Laserfiche WebLink
Sharpe -3- 19 September 1984 <br /> C. 1 , 2-Dichloropropane Contamination <br /> The State and Sharpe agreed that further research <br /> needs to be done to identify all .the possible sources <br /> of 1 , 2-Dichloropropane . Although the contamination <br /> could be due to agricultural use , the fact that this <br /> constituent was not found in background wells sampled <br /> by Sharpe and is also an industrial contaminant casts <br /> doubt that it is entirely from an agricultural source. <br /> II . Revision of off-Post Well Monitoring Plan <br /> A . Sampling Well Locations <br /> The State verified with Sharpe that Sharpe will <br /> conduct a field survey of the area west and north of <br /> the Depot to identify all existing wells . Erik <br /> Friedrich will collect the data and then correlate it <br /> with all available well logs, well uses, and previous <br /> sampling results to select wells to be sampled. The <br /> State also requested Sharpe to include all the <br /> comments form the Board' s 17 May 1984 review memoran- <br /> dum which have not yet been addressed. <br /> B. Analytical Methods <br /> The State requested Sharpe to include EPA Methods 601 <br /> (purgeable halocarbons) and 602 (purgeable aromatics) <br /> and the metals Arsenic , Selenium , Beryllium, and <br /> Thalliun in all off-post sampling. In addition, EPA <br /> Methods 625 ( semi-volatiles ) and 608 (pesticides ) <br /> should be included initially and then on an annual <br /> basis . The State also requested Sharpe to include <br /> funds within the contract which will allow confir- <br /> mation sampling, addition of wells , and increased <br /> frequency of sampling if needed. <br /> Sharpe responded that they did not feel that 602 <br /> analysis is justified but would agree to all the other <br /> analyses . The State agreed to again review the data <br /> and confirm the request for this analysis. <br />