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LIVE OAK 6EO ENVIRONMENTAL Surface A Subsurface Contamination Report - The Arbor Mobile Rome Park, Acampo June 30, 2009 incident of sewage overflow since PERC began monitoring the system in October (personal communication,June 30,2009). 6.0 SITE DOCUMENTS a, ti.T Environmental Health Department Records The EHD was contacted regarding the Site address of 19690 North Highway 99. LOGE reviewed records on file for the Site at the EHD on June 18,2009. The following incident reports were identified: • August 31, 1999 report of a drug lab discovered at unit #4. Staff of the San Joaquin County Sheriff's Department inspected the house and determined that there were no signs of contamination or disposal to the sewage system or ground. • June 21, 2008 report of surfacing sewage near unit #72. Surfacing sewage was reported as a "periodic problem." The EHD file also included copies of the Regional Board documentation for the Site. The Regional Board issued Waste Discharge Requirements (WDRs) for the wastewater system at the Site on June 12, 2003. Apparently the WDRs were issued in response to system malfunctions in 2002. According to the WDRs, the system utilizes a package treatment plant, 60 seepage pits, and a gravelless leachfield_ A Monitoring and Reporting Program (MRP) was also adopted for the Site by the Regional Board, including monitoring the influent prior to treatment by the package plant, monitoring the effluent prior to discharge to the pits or leachfield, visual inspection, and groundwater monitoring. Two Notices of Violation issued by the Regional Board were also on file. The first, from 2003, was for elevated levels of Total Suspended Solids and Biological Oxygen Demand in the effluent. The second, from 2004, was for wastewater pooled on the ground surface and failure to report the incident. Beyond a review of the file for citations, a determination as to whether the Site is in compliance with Regional Board requirements is beyond the scope of this report. LOGE searched the EHD well and septic permit files for the Site on June 9, 2009. The following permits were found: • 1983 permit to add six 1,600-gallon septic tanks to the existing system as polishing tanks and 12 seepage pits three feet in diameter by 25 feet deep. The permit depicts three preexisting tanks and 48 preexisting seepage pits. • 1988 well destruction permit. • 1988 well replacement permit. • 2000 permit for repair to well. • 2001 permit for addition of 4-foot by 48-foot leach line to existing septic system. • 2007 permit for addition of eight 60-inch wide by 25-foot deep seepage pits. i 6 w t