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• Limited Subsurface Investigation Report — City of Ripon / Madsen Sunrise Dairy, Ripon, California September 30. 2010 USTs were reported as not detected for Total Petroleum Hydrocarbons as gasoline (TPHg) and Benzene, Toluene; Ethylbenzene, and Xylenes (BTEX). Inspection records provided by the SJCEHD show the former fuel UST pit located approximately 100 feet north of 2nd Street and 5 feet west of Stockton Street (presumably 5 feet west of the property line). On November 12, 2009, GR observed the removal of one 12,000 -gallon UST by Speehnan Excavation at the site. No observable holes were noted in the UST. Following UST removal, GA collected soil samples TW -13 and TE -13 at a depth of approximately 13 feet bgs from the beneath each end of the former UST. GR also collected soil sample TM -13 from beneath the tank midpoint at a depth of 13 feet bgs. Soil samples TE -13, TM -13, and TW -13 were analyzed for Total Petroleum Hydrocarbons as diesel (TPHd) by EPA Method modified 8015, for TPHg, BTEX, Methyl tert-Butyl Ether (MtBE), Ethyl tert-Butyl Ether (ETRE), Di -Isopropyl Ether (RIPE), Tert-Amyl Methyl Ether (TAME), and Tert-Butanol (TBA), 1,2-Dichloroethane (1,2- DCA), and Ethylene Dibromide (EDB) by EPA Method 8260B. BTEX, MtBE ETBE, DIPE, TAME, TBA; 1,2 -DCA and EDB were reported as below the laboratory method reporting limits in samples TE -13, TM -13 and TW-13.TPHg was detected in soil sample TW -13 at a concentration of 77 parts per million (ppm) and was reported as below the laboratory method reporting limits in samples TM -13 and TE -13. TPHd was detected in soil sample TW -13 ata concentration of2,000 ppm and was reported as below the laboratory method reporting limits in sample TM -13 and TE -13. 3.0 FIELD WORK Fieldwork was conducted in accordance with GR's Field Methods and Procedures (Appendix A), the GR Health and Safety Plan and the Site Specific Safety Plan dated August 3, 2010. Geoprobes® were advanced under well permit number 60610, issued by the SJCEHD on July 28, 2010 (Appendix B). Underground Service Alert (USA) was notified prior to probing at the site. 3.1 Geoprobe® Advancement On August 5, 2010, a GR geologist observed Gregg Drilling Inc. (C-57 #485165) advance four Geoprobe® soil borings (GP -1 through GP -4). The borings were hand excavated for the fust four feet bgs to insure that no utilities were disturbed. The borings were advanced with a truck -mounted rig utilizing direct push technology. The Geoprobe locations are shown on Figure 3. All Geoprobes® were advanced to 32 feet bgs. Soil sampling for lithologic logging was conducted continuously beginning at four feet bgs and soil samples from selected depths were collected for chemical analysis. The soil samples were handled in accordance with GR's Field Methods and Procedures (Appendix A). The samples were not screened in the field for the presence of volatile organic compounds (VOCs) due to instrument malfunction. The GR geologist prepared logs of the Geoprobes with lithologic descriptions and the depths at which soil and groundwater samples were collected. The logs are presented in Appendix B. 25-948223.1.3