ARCHIVED REPORTS XR0009502 - Laserfiche WebLink

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' Work Plan Page 5 Former Manna Pro Site ' Project No 207 3 August 16, 1999 ' • Construct and operate a pilot air sparge system A new well will be drilled and constructed in a boring completed to 55 feet below grade The well will be used to ' infect air in an attempt to mobilize deeper hydrocarbons to the groundwater surface where they may then be removed and destroyed by vapor extraction This test will be conducted in conjunction with the pilot vapor extraction work mentioned above ' • Install a boring into groundwater and backfill the boring with Oxygen Release Compound (ORC) The ORC will generate infuse dissolved into the groundwater at a point down gradient from the sparge/vapor extraction pilot test site Groundwater ' conditions will then be monitored in down gradient monitoring wells to evaluate whether the ORC will effectively prevent the lateral spread if hydrocarbons as a result of the other remedial activities • Prepare a report which will document the activities mentioned above and describe the results and their implications I • Based on the results and past work performed at the site, a Feasibility Study will be completed as part of the report which will evaluate the effectiveness of at least 3 possible remedial methods Among these methods will be the sparge/vapor extraction method, vapor extraction alone, the groundwater/vapor extraction option, and natural attenuation alone (i a no engineered remedial action) • One year of quarterly groundwater monitoring is to be conducted including monthly measurements of groundwater depth Upon approval of this work plan by the LOP agency a detailed budget will be prepared and submitted to the State USTCFP for pre-approval of the expenditures 2.0 WATER WELL SURVEY In order to help determine if human health may be at risk as a result of this release, a Isurvey will be conducted to determine if any water wells exist within a minimum of 2,000 feet of the point of release This will include both a records search and a physical search for wells 2.1 Records Search A records search will be conducted in an attempt to identify wells located within a 2000 foot radius of the point of release This will be done by requesting access to records on file with the State Water Resource Control Board The relevant USGS maps for the area will also be reviewed to determine if any wells are identified on them 2.2 Physical Search I The records search will be supplemented by a physical search of assessable areas in attempt to visually identify any well which may not be identified in the record search In 2937 Veneman Ave ,#B240 Geo-Phase Environmental Inc Phone(209)569-0293 Modesto, CA 95356 Fax (209)569-0295