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I CORRECTIVE ACTION PLAN and QUARTERLY GROUND NATER 1iONITORING - J Y 1995 Alarlois e Properties ' 4648 East NVaterloo Road Stockton, California �'�Y 9 April 1995 Fiy 1-995 I.O. INTRODUCTION AND SCOPE OF WORK In accordance with a request from Mr Jonathan Marlowe of Marlo,,ve Properties, Geological Audit Services, Inc (GeoAudit) conducted field activities consisting of ground water sampling/monitoring and vapor extraction pilot test at 4648 East Waterloo Road in Stockton, California The purpose of this investigation was to monitor impacted ground water and to evaluate the feasibility of vapor extraction as method of remediation Adi arced GeoEnvironmental, Inc (AGE) was subsequently retained by Mr Nlarloue to complete the report on field data collected by GeoAudit 20 B 1CKGROUID 2 1 SITE LOCATION The site is located on the south side of East NV iteiloo Road, east of Highway 99 in a generally flat rural/industrial area east of Stockton, California (Figure I - Location Map) A large «arehouse, a small office building, two fenced storayge }'trds and a park ingr delivery area are present on the site A site plan depicting the structures and location of monitoring wells is given as Figure ? 22 PREVIOUS WORK Following removal of a single 550-gallon gasoline underground storage tank, a release of petroleum hydrocarbons was disco\,ered in January 1988 A ground water monitoring well (MW-1) was subsequently installed southwest of the former UST location Petroleum hydrocarbons were detected in both soil and giound water samples collected from MAN'-I Due to decreasing water table, this well became dry In December 1992, GeoAudit was retained by Marlowe Properties to install one ground water monitoring well (MW-2) to replace MW-1 Petroleum hydrocarbons were not detected in soil samples collected during the construction of MW-2, however, benzene and halogenated hydrocarbons were detected in a tivater sample from MW-2 collected in January of 1993 i I