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• Residence, 931 S. Oro St., approximately 100 feet southwest of the Site, Complaints list. A 2013 complaint alleged that "motor oil coming out of bathroom & kitchen sink. Oily liquid in holding tank of the toilet." Live Oak reviewed records on file for this facility at the San Joaquin County Environmental Health Department. It appears that samples were collected from the toilet tank and outdoor spigot at this residence under the oversight of the Central Valley Regional Water Quality Control Board, and the grease present was believed to be vegetable oil. A complaint from 2014 was also on file, in which the resident complained that black dirt originating at a nearby remediation site was present in her yard and bubbled with white foam when water was added. It does not appear that investigation was conducted to address this complaint. A complaint from 2015 stated that "neighbor digs hole in yard and pours gasoline into the holes." The Environmental Health Department collected soil samples and detected paint thinner and gasoline in the sample from the driveway. The complaint was listed as abated by December of 2016. A complaint from February of 2016 alleged that "there are little tubes that have vapors coming out of them. Complainant states that someone has created a ventilation system under her house and that she is being poisoned." A complaint from April of 2016 alleged "contaminated water and vapor intrusion of MTBE and `hundreds of other chemicals."' Both 2016 complaints have a status of "office abated;" it appears that the resident may have developed a mental illness. Based on the status of the investigations at this property, it appears unlikely that this property has impacted the subject Site. The contamination alleged by the resident would have originated at Jamar Service (discussed above). • Residence, 1024 S. Oro Ave., approximately 60 feet south of the Site, Complaints list. A 1994 complaint alleged that diesel fuel was spilled in front of this house. Live Oak requested to review records on file for this facility at the San Joaquin County Environmental Health Department; no records were provided. Based on the date of the incident and the distance to the Site, it appears unlikely that this incident has impacted the subject Site. Live Oak reviewed the San Joaquin County Environmental Health Department's maps of Nitrate - Land Use Data and DBCP - Land Use Data dated October 2021. Within two miles of the Site, 12 wells were tested for nitrate (Plate 5); nitrate was detected in eight of the wells at concentrations between 0.1 and 5.0 mg/L-N and in one of the wells at a concentration between 5.1 and 10.0 mg/L- N; no nitrate was detected in the remaining three wells. Within two miles of the Site, four wells were tested for dibromochloropropane (DBCP) (Plate 6); no DBCP was detected in any of the wells. LOGE 2251 11