SITE INFORMATION AND CORRESPONDENCE

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" 2085 E. Fremont Street - page 2 of 3 define the lateral extent of the contamination in MW-4. Therefore , before the target depths can be proposed or any wells installed , the actual depth of MW4 must be determined . Following this , at least one well to investigate the vertical extent of the contamination documented in MW-4 must be installed . This well should be located near to or slightly down gradient from MW-4, and the boring for this well should be continuously cored below 90 feet bsg to identify an appropriate permeable water-bearing unit in which to set a discrete screen interval . In previous correspondence SJC/EHD provided WHF with copy of the log for boring CPT-11 , located at the northeast corner of Fremont Street and Laurel Street. Review of that log shows a sandy interval extending from approximately 105-124 feet bsg . Review of log CPT-7, which was located near the northwest corner of Fremont Street and Watts Ave. shows a sandy interval extending from approximately 109-140 feet bsg . These CPT logs also show a thin sandy silt interval between 85 and 90 feet bsg on the west (CPT-11 ) becoming a thin sand on the east (CPT-7). The following scope of work is approved for implementation : 1 . Immediately schedule the re-development of MW4 , and report to SJC/EHD what the actual total depth of this well is determined to be. This information is due for submittal to SJC/EHD no later than July 16 , 2004. SJC/EHD must be notified at least 48 hours prior to the re-development. 2 . As proposed , one deep monitoring well will be installed near MW-4 to investigate the Vertical extent of the groundwater contamination . The boring for the well should be continuously cored from 90- 125 feet bsg to identify the most appropriate water-bearing unit in which to set a discrete 5-foot screen interval . Soil samples for analysis must be collected from depths below 100 feet bsg . 3. Three deep monitoring wells will be installed to investigate and monitor the lateral extent of the contaminant plume documented in monitoring well MW-4 . Borings for these wells should be continuously cored starting at 70 feet bsg , to total depth , to identify permeable water bearing zones near the depth of MW-4 in which to set the discrete 5400t screen intervals. One of the wells should be located up gradient of MW-4 , perhaps near MW-2 , or near the proposed well location on the west side of Laurel Street; the other two should be located near the 'proposed deep boring/deep monitoring well ' locations depicted on Figure 3, to the east of the former dispenser island canopy. 4 . Four shallow wells designed to intercept first groundwater will be installed to investigate the lateral extent of the plume at this depth . As current depth to water is approximately 50 feet bsg , the screen interval of these wells should begin at 45 feet bsg . The well proposed for the west side of Laurel Street should be installed upgradient to MW-2. 5 . Following installation and proper development of the proposed wells, routine quarterly groundwater monitoring and sampling must be initiated , and must continue until directed otherwise by SJC/EHD . This will most likely continue for more than one year, exceeding the length of time proposed by WHF. The deadline for the installation of these monitoring wells is August 27, 2004 . The deadline for submittal of a report of findings following the well installations is 60 days following completion of the work. As you have been repeatedly out of compliance with regulatory directives, failure to have the work completed by this deadline will result in referral of this site to the Regional Water Quality Control Board , Central Valley Region , or the San Joaquin County District Attorneys Office for enforcement action .