Laserfiche WebLink
KLEINFELDER <br /> Trenching Locations <br /> A minimum of five areas will be investigated by trenching as shown on Plate 1. The purpose of <br /> these trenches will be to assess the nature, depth and lateral and vertical extent of the debris. The <br /> redge of waste at each trench location will be staked so that, during preparation of the closure <br /> plan, a survey crew can incorporate the staked locations into the base survey of the property from <br /> which the closure contours will be developed. <br /> 2.1.3 Sampling Procedures <br /> Qualitative Field Screening <br /> Gas was detected during a previous study on the adjacent Cove property, therefore, for the <br /> protection of the trenching crew, a combustible gas meter will be used to measure the gas <br /> concentrations during trenching operations. In addition, at least 3 temporary gas probes will be <br /> driven into the fill to a depth of approximately 3 to 5 feet. The probes will be purged and then <br /> readings will be collected for methane, CO2, 02, and pressure. <br /> Saml2ling Technique <br /> c due <br /> Grab samples will be collected from the soil pile or the excavator bucket. The open trench will <br /> not be entered either to log the subsurface conditions or to collect samples. Samples will be <br /> collected using a hand trowel that will be decontaminated before and between samplings. <br /> Pertinent sampling information will be recorded in Kleinfelder's daily field notes. <br /> 2.1 <br /> .4 Field Documentation <br /> Results of the field investigation will be recorded by the Kleinfelderrofessional on-site during <br /> g <br /> the investigation. In addition to field notes and trench logs, the trenches will be photographed <br /> and the location of the trenches will be measured relative to a convenient benchmark such a <br /> fence line or corner post. <br /> 23-4824150-A00/CR96S052 Page 4 of 7 June 7, 1996 <br /> Copyright 1996 Kleinfelder,Inc. <br />