COMPLIANCE INFO_PRE 2019 - Laserfiche WebLink

Home Browse Search

Mr.Frank E. McBee 2 Match 10, 1993 • The occurrence of the above contaminants are likely the result of man-made fill imported to the site prior to use of the site as a staging area. • In addition, samples from the staging area and the test stockpile indicate elevated levels of semivolatile organic compounds,as measured by EPA Method 8270, and benzene, toluene and xylene (BTX) as measured by EPA Method 8240. These compounds are associated with the treated wood debris. • Additional analyses were performed on soil and debris samples screened using a one-quarter inch screen. Analyses on material passing the one-quarter inch screen indicated a significant reduction of the compounds associated with the wood debris. As discussed in the meeting,a report is being completed for submittal to the County which will present the results of the laboratory analyses, including laboratory QA/QC procedures,locations of samples collected, and a description of sample collection procedures. Santa Fe's proposed plan for removal of the wood debris was also reviewed and received verbal approval from the County and CDF&G. Elements of the proposed plan are summarized as follows: • Santa Fe's contractor will rake the affected area to collect surface wood debris. The wood debris will be placed into a closed top roll-off container which, when full, will be properly disposed at a Class I disposal facility. Class I disposal of the debris is necessary due to the presence of lead occurring in background soils. • Upon a removal of surface wood debris,equipment will be used to loosen wood debris below the surface and the area will again be raked. • The above process will be repeated until visible wood debris has been removed, at which time, samples of underlying soil will be taken to conium the adequacy of the debris removal. • Twenty-four hours in advance of collecting the above samples, both Ms. Violett(San Joaquin County Environmental Health Division) and Mr. Ramirez(CDF&G) will be contacted for inspection of the site and to witness the sample collection. • Samples would be collected from a grid system comprised of 16 grids. Sixteen samples will be collected and submitted to a certified California laboratory for analysis. The laboratory, upon receipt, will composite the 16 samples into 4 composite samples for analysis by EPA Method 8270. The 4 samples making up an individual composite will be from adjacent grids. • Results of the above sampling and analysis will be summarized in a report and presented to the County,CDF&G, and the California Regional Water Quality Control Board to determine the adequacy of wood debris removal. During the meeting, the County advised Santa Fe that they had notified Contra Costa County of activities at the Jersey Island site. Additionally,the County concurred that the lead and other compounds not associated with the bridge lumber were the responsibility of the landowner. Santa Fe, however, would be required to properly dispose of the wood debris in light of the lead and other compounds. ENVIRONMENTAL SOLUTIONS