Laserfiche WebLink
CAMBRIA <br /> Cambria proposes five groundwater monitoring wells be installed at the locations shown <br /> on Figure 2. Assuming a groundwater flow direction to the southeast, these wells are <br /> placed to monitoring groundwater in t e presumed source area and upgradient, <br /> downgradient, and crossgradient of the presumed source area. <br /> Work Tasks <br /> Permits: An application for a drilling permit will b submitted to the SJCPHS/EHD. <br /> I <br /> Site Safety Plan: A Site Safety Plan will be prepared for field work. <br /> Utility Clearance: Proposed drilling locations will be marked and their locations cleared through <br /> Underground Service Alert prior to drilling. <br /> Site Investigation: Five groundwater monitoring wells (MW-1 through MW-5) are proposed as <br /> shown on Figure 2. The borings will be drilled with hollow-stem auger drilling equipment. A <br /> Cambria geologist will supervise the drilling of the borings and describe encountered soils using <br /> the Unified Soil Classification System and Munsell Soil Color Charts. Soil samples will be <br /> collected from the borings at five-foot intervals for soil description and organic vapor screening <br /> with a photo-ionization detector(PID). <br /> Soil samples will be retained in stainless steel or brass sample tubes and will be covered on both <br /> ends with Teflon sheets and plastic end caps. Soil samples will be labeled, entered onto a chain- <br /> of-custody record and placed into a cooler with ice for transport to a State of California certified <br /> laboratory for analyses. <br /> Monitoring Well Construction: Each well boring will be drilled to approximately ten feet below <br /> first encountered groundwater. The wells will be competed using two-inch diameter Schedule 40 <br /> PVC casing. The well screen interval will be appf oximately five feet above and ten feet below <br /> first encountered groundwater. The sandpack will be placed alonga entire length of the well <br /> screen and two feet above the top of the well scree followed by a two-foot thick bentonite seal <br /> and cement grout to grade. Actual well construct on details will be based on field conditions <br /> during drilling. The well will be secured with a locking cap under a traffic-rated well box. A <br /> licensed surveyor will survey the wellhead elevations relative to mean sea level and the location <br /> of each well as per State of California guidelines. <br /> i <br /> 1511 3 <br />