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ARCADIS <br /> Infrastructure, environment, buildings ( ��!I F <br /> \y � ARCADIS <br /> rel 2009 140 Second Street,Ste 200 <br /> Petaluma <br /> Ms. Kathryn Dominic �V'Ro'hJAOENT JI California 94952 <br /> Engineering Geologist ' ;`'' r EALTh <br /> Tel 707.776.0865 <br /> California Regional Water Quality Control Board, Central Valley Region I VIES Fax 707.7 6.08 50 <br /> 11020 Sun Center Drive, Suite 200 www.arcadis-us.com <br /> Rancho Cordova, California 95670-6114 <br /> Subject. <br /> Response to Regional Water Quality Control Board Letter Dated February 11, 2009 <br /> Union Pacific Railroad Company, Former Tracy Maintenance Facility, ENVIRONMENT <br /> 720 East 6th Street, Tracy, San Joaquin County, California <br /> Dear Ms. Dominic: <br /> Date. <br /> The purpose of this letter is to provide comments on the draft Monitoring and July 23, 2009 <br /> Reporting Order(MRO) for the Former Tracy Maintenance Facility. The draft MRO <br /> was transmitted by the California Regional Water Quality Control Board, Central Contact. <br /> Valley Region (RWQCB) on February 11, 2009. This letter was prepared and is Lisa Teague <br /> submitted on behalf of the Union Pacific Railroad Company (UPRR). <br /> Phone: <br /> 707.776.0865 ext 18 <br /> ARCADIS proposes that finalization of the MRO be delayed until collection and <br /> evaluation of the data from the Phase II field investigation (ARCADIS, Phase 11 Field Email <br /> Investigation Work Plan, January 6, 2009). The proposed investigation will generate Lisa.Teague@arcadis-us.com <br /> groundwater data from about 29 HydroPunche borings and from five additional, new <br /> monitoring wells. Much of the proposed data will be in the transition zone where little our ret <br /> to no data is currently available. Therefore, these new data will likely be useful in RC000709.0601.00022 <br /> optimizing the groundwater monitoring program. <br /> Thank you for your consideration of this request. If you have any questions, please <br /> feel free to call me at 707.776.0865 ext. 18. <br /> Sincerely, <br /> ARCADIS <br /> Lisa Teague, PG <br /> Principal Geologist <br /> copies: <br /> Mr. James E. Diel, UPRR (via email) Mr. Scott Davis, ARCADIS (via email) <br /> Mr. Michael J. Infurna, San Joaquin Mr. Brad Koons, ARCADIS (via email) <br /> County Public Health, Stockton <br /> Imagine the result <br />