10/09/85 - Laserfiche WebLink

Home

I ! I I i I I I I I I I ! I I I I I I I,lr. Ramon Burton July 12, 1~85 Page 4 co-disosal application forms along wittl our laboratory report should be forwarded to Ms. Lisa Throvig at the Minnesota Pollution Control Agency. If acceptable, tile MPCA will then issue a permit for Waltek, Inc. to dispose of these three wastestreams at the sanitary landfill. Elevated concentrations of iron in both the wheelabrator and grinding dust and chromium in tile grinding dust may pose potential problems for approval. Uowever, the volume for both of these wastestreams is small, which will hopefully be taken into consideration in tire MPCA's review for approval. Oil Waste - It is our recommendation ti~at your oil waste be disposed of through a registered MPCA transporter such as Bert's Oil. Sometime in tile near future new regulations will be promulgated by EPA/MPCA regarding control of waste oil as a ilazardous waste. When these regulations are promulgated tile management procedures for the waste oil will probably have to be changed. l;aste Water Profile Currently Waltek, Inc. discharges its wastewater streams to a drain field located adjacent to the facility. As a preliminary step to assess potential impact of this discharge to the soil and groundwater in the area representative samples of the wastewater discharge from Waltek, Inc. ~ere collected by PACE Laboratories, Inc. and analyzed for all suspected contaminants related to Waltek, Inc. manufacturing processes. A composite wastewater sample was collected by PACE Laboratories, Inc. This sample was obtained by collecting grab samples from the Set Up ~astewater stream, shell room rinsewater and rinsewater from the parts tank. Our report of laboratory analyses for the shell rinse set up composite is attached for your review. It is estimated by Waltek, Inc. personnel that the combined industrial wastewater discharge to the drain field 'is approximately 2500 to 30U0 gallons per year. Based upon our analysis it appears that some care Should be exercised in ~)ischargil~g t))e ~'~aste~ater to the drain field to assure that it is 9roperly neutra)ized before discharge. Composite wastewater analyzed had ~ p(( of 2.1. Caustic should be added to the wastewater to raise the pH b'et:veen 6.5 and 9.0 prior to uisci~arge. Outside of corrositivity the c>tner parameters analyzed o~ the wastewater sho~.~ed i t to be non-hazardous. Additionally, comparing tK~e metal values obtained on the wastewater stream to the Safe Drinking Water Act (SDWA) primary and secondary standards for metals only chromium at O.U9 rog/1 (SDt~A is 0.05 rog/l) and iron at 1.5 rog/) (SDt,~A is 0.3 rog/l) exceeded the Safe Drinking ~ater Act criteria. Ti~e laboratory data ~)so shows trace levels of volatile . :;,~:, i..., )~',~s,~ib i~ ~:~1'_' '.cas t'Jwa Let~ di