Laserfiche WebLink
Ms. Margaret Lagorio, SJCEHD November 30,2007 <br /> Work Plan for Additional Assessment Project No. 2033-15688-01 <br /> 15688 Harlan Road, Lathrop, California <br /> Page 7 <br /> filter pack, the well will be surged to settle the filter pack and additional sand will be <br /> added, if necessary. Approximately four feet of bentonite will be placed on top of the <br /> filter pack and hydrated with clean water to provide a sanitary seal for the well. <br /> Watertight locking caps will be placed over the tops of the well casings, and traffic rated <br /> vault boxes will be installed around the top of the wells. Actual well construction may be <br /> modified in the field based on conditions encountered at the time of the investigation. <br /> Task 2C: Groundwater Monitoring Well Development and Sampling <br /> A minimum of 48 hours following the installation of the monitoring wells, Stratus will <br /> return to the site to develop the wells. Development will be conducted by surging each <br /> well, followed by groundwater removal via downwell pump or hand bailing. <br /> Development will continue until approximately ten casing volumes are removed or until <br /> the wells go dry. A minimum of 24 hours following the development, the wells will be <br /> purged of three well volumes and groundwater samples will be collected from each well <br /> using a new disposable bailer. Groundwater recovered in the bailer will be transferred to <br /> proper analyte-specific containers supplied by the analytical laboratory. Each sample <br /> will be labeled, identified on a chain-of-custody form, and placed in an ice-chilled cooler <br /> for transport to the laboratory. <br /> Task 21): Waste Management <br /> Wastewater and soil cuttings generated during the activities will be stored in a DOT <br /> approved 55-gallon drum and stored on-site. Following profiling, a licensed contractor will <br /> dispose of the waste at an appropriate facility. <br /> Task 2E: Surveying <br /> A California licensed land surveyor will be retained to survey the latitude, longitude, and <br /> elevation of each monitoring wells. The elevations will be established relative to a known <br /> benchmark in feet mean sea level (MSL). These data will be submitted to the California <br /> Regional Water Quality Control Board (CRWQCB) as required by AB 2886 (GeoTracker). <br /> Task 3: Laboratory Analyses <br /> Soil and groundwater samples collected during this investigation will be submitted to a <br /> California Department of Health Service-certified analytical laboratory, under chain-of- <br /> custody, for chemical analyses. Soil samples and groundwater samples will be analyzed <br /> for DRO (CIO-C2$) by EPA Method 8015B or CADHS/LUFT, for GRO (C5-C12), BTEX, <br /> 1,2-DCA, TBA, and naphthalene by EPA Method 80260B, and for Pb and Zn by EPA <br /> Method 6020. <br /> K:Voe's Truck Plaza\Work P1ansUoe's Truck-SOUTH PARCEL-WP for Site Assessment 11-30-07.doc STRATUS <br />