ARCHIVED REPORTS_XR0005287 - Laserfiche WebLink

Home Browse Search

SUBSURFACE SOIL AND GROUNDWATER ASSESSMENT REPORT UNIVERSITY OF THE PACIFIC 1081 W MENDOCINO AVENUE STOCKTON, CALIFORNIA ' Assessor's Parcel Number: 113-140-02 County of San Joaquin Site Code: R0732 INTRODUCTION Environmental Science Associates (ESA) has prepared this report to present findings of our ' subsurface soil and groundwater assessment at 1081 W Mendocino Avenue in Stockton, California(referred to herein as the"site")(Figure 1) The purpose of the assessment was to further investigate concentrations of methyl tertiary-butyl ether(MTBE)detected at a former ' underground storage tank(UST) location Assessment activities included dnllmg and sampling five exploratory soil borings and obtaining in-situ groundwater samples In addition, a well search was performed to identify any public water supply wells in the site vicinity This report is subdivided into four sections The Project Background section describes previous soil assessment activities on the site and a summary of the site history The Investigation and Findings section describes the results of our assessment and the findings used to develop our conclusions The Conclusions and Recommendations section discusses our conclusions based on the findings and presents our recommendations The Subsurface Soil and Groundwater Sampling ' Methodology section describes methodologies and procedures used in our assessment Table 4 summarizes the laboratory results of soil and groundwater sample analyses Soil boring logs and ' copies of laboratory reports are located in Attachment A and B, respectively PROJECT BACKGROUND ' The site is the former location of the University of the Pacific (UOP) Physical Plant on the north side of Mendocino Avenue within the UOP campus The UOP moved its main campus to its ' present location in Stockton in approximately 1924 The former Physical Plant building, Central Receiving Building, and Electric Shop located south, southeast and southwest of the site are being remodeled for use as classroom buildings UOP recently removed a Custodial Warehouse ' and a shed formerly located to the east of the site As part of current renovations and construction of new facilities,UOP removed a 4,400 gallon unleaded gasoline UST on April 7, 2000, under permits issued by San Joaquin County Environmental Health Division (#022179)and the City of ' Stockton Fire Department(#00-91) Excavated soil from the tank pit (including pea gravel and soil) was used as backfill The former UST location is now beneath a newly paved staff and student parking lot(Figure 2) ' Subsurface Soil and Groundwater Assessment ESA/200252 1081 W Mendocino Avenue,Stockton California 1 August 25 2000