SITE INFORMATION AND CORRESPONDENCE

Home Browse Search

MONITORING AND REPORTING PRAM NO. R5-2010-R5010 • - 3 - PIPELINE 3 - PIPELINE CONSTRUCTION DEWATERING CITY OF STOCKTON SAN JOAQUIN COUNTY LAND APPLICATION AREA MONITORING The Discharger shall begin monitoring the land application areas upon initiation of dewatered groundwater discharge to them. Monitoring shall consist of visual inspection of the land application areas on a weekly basis for the presence of objectionable odors, mosquitoes, and/or unexpected plant growth. GROUNDWATER MONITORING The Discharger shall monitor available groundwater monitoring wells as needed to confirm the infiltration trench is maintaining a hydraulic barrier between the Herman and Helen's MTBE groundwater plume and the dewatering activities. Monitoring shall be conducted whenever groundwater dewatering is occurring within 1,000 feet of the right angle corner of the pipeline (near Herman and Helen's Marina). The approximate area is shown on Attachment A (included with the Notice of Applicability). Constituent Units Sample Type Sample Reporting Frequency Frequency Groundwater Elevation 0.1 feet Measurement Daily Monthly Flow Direction ' fUft Calculation Daily Monthly Vertical Gradient ft/ft Calculation Daily Monthly If groundwater elevation indicates an effective hydraulic barrier does not exist (as defined by a groundwater flow direction to the west in wells in close proximity to the western side of the barrier), the Discharger shall notify the Central Valley Water Board as soon as practicable and shall provide written notification within 24-hours. The notification shall include a plan to reestablish hydraulic control at the infiltration trench. REPORTING In reporting monitoring data, the Discharger shall arrange the data in tabular form so that the date, sample type (e.g., effluent, pond, etc.), and reported result are readily discernible. The data shall be summarized in such a manner to clearly illustrate compliance with the NOA and spatial or temporal trends, as applicable. The results of any monitoring done more frequently than required, or chemical analysis not required by the Monitoring and Reporting Program, shall be reported to the Central Valley Regional Water Quality Control Board (Central Valley Water Board). A. Monthly Monitoring Reports Monthly reports shall be submitted to the Central Valley Water Board on the first day of the second month after the month ends (e.g. the January report is due by 1 March). The reports shall bear the certification and signature of the Discharger's authorized representative. At a minimum, the quarterly reports shall include: