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I EL No - Jul 1�) 2J NO UZU f' Ui ' D MEM 4 R A N U M ' CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD • CENTRAL VALLEY REGION 3443 Routier Road, Suite A Phone (916)255-3000 ' Sacramento, Caldomia 95827-3098 CALNET 8-494-3000 TO. Technical Staff FROM Jon B Marshack ' Fresno.Redding and Senior Environmental Spec ialnt Sacramento Offices Environinentalflmhnical Support Unit ' DATE, 17 May 1995 SIGNATURE. - - " (updates and replaces memoranda dated 3/26190, 1/14/91, 716/92, 5113193, and 1/18/95) SUBJECT BENEFICIAL USE-PROTECTIVE WATER QUALITY LIMITS FOR ' COMPONENTS OF PETROLEUM-BASED FUELS ' A significant amount of our work involves the assessment and mitigation of petroleum-based fuel spills into soil and water Various water quality criteria have been cited by star in determining whether beneficial uses have been impaired or threatened by such spills In an effort to achieve ' uniformity in the use of numerical water quality limits for this purpose and to bring to your attention the Wide range of available and relevant criteria.I offer the list on the back of this memorandum Thee values come from the staff report A Compilation of Water Quality Coals, M May 1993 edition, updated with more recent Information These limits are intended to he applicable to the protec.lion vi existing or potential sources of drinking water Sources of drinking water are surface and ground watery which have the bene-ficial u%c of municipal and domestic supply (ML1N), as designated in the applicable Water Quality Control Plan (Baso Plan) or the State Water Board's "Source%cel Drinking Water" Policy, Ke%olution No 88-63 Several of the recommended values are based on the taste and odor which these chemicals can impart to water ror these chemicals, impacts on the palatability of the water occurs at lowet concentrations than those which cause health ettects 1-able- and odor-related criteria are applicable, since both health el lefts and Palatability are relevant to the assessment of beneficial use protection Specifically, the Hain flans contain water quality objectives prohibiting adverse taste,, or odors in ground or surface waters that have the "MUN"beneficial use designation You will notice that certain of the recommended limits are lower than applicable analytical detection limits in water in thc%c cx%c%,the detection of any amount of these constituents in water indicate,%that benefu tai uses hive been impaired In addition, an assessment of existing and potential water quality impacts must take into account State Water Hoard Resolution Nos 68-16, Statement of Policy With Respect to Maintaining High Quality of Waters in C'alifornua, and 92-49, Policies and Procedures for Investigation and Cleanup and Abatement of Discharges Under Water Code Section 13304 Requiring cleanup to technologically and economically achicvablc levels which are lower than beneficial use-protective limit%,would be consistent with these policies for water quality control Pool It'brand tax tranumiIlal memo 7671 Kat P-9e$ . Frown 1 dr 6i4c�C Co P F Dept Phone