SITE INFORMATION AND CORRESPONDENCE

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Chuck Carmel Page 2 2. The off-site investigation which had been approved and included the installation of a monitoring well to the west of the site and a soil boring to the south of the site,was to proceed once encroachment agreements had been obtained. PHS/EHD received correspondence, dated March 17, 1993 and prepared by BC, which requested the California Department of Transportation's (CalTrans) permission to drill a monitoring well on their property located to the west of the site. PHS/EHD discussed with CalTrans on May 5, 1993, the necessity of this well. PHS/EHD is unclear of the status of this request since PHSJEHD has not received copies of correspondence from CalTrans. PHS/EHD has not received copies of correspondence that would indicate negotiations have been initiated between ARCO and the property owner to the south of the site. However, PHS/EHD has received two permit applications and a $178 check for both the proposed off-site investigations. The check is being returned (BC enclosure) because the 90 day holding period has been exceeded. Please provide an update on the status of these projects and submit a check i for $178 once encroachments agreements have been obtained. 3. A work plan would be submitted by May 31, 1993,for the installation of a soil remediation system consisting of vapor extraction and air sparge wells and for the installation of an additional on-site monitoring well which was to be located in the north-west corner of the site. A work plan was submitted by May 31, 1993, although it was incomplete. The "Work Plan for Additional Installation of Soil Vapor Extraction, Air Sparge Wells and Monitoring Wells", dated May 14, 1993 and prepared by BC included information regarding the location of air sparge wells and the location and construction of vapor extraction wells. The work plan did not provide details of the construction of the air sparge wells nor did it locate the monitoring wells eluded to therein. The statement included in the work plan '"The final location and construction of these monitoring wells will be dependent on site access and will be determined at a later time" is unclear, when at the March 30, 1993 it was determined that a well would be located in the north-west corner of the site.