ARCHIVED REPORTS XR0012675 - Laserfiche WebLink

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x "Y _011 -,NIZ-4701-1-1- F " 1. H. KLEINFELDER &ASSOCIATES Filet 24--1045-2/27:704 December 1, 1986 Page 3 the water table. The annular space between the pipe and the wall of the boring will be backfilled with a clean sand to a minimum of two feet above the top of the perforation. A two-fcot bentonite plug would be placed above the sand pack as a seal against surface water infiltration. The remaining annulus would be backfilled with a cement-bentonite slurry to grade. The well would be placed inside a steel-locking well cover or Cristy Box to discourage vandalism, or tampering. A typical monitoring I well diagram is included at the end of this proposal. Initially one monitoring well is proposed. Based on results of soil and water sampling and screening, more wells may be required. Well DeyQlooment_and Sampling Before sampling the monitoring well should be developed to remove mud and Eines generated by drilling operations. The well would be developed by an air-lift development tool and surging. After development, the formation will be allowed to stabilize for at least one week before sampling. A water sample would be collected from the monitoring well after three to five well volumes have been removed, and parameters of temperature, pH and conductivity have s;t.abilized., JHK&A maintains a ground water sampling truck with the instrumentation, sampling and decontamination equipment necessary for the collection of an unbiased water sample. Sample A11allysia soil and water samples will be transported under chain-of-custody to a State approved testing laboratory. We recommend the soil and water samples be analyzed for total hydrocarbons (GC/FID) and benzene, toluene and xylene. Based on field screening with the PID, we recommend the sample with the highest reading from each boring be submitted for laboratory analysis. Should no organic volatiles be detected with the PTD, the deepest soil sample above the water table from each boring should be submitted to verify the absence of petroleum hydrocarbons. Report Prgparation The report will be based on the information obtained from this investigation. It should be stressed that this is a preliminary -- -- --=investigation-and that -more-soilborings--and-monitoring wells may-be -- -. - —---- necessary to characterize this,. site. To perform this investigation we would require the following from A. Teichert & Sons, Inc.