ARCHIVED REPORTS_XR0011966 - Laserfiche WebLink

Home Browse Search

Problem Assessment Work Plan CSUS—Multi-Campua Regional Center January 23,2003 Page 4- i will be gently emptied from the bailer into the appropriate laboratory supplied containers. The sample containers will be sealed, labeled, placed in a cooler chilled with ice, and delivered under chain-of-custody procedures to a California certified laboratory for analyses. LM The piezocone, associated push rods, and groundwater sampler will be thoroughly cleaned before each boring is advanced and before each groundwater sample is collected using laboratory-grade,non phosphate L detergent and deionized water, and double rinsed with deionized water. Upon completion of the boring and sampling, the borings will be grouted with neat cement. The cement will be tremied into the borehole to avoid bridging. 4.0 MONITOR WELLS —FIELD METHODS Condor anticipates that a minimum of one shallow monitor well and one deep monitor well will be installed at the site. The number, depth, and location of the wells will be determined following analysis of the data collected from the CPT borings and groundwater sample laboratory analytical results. Condor will prepare an addendum to this PAWP to propose the number, location, depth, and well construction methods to be used. The addendum will be submitted to CSUS for approval prior to installation of the monitor wells. This section includes a description of the site preparation, drilling procedures, and monitor well surveying, Lo development, and sampling. 4.1 SITE PREPARATION Condor will complete monitor well permit applications and obtain the required permits prior to the fieldwork. Condor will schedule and coordinate all field activities through CSUS. The proposed monitor well locations will be marked with white paint and USA will be notified at least 72 hours in advance of the �✓ fieldwork to locate and identify underground utilities in and near the work area. Because companies contacted by USA may not identify utilities past private property lines and into the site, however, it is the responsibility of CSUS to identify any site utilities. 4.2 DRILLING PROCEDURES + Prior to commencement of fieldwork, a tailgate safety meeting will be held and a site-specific Health and +— Safety Plan will be discussed with, and presented to, all field personnel for their signatures. The monitor well borings will be drilled using 8-inch outside diameter, continuous-flight, hollow-stern auger. The hollow-stem auger and other down-hole equipment will be decontaminated between borings by steam a. cleaning to prevent cross-contamination. All drilling activities will be observed by a Condor geologist. Drill cuttings for the monitor well borings will be logged according to the Unified Soil Classification System ! (USCS). Descriptions of soil types encountered and any other pertinent field observations will be recorded i on boring logs. Cuttings will be placed in a polyethylene bag and checked with a PID for the presence of hydrocarbons. All visual observations and PID measurements will also be noted on the boring logs. The drill cuttings and steam cleaning effluent will be placed in DOT-approved 55-gallon drums, sealed, labeled, and left on-site pending laboratory analyses. Disposal of hazardous materials, if any, will be the ` responsibility of CSUS. 4.3 MONITOR WELL SURVEYING, DEVELOPMENT, AND SAMPLING Condor's licensed land surveyor will determine the location and relative elevation of the well collars following the installation of the monitor wells. The well collars will be surveyed with a vertical accuracy of 4M %s CONDOR