ARCHIVED REPORTS_XR0007862 - Laserfiche WebLink

Home Browse Search

1 e SMITH at concentrations less than 0 048 and TPHg at 1 1 at a depth of 70 feet only Bonng B- 18 contained benzene at concentrations less than 0 016 ppm from 40 to 50 5 feet bgs Groundwater Monitoring Activities ' In regards to the statement that the water table has risen above the top of the well screens in monitoring wells MW-1, MW-2 and MW-3 during recent sampling events, there have been a number of quarters for which groundwater has been below the top of the well screen during sampling events The analytical results during these events were nondetect for TPHg and BTEX Specifically, the groundwater level in monitoring well MW-1 was below the top of the well screen when samples were collected on March 17, September 9, and December 29, 1994 ' Similarly, when groundwater samples were collected from monitoring well MW-2 on September 2 and December 27, 1993 and March 17, 1994, the groundwater level was below the top of the well screen The water table in monitoring well MW-3 has been below the well screen from September 1990 until June 1995 It does not appear cost effective to pump groundwater at a high enough rate for an extended ' period of time to drawdown the water table to a level below the top of screen in these wells Based on the recharge rate in the wells from previous sampling events, it appears that attempting such pumping would result in the storage of possibly hundreds or thousands of gallons of tgroundwater The second quarter monitoring event was completed prior to receipt of your recommendation for analyzing groundwater samples for lead and therefore was not performed Second quarter results will be submitted in a separate report ' If you have any questions regarding this matter or require additional information please contact our office at (209) 838-3507 ' Very Truly Yours, Smith Environmental Technologies Corp William Madison ' Staff Geologist ' J ne Homsey, P E CA Registered Engineer No C47410 ' JH/ Attachments ' cc Beth Thayer, RWQCB Ann Macdonald, Coca-Cola Enterprises, Inc Reginald Prime, Coca-Cola Enterprises, Inc ' N 10S40061LFT rEWADDWKPL LTR 3