WAC 173-351-415   Groundwater reporting.  (1) The annual report shall be included with the facility annual report as required in WAC 173-351-200(11) and shall be on forms developed by the department which will request the following information:

     (a) A brief summary of statistical results and/or any statistical trends including any findings of any statistical increases for the year;

     (b) A brief summary of groundwater flow rate and direction for the year, noting any trends or changes;

     (c) A Xerox copy of all potentiometric surface maps developed for each quarter or approved semi-annual period; and

     (d) A summary geochemical evaluation noting any changes or trends in the cation-anion balances, Trilinear diagrams and general water chemistry for each well.

     (2) A quarterly groundwater report shall be submitted to the jurisdictional health department and the department no later than sixty days after the receipt of the quarterly analytical data and shall include all of the following:

     (a) All groundwater monitoring data for the sampling period;

     (b) All statistical calculations and summaries;

     (c) Notification of any statistical increase and concentrations above MCL's;

     (d) Static water level readings for each monitoring well for each sampling event;

     (e) Potentiometric surface elevation maps depicting groundwater flow rate and direction;

     (f) Cation-anion balances and Trilinear diagrams; and

     (g) Leachate analyses.



[Statutory Authority: Chapter 70.95 RCW and 40 CFR 258. 93-22-016, § 173-351-415, filed 10/26/93, effective 11/26/93.]