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9 <br /> Michael J. Infurna, Jr., Senior REHS Project 0805- 140 . 003 <br /> May 4, 1998 <br /> Page 3 <br /> (0.050-inch) slotted screens and the annulus is filled with pea gravels instead of the <br /> customary 0.020-inch slot and sand used for monitoring wells. These vapor extraction <br /> wells were not designed to have volumes of water purged from them, as the screen and <br /> annulus will not prevent fine-grained materials from entering the well screen and silting <br /> up the wells and the well annuluses, which will render the well useless for the future <br /> vapor extraction planned as a remedial measure to be implemented for the site. <br /> Regarding your request to install a new set of monitoring wells with screened intervals <br /> which intersect the groundwater interface at the time the wells are built, we request you <br /> suspend or postpone this particular request as we are in the process of preparing <br /> workscopes for additional on-site work with emphasis on air-sparging and vapor <br /> extraction as remedial methods for the site. As the site is placed into active remediation <br /> and cleanup progresses, we will re-visit the placement of additional wells (provided <br /> water levels are still high) as we attempt to close the site. <br /> As for your comments concerning the faxed Fourth Quarter 1997 Monitoring Report, the <br /> following applies: <br /> — We sent the original copy of the Fourth Quarter Monitoring Report to your <br /> agency in care of Mary Meays (formerly the caseworker for this site) on <br /> February 5, 1998, via U.S. Mail, as is proper protocol. <br /> Per your telephone conversations and requests to Jay Johnson here at our <br /> offices, you were given the courtesy of being sent the faxed copy of the <br /> Fourth Quarter 1997 Report on April 1, 1998, as you could not find the copy <br /> we previously mailed to Ms. Meays . <br /> I <br /> We understand you have since found the originally mailed copy of the <br /> Fourth Quarter 1997 Monitoring Report based on a telephone message from <br /> Margaret Lagorio of your office. <br /> We understand this type of "submittal' (a 41-page fax) is not acceptable under normal <br /> circumstances and had you not specifically requested the report to be faxed to your <br /> office, it would not have been sent in that manner. <br /> SACW:\PJO\0805\08051400.3GS-98/pzusmer:l <br />