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Revised Monitoring and Re,-Ring Program No. 93-100 9 Lawrence Livermore National Laboratory Site 300- Pit 1 San Joaquin County error in the laboratory. Retests are used when the initial measurement exceeds the SL. If the initial measurement and either or both of the retests exceeds the SL, then the results are considered to be a "statistically significant evidence of a release." REPORTING 18. When reporting the data, the Discharger shall arrange the information in tabular form so that the date, the constituents, and the concentrations are readily discernible. The data shall be summarized in such a manner as to illustrate clearly the compliance with this MRP. 19. As required by the California Business and Professions Code Sections 6735, 7835, and 7835.1, all reports shall be prepared by a registered professional engineer or geologist or their subordinate and signed by the registered professional. 20. Quarterly electronic reports, which conform to the requirements of the California Code of Regulations, Title 23, Division 3, Chapter 30, shall be submitted electronically over the internet to the State Water Board Geotracker database system by the 1st day of the third month following the end of each calendar quarter (i.e., by 1 March, 1 June, 1 September, and 1 December), until such time as the Executive Officer determines that the reports are no longer necessary: 21. Quarterly paper copy reports shall be submitted to the Central Valley Water Board by the 1st day of the third month following the end of each calendar quarter (i.e., by 1 March, 1 June, 1 September, and 1 December) until such time as the Executive Officer determines that the reports are no longer necessary. Each quarterly report shall include the following minimum information: (a) A description and discussion of the groundwater sampling event and results, including groundwater elevations in the wells, how and when samples were collected, and if any new contaminant release were detected. (b) A discussion of any changes in groundwater quality that are attributed to a source other than Pit 1. The discussion must include an identification of the source, what remedial actions are being undertaken, and the evidence which is used to identify the source. (c) Field logs that contain, at a minimum, water quality parameters measured before, during, and after purging, method of purging, depth of water, volume of water purged, etc.