Laserfiche WebLink
-E Or CA7 IFORNIA.CALI°ORNIA ENViRONI$N1AL PROTEOnON AGENCY PETE WILSON.Govamd <br /> ATE WATER RESOURCES CONTROL BOARD y. <br /> R.soNocRsoN Bucowc <br /> i St REFr q <br /> .BOX 100 it <br /> A -?,*Io.MIFORNIA VS812-C100 <br /> 6) 657-0941 <br /> .6) 657-0932 (FAX) <br /> All Regional Water Board Chairpersons 1995 <br /> Al Regional Water Board Rxccurive. OfGc rs <br /> All LOP Agency Directors <br /> LAWRF.NCIi LIVERMORF NATIONAL I ABOR.ATORY (LI,NL RLPORT ON LEAKING <br /> UNDERGROUND STORAGF TANK (UST) CI FANUP <br /> In October 1995, the LLNI, presented to the State Water Resources Control Board (SWRCB) its final <br /> report, Recommendations to Im rove the Cleanup Yrznccsa for California's Leaking Underground Fucl <br /> nks. The I.LNL team found that the impacts to the environment from leaking USTs were not as <br /> severe as we once thought. The report also presenLs a convincing argument that passive <br /> bioremediation should be considered as the. Primary remediation tool in most cases on,"- the fuel leak <br /> source has brn removed. <br /> The LLNL report hes also been presented to the SWRCH's SB 1764 Advisory Committee which will, <br /> in turn, provide rceommcndations to the SWRC13 by the end of January 1996. The SWRC13 may <br /> choose to implement reeotninendstions from the I J.NL report and the SB 1764 Advisory Committee <br /> through revisions to SWRCB Resolution 92-49 in early 1996. <br /> In the interim and in light of the findings and recommendations in the LI.NL report, we believe <br /> cleanup oversight agencies should proceed aggressively to close low risk soil uttly cases. For cases <br /> greeting low.risk groundwater (for instance, shxllnv., groundwater with maximum depth to water less <br /> than 50 feet and no drinking wrtcr wells scrcenetl in the sha3low groundwater zone within 250 feet of <br /> the leak) we recommend that active remediation lx: icplaced with monitoring to determine if the fuel <br /> leak plume is stable.. Obviously good judgment is required in all of these decisions. IIowever, that <br /> judgment should now include knowledge provided by the I.I.NL report. <br /> What l pmpose.to you is not in any way inuonsistcnt wi!h existing policies'or rcgulatiuns How%ever, <br /> it does represent a maioi departure from how we have viewed the threat from leaking USTs. Thii; <br /> gtiidanee is consistent with the results b( a discussion of this.subject among the State Board Chair and <br /> Regional Board Chairs on December 5, 1995. -.if you have any questions on this mater piease call_ , <br /> Mr. James Giannopoulos, our manager of the underground storage tank program."at (916) 227-1320. <br /> Sincerely, <br /> Walt Pettit <br /> Fxeeutive Director <br /> ec: All Regional Water BoardILOP UST. Program Managers <br />