopping lateral subsurface <br /> migration. (Everett, 1985) <br /> Previous Investigations <br /> A series of methane gas tests were performed at the labor <br /> camp in September of 1984 . Five borings were drilled between the <br /> labor camp and the landfill site to the east in order to test for <br /> the presence of methane gas in the soils. The tests were <br /> performed by inserting an air hose into the borings and drawing <br /> air/gas into a portable methane gas detection meter . The <br /> locations of these borings are shown on Plate D. <br />