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'Letter to Mr.Ross Atkinson • . <br /> Regional Water Quality Control Board <br /> February 20,2002 <br /> Page 4 of 4 <br /> ✓ Of the total metals detected in groundwater,As was above the MCL at MW-1 and MW-5 in December <br /> 2000 and January 2001. In December 2000,total As and Cr was greater then the respective MCLS at MW- <br /> 2. The concentration of As and Cr at MW-2 decreased in January 2001 to levels below the MCLS. <br /> ✓ Of the dissolved metals detected in groundwater,only As was greater then the MCL(10 pg/L) during the <br /> December 2000 sampling event at MW-5. The concentration of As at MW-5 decreased in January 2001 to <br /> a level below the MCL. Arsenic is not a contaminant associated with the pad materials. <br /> Planned Action <br /> Based on the information developed in the investigation,MonierLifetile intends to remove the pad and <br /> approximately 1-3 foot of underlying soils from the pad area. <br /> The monitoring well in the pad,will be removed and properly closed prior to the pad removal. If the remaining <br /> monitoring wells do not interfere with the removal action,they will be left in place and another round of <br /> monitoring performed prior to a decision being made regarding removal of the wells. <br /> Removal of the pad and underlying soils will be using typical earthmoving equipment. Material will be loaded onsite <br /> into trucks and transported to a Class II Landfill for disposal. <br /> Schedule <br /> Due to the limited timeframe under the order to remove the material, the following schedule is anticipated: <br /> Task Date <br /> Submit Request for February 15,2002 <br /> Supervision/Approval of planned <br /> Action <br /> Remove Monitoring Well in Pad March 7-15,2002 <br /> Receive Approval from CV-RWQB March 15,2002 <br /> Remove Pad and 1 foot of underlying March 18-29,2002 <br /> soil/fill <br /> Provide Notification to District April 15,2002 <br /> Attorney Requirement Met <br /> We appreciate your time in evaluating this issue and look forward to receiving your approval. If you have any <br /> questions or wish to discuss this matter further,please contact me at 678-491-4911. <br /> Respectfully Yours, <br /> MonierI7ifetile LLC <br /> ✓��l�lr'�vi/��E�� <br /> Sandra L. Glenn,P.E. <br /> Environmental Manager <br /> cc.: Jim Thripp/Irvine <br /> Norm Klingman/Lathrop <br /> Noel Vila/French Camp <br /> Jeff Pizzagoni/Lathrop <br />