Laserfiche WebLink
1 <br /> 1 <br /> 1.0 INTRODUCTION <br /> 1 <br /> On behalf of the County of San Joaquin (property owner), Ramage Environmental has prepared <br />' this Monâ–ștonng Well Installation and Groundwater Monitoring Report for submittal to the San <br /> Joaquin County Public Health Services Environmental Health Division (PHS/EHD) and the Central <br />' Valley Regional Water Quality Control Board (RWQCB) The scope of work was completed <br /> according to Ramage Environmental's Letter Work Plan, Monrtonng Well Installation and <br /> Groundwater Sampling dated July 16, 2001 On July 18, 2001, PHSIEHD approved the work <br />' plan The work plan approval is included in Appendix A <br />' 1.1 Site Location and Description <br /> The subject property is located at 1810 East Hazelton Avenue in the city of Stockton, California <br />' (Figure 1) The site is an active county motor pool and office complex with a gasoline and diesel <br /> fueling system Currently, the fueling system consists of one gasoline underground storage tank <br />' (UST#1), one diesel tank (UST#2), and two dispenser islands Additionally, three former tanks <br /> (USTs# 3, 4, 6, and 7) were removed, and one former tank (UST#8) was abandoned in place A <br /> municipal irrigation well is located in Stribiey Park, approximately 600 feet north of the fueling <br /> system The locations of this well and the former and existing USTs are shown on Figure 2 <br />' 1.2 Previous Work Summary <br /> Prior to 1979, two of the tanks (USTs#6 and#7) were removed from the site <br /> 1 <br /> On June 15, 1995, Fisch Environmental removed a 12,000-gallon gasoline tank (UST#3) from the <br />' area immediately west of the dispenser islands, and collected soil samples for laboratory analysis <br /> from beneath the former UST On June 29, 1995, based on the soil sample results, Fisch <br /> Environmental over-excavated the tank basin to a depth of approximately 27 feet and collected <br />' additional soil samples The over-excavation soil samples also contained elevated concentrations <br /> of Total Petroleum Hydrocarbons (TPH)-as-gasoline, and benzene, toluene, ethylbenzene and <br />' xylenes (BTEX) The soil sample locations are shown on Figure 2, and the analytical results are <br /> summarized in Table 1 <br />' During November 1998, the county public works department replaced USTs#1 and #2 with <br /> upgraded systems Advanced GeoEnvironmental collected soil samples from beneath the USTs <br />' and underground product piping The soil sample locations are shown on Figure 2, and the <br /> analytical results are summarized in Table 1 <br />' 5 <br /> 1 <br />