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Sent By: RWOCB; . Aug-24-0 7:28AM; Page 3/4 <br /> .` California Regional Water Quality Control Board <br /> iU Central Valley Region a I <br /> Steven T.Butter,Chair <br /> Winston H.Hiclwx Gray Darin <br /> S'ecnlaryJrx Sacramento Main Office Governor <br /> Envtrol Ialemet Address: http://www,swrcbca.gov/-nvgch5 <br /> ('rolection ction 3445 Rouker Road,Suite A.Sacramento,California 95827-3003 <br /> Phonc(9 16)255-3000•PAX(916)2$5-3015 <br /> 24 August 2000 <br /> Certified Mail Certified Mail <br /> 7000 1670 0000 6997 4754 7000 1670 0000 6997 4730 <br /> Mr. Bob Boust Mr. Ed Koberstein <br /> Unocal DBGIAMG Montgomery Ward <br /> 8788 Elk Grove 1331 South Harbor <br /> Building 3, Suite 15 Fullerton, CA 92632 <br /> Elk Grove, CA 95624 <br /> ROBINHOOD IRRIGATION WELL,SAN JOAQUIN DELTA COLLEGE,5151 PACIFIC <br /> AVENUE,STOCKTON <br /> On Monday, 21 August 2000, the Robinhood Irrigation Well (RIW) was taken out of service as the <br /> result of an Identified impact by petroleum hydrocarbon contamination. The RIW was the sole source <br /> for irrigation of the San Joaquin Delta College (Delta) campus, and was utilized for about 13 hours out <br /> of every 24-hour period at an average pump rate of 550 gallons per minute. <br /> Based on review of our files for your respective unauthorized releases located at 5606 Pacific Avenue <br /> (Unocal) and 5400 Pacific Avenue (Montgomery Ward),your sites clearly appear to be, either <br /> individually or as a commingled plume,the source of the petroleum contamination found in the RIW. <br /> Additional investigative data will be required to demonstrate that either of the two sites is solely <br /> responsible. At this time, you are both considered jointly responsible for all activities necessary to <br /> investigate and analyze the effects of the contamination identified in the RIW, and all other actions as <br /> necessary to abate the effects of the contamination, which includes the replacement of an equivalent <br /> alternative water source. <br /> Regional Board staff has met with the appropriate Delta Staff(environmental, administrative and <br /> facilities), and San Joaquin County Environmental Health Division staff to discuss alternatives to this <br /> problem. The result is both a short term alternative and a more permanent long term solution. On the <br /> short term, connection to city supplied water is the quickest,cost-effective approach that appears <br /> feasible. However, for the long term, a new well has been discussed as the most feasibly cost--effective <br /> approach. As you are aware, a meeting has been planned for Tuesday, 29 August 2000, to be held at the <br /> Delta administrative office at 9:00 AM for further discussion and action. Delta staff has already <br /> implemented partial city water connection, at their expense, and are determining the necessary additional <br /> equipment, supplies and costs associated with attempting to obtain sufficient volume to replace the <br /> off-line RIW. <br /> California Environmental Protection Agency <br /> 0 Reeyeled Paper <br />