COMPLIANCE INFO_1991-1997 - Laserfiche WebLink

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04/07/95 Drainage & erosion control, explosive gas As can be seen by noting that the last violation was dated in April, the City has addressed and resolved all of the issues raised during Local Enforcement Agency inspections. A groundwater flow map is also attached. It shows that flow is in a northeasterly direction at a velocity of 2.4 to 38.5 feet per year. The locations of the groundwater wells used for sampling and determination of flow are also shown on the flow map. In addition, the detailed sampling procedure and method of purging are attached as required. With respect to run-on/run-off controls, the City completed a perimeter ditch around the landfill per the sites Stormwater Pollution Prevention Plan. The ditch leads to a retention basin onsite. A drawing from the Plan showing the system is attached. During the winter rains at the end of 1995, it became evident that portions of the ditch did not function properly. A review of the system is underway. The next issue concerns the implementation of the Corrective Action Program. Provision No. 5 of Waste Discharge Requirements Order No. 94-303, requires the City to implement the Corrective Action Program (CAP) approved by Regional Board staff on June 10, 1991. The City had great difficulty keeping the CAP operational in 1995. The "pump and treat" system was plagued with many startup problems that prevented continuous operation. By the end of the year, however, nearly all these problems had been corrected. Significant problems that caused down time during the year are summarized below. First Quarter Operations: The air emissions duct heater would not work properly because of an electrical component problem. The air stripper blower motor also failed and had to be replaced. In addition, electrical problems with the Remote Telemetry Unit (RTU) contributed to down time this quarter. Second Quarter Operations: A water line between the two extraction wells developed a leak and had to be repaired. Also, the submersible pump for Extraction Well No. 2 failed and had to be replaced. Third Quarter Operations: Hydrochloric acid vapors leaking from the acid tank became a serious problem this quarter. This ultimately resulted in the City having to install a vapor scrubbing unit to handle vapor emissions. Both extraction well casings had to be raised to comply with San Joaquin County Environmental Health requirements. The concrete boxes and lids which house the well piping, valves, and meters also had to be modified to accommodate the raised well heads. RTU program problems also triggered many shut downs this quarter. Fourth Quarter Operations: More electrical problems with the duct heater occurred this quarter. Also, a loss of power to the RTU control panel occurred.