ARCHIVED REPORTS XR0010687 - Laserfiche WebLink

Home Browse Search

1 it could indicate that the contamination in this well is possibly from the former BP Station ' on Mr Morita's property MtBE was detected in BM-1 and BM-3 only BM 1 is located in the old tank pit and BM-3 ' is located upgradient of the old tank pit We believe this MtBE is related to gasoline coming from the ARCO station We tested the water in BM-12 for oxygenates and the results are shown in Table 3B No oxygenates were found ' Dissolved oxygen levels were recorded this quarter at this site The levels were measured with a calibrated YSI model 51 B meter by placing the sensor 5 feet below the surface of the water table after the bailing of the wells The measured levels are shown ' on Table 3A The readings of dissolved oxygen are between 2 3 at well BM-8 and 6 2 at well BM-2 The levels appear to be stabilizing across the site VAPOR EXTRACTION SYSTEM ' The site has been under remediation since July 1997 A total of 42,549 pounds of gasoline has been removed since the beginning of this protect ' The vapor extraction was shut down on February 5, 1999 because no BTEX chemical was being recovered This quarter we drilled vapor extraction well VW-7 and found soil contamination in this well We expect to restart the vapor extraction system along with air �. sparging in the old tank pit this quarter Conclusions We will continue to monitor this site The next monitoring event will take place in October 1999 We believe that Morita's property has not been investigated to a point where the path of their contamination is defined We believe that this should be investigated and the results shown to us rAttached is a Hazardous Waste Manifest showing that the purged water was disposed of properly Yours truly, rRG n Cussen 4<`'',o�N H C�ss`2�'` #6506 6506 ' Enclosures 5 Tables orCA11Foe�P 4 Figures 2 Laboratory Reports and Chain of Custody's 12 Sample Sheets I1 Manifest