ARCHIVED REPORTS_XR0007876 - Laserfiche WebLink

Home Browse Search

Second Quarter 1993 Morutonng Report Coca-Cola Enterpnses-West Project No 54006 02 Page 4 ' respectively The benzene concentration exceeded the MCL for drinking water of 1 0 ppb. The toluene, ethylbenzene, and xylene concentrations are below the State ALs and ' MCLs 0 The concentration of TPHD continues to remain nondetectable in downgradient well ' MW-6 The concentration of TPHG increased slightly from 120 ppb to 130 ppb ' CONCLUSIONS Based on the results of this quarterly monitoring and previous work performed at the site, ' RESNA concludes that the TPHG and TPHD decreased or remained the same, and BTEX concentrations in groundwater have increased slightly since the last monitoring episode in March 1993 The majority of gasoline hydrocarbons had been consistently detected in the vicinity 1 directly downgradient from the former tank pit (in well MW-1) Wells MW-2 and MW-6 located cross-gradient from the former tank pit excavation have shown a slight increase in detectable levels of gasoline hydrocarbons This may be due to the continued rise in groundwater elevations ' RECOMMENDATIONS Based upon the findings and conclusions of this and previous groundwater monitoring episodes, ' RESNA recommends continued quarterly monitoring consisting of measuring water levels in wells MW-1 through MW-6 and collecting samples from wells MW-1, MW-2, and MW-6 ' Water samples collected during monitoring should be submitted for laboratory analysis of TPHG, TPHD, and BTEX using EPA methods 503018015/8020 ' SCHEDULE ' The next quarterly monitoring episode is scheduled for September 1993 with the quarterly monitoring report submitted in October 1993 Routine well maintenance and inspection will be performed as necessary during site visits 1 DISTRIBUTION Copies of this report will be forwarded to the following regulatory agencies involved in this project 2QMR1993 PUL I