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Former Unocal #6981 4 13 April 2017 Stockton, San Joaquin County 20. California Well Standardsi state that a monitoring well is considered abandoned or permanently inactive if it has not been used for one year, unless the owner demonstrates intention to use the well again. The wells at the Site are considered abandoned or inactive. 21. California Well Standards state that an inactive or abandoned monitoring well must be properly destroyed to: a. Ensure the quality of groundwater is protected; and b. Eliminate a possible physical hazard to humans and animals. 22.The Low-Threat Closure Policy states that all wells and borings installed for the purpose of investigating, remediating, or monitoring the unauthorized release must be properly destroyed before a case is closed under the Low-Threat Closure Policy. 23. Health and Safety Code section 115700, subdivision (d) defines a "permanently inactive well" as "a well that has not been used for a period of one year, unless the person owning land in fee simple or in possession thereof under lease or contract of sale demonstrates an intent for future use for water supply, groundwater recharge, drainage, or groundwater level control, heating or cooling, cathodic protection, groundwater monitoring, or related uses." 24.Water Code section 13267 (b)(1) states that: In conducting an investigation the regional board may require that any person who has discharged, discharges, or is suspected of having discharged or, discharging, or who proposes to discharge waste within its region shall furnish, under penalty of perjury, technical or monitoring program reports which the regional board requires. The burden, including costs, of these reports shall bear a reasonable relationship to the need for the report and the benefits to be obtained from the reports. In requiring those reports, the regional board shall provide the person with a written explanation with regard to the need for the reports, and shall identify the evidence that supports requiring that person to provide the reports. The technical reports required by this Order are necessary to ensure the protection of human health and reasonable progress toward closure of this case. The Site wells were last monitored on 17 January 2012, are inactive, and are a potential conduit for pollutants to migrate from above ground to below ground. The burden, including costs, for regularly reporting progress, is justified due to the ongoing concerns articulated in this Order. REQUIRED ACTIONS IT IS HEREBY ORDERED that, pursuant to Water Code section 13267, the Responsible Party is required to: 1 Publicly available at http://www.water.ca.gov/pubs/groundwater/water well standards bulletin 74- 81 /ca well standards bulletin74-81 1981.pdf, as supplemented by Department of Water Resources Bulletin 74-90, publicly available at http://www.water.ca.gov/pubs/groundwater/water well standards bulletin 74-90 /ca well standards bulletin74- 90 1991.pdf.