Agenda - Council - 05/24/1984 - Laserfiche WebLink

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:1 I I I I i I I I '1 I I I I Volatile Organic Compounds Monitoring and Analysis Anoka Municipal Sanitary Landfill Page -2- Terry Miller residence on February 23, 1984. This sample was sent to the SERCO and ETC Laboratories. Table 2 contained in Attachment 1 provides a sun,nary of this data. It became quite evident there were significant differences. In many cases, the value reported by ETC Laboratories was substantially lower than that reported by SERCO. Subsequently, we contacted the SERCO Laboratories and they forwarded their letter ~f April 13, 1984 (Attachment 2) indicating that they revised a number of the previously reported values for the VOC's. It should be noted that we have included their revised values on all of the tables in Attachment 1. It is our opinion that some of the procedures utilized by SERCO in the September and October sampling may have been in error or may not be the most exacting. Furthermore, our field monitoring technician reported that some of the procedures utilized by SERCO on February 23, 1984 do not meet the quality control standards utilized by Waste Management, Inc. for this type of sampling. Based on a review of the above information we have come to the following conclusions. Past laboratory analysis performed by SERCO is questionable with regards to the September and October sampling for volatile organic compounds. Improper or inadequate field control during sampling by SERCO may have resulted in field errors prior to or during sampling. The wells sampled may not have been properly developed prior to the actual extraction of the samples. Testing by the ETC Laboratories would suggest that the number and level of volatile organic compounds detected may be substantially lower than that reported by the SERCO Laboratories. We believe that before monitoring is done to determine the extent of VOC ~migration downgradient from the Anoka Municipal Sanitary Landfill, the above questions should be resolved and sound base data obtained as to the degree of contamination present at the landfill itself. To do this, it would be our intent to utilize the ETC Laboratories to sample for the VOC's and to perform the next sampling during the. routinely scheduled July period of 1984. This would allow us sufficient time to properly develop the wells, to submit the laboratory procedures, and quality assurance control programs that ETC will be utilizing. At your suggestion, we would include the shop well during the July sampling. It would be our intent to inform your office fourteen days prior to the sampling and field development of the wells. We believe that the procedures as outlined in the Minnesota Pollution Control Solid Waste Disposal Facility permit W-94 under Section II-C.8 will assure us that the proper well development has been performed.