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Site Investigation Work Plan Raymond Investment Corporation ' Former Helena Chemical Facility Page 6 A groundwater sample will be collected at least 48 hours following development of each monitoring well. ' Prior to sample collection, the static water level in the well will be measured to the nearest 0.01-foot with a battery-operated water level meter. A disposable bailer will be lowered into the well to check for floating product, petroleum odor, and/or sheen. If floating product is encountered, the thickness of the product will be measured, but no laboratory sample will be collected. The monitoring well will be purged using a clean, disposable bailer until the temperature, electrical conductivity, and pH of the water have stabilized. At least three casing volumes of water will be purged from the monitoring well. The water purged from the well will be containerized in 55-gallon drums and left on Site pending analytical results of the groundwater samples. The groundwater samples will be collected with a clean, disposable bailer and transferred to laboratory-supplied containers. Each container will be labeled for sample identification and placed in a cooler chilled with ice. Upon completion of the fieldwork, the groundwater samples will be delivered under chain-of-custody procedures to a California-certified laboratory for analyses. 8.0 REPORTING Condor will prepare a report detailing the findings of the investigation and well installation to be submitted to the CVRWQC13 and the SJCEHD. The report will include a discussion of the field and ' laboratory procedures used to conduct the investigation, a discussion and presentation of the analytical results, and recommendations including a sampling and analysis plan. Condor will include a site conceptual model. Condor will use the data collected to prepare a remediation feasibility report after consultation with the CRWQCB. 9.0 PROJECT SCHEDULE Work can commence upon approval of this work plan by the CVRWQCB and notification by the client to proceed. The field portion of the investigation can be completed within approximately eight weeks after the necessary permits are received. A report can be submitted to the CVRWQCB and the SJCEHD within ' four weeks of the completion of the fieldwork. If you need additional information or have any questions, please call Bill Cook at (209)234-0518. Respectfully submitted, ONAL CONDOR EARTH TECHN , o� O� O0 ' a BILL A. COOK III No.TIFIE 2534 RING EOLOGIST �Q Bill A. Cook III,PG, C.E.G. Q� Alex . Dewitt, PG Senior Geologist OF CA��FO Vice President, Environmental Services X:TrojecP,6000_prj 6847 Raymond Investments-Melena Chemical'Reports`,Work Plan D WP 20140617-6847.docx 1 ' +'a CONDOR