SITE INFORMATION AND CORRESPONDENCE

Home Browse Search

------ ----------- kn KLEINFELDER hI_ SEP 26 P11 2: 36 File No. 24-221076-HOl September 19, 1994 Mr. John Ewing Leprino Foods Facility Post Office Box 173400 Denver, Colorado 80217-3400 Subject: ADDENDUM MONITORING WELL INSTALLATION WORKPLAN DATED SEPTEMBER 1, 1994 Dear Mr. Ewing: It has come to our attention than an error was been made in our recently issued "Monitoring Well Installation Workplan dated September 1, 1994. No changes were made to the well locations noted on Plate 2. However, clarifications were necessary to two paragraphs. Page 8, Task H02, Paragraphs 1 and 2 should read as follows: Task H02 -Drilling of Nine Soil Borings and Installation of Nine Monitoring Wells Nine (9) soil borings will be advanced to a maximum depth of approximately 35 feet below surface grade (bsg)to further define the site-specific groundwater gradient and to get an indication of the possible presence and/or extent of contaminants in the groundwater. Each of the nine borings would be placed in areas believed to be beyond the perimeter of the groundwater plume. Three of the seven borings will be drilled off-site. Two (2) of the on-site borings would be advanced in an area near GP-4. The purpose of the borings would be to collect soil samples from near the center of the plume and for subsequent construction of groundwater monitoring wells with short screen intervals for use in delineating the vertical extent of diesel fuel in groundwater near the center of the plume. One of the wells would have a total depth of 18 feet and would be screened from 8 to 18 feet below grade. The other well would have a total well depth of 33 feet and would be screened from 28 to 33 feet below grade. Copyright 1994 Kleinfelder, Inc. Page 1 of 2 KLEINFELDER 2825 Fast Myrtle Street,Stockton,CA 95205-4794 (209)948.1345