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I� I I- Pra6lem Assessment Work Plan CSUS—Multi-Campus Regional Center January 23,2003 .4 Page-4- willwill be gently tied from the bailer into the appropriate laborata su lied containers. The s le g Y � laboratory PP , � 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. TheP iezocone, 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 # 4 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 tremiedinto the borehole to avoid bridging. I ' 1 4.0 MONITOR WELLS —FIELD METHODS Condor anticipates that a minimum of one shallow monitor well and one deep monitorwell 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, development, and sampling. 4.1 SITE PREPARATION Condor will complete monitor well permit applications and obtain the required permits prior. to the I 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 coippanies ' 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. t 4.2 DRILLING PROCEDURES a 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-stem auger. The hollow-stem auger and other down-hole equipment will be decontaminated between borings by steam 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 13 r orded {USCS}. Descriptions of soil types encountered and any other pertinent field observations will be ec 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. ° u.; The drill cuttings and steam cleaning effluent will be placed in DOT-approved 55-gallon drluns, sealed, labeled, and left an-site pending laboratory analyses. Disposal of hazardous materials, if any, will be the ' t ;, responsibility of CSUS. E 4.3 MONITOR WELL SURVEYING, DEVELOPMENT,AND SAMPLING !.z 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 1 a 4M �� CONDOR s