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• WORK PLAN FOR LYSIMETER INSTALLATION November 1995 Re-Manufacturing Ltd., Rental Machinery Co., Inc. and Stanley S. Moore 1825 Charter Way Stockton, California 1.0. INTRODUCTION In accordance with the request of Mr. Kit Bennett, Advanced GeoEnvironmental, Inc. (AGE) has prepared this Work Plan for the installation of lysimeters at 1825 Charter Way, in Stockton, California. The scope of work includes the installation of four suction lysimeters and the collection of four soil samples from the clay cap for permeability testing. The lysimeters will be installed within and around the former surface impoundment at the site. The location of the site is illustrated in Figure 1; a plan of the site is illustrated in Figure 2. , 2.0. BACKGROUND 2.1. SITE DESCRIPTION The site is located on an 5-acre property in southeast Stockton. Mormon Slough is located immediately north of the site. A former surface impoundment (Class I Landfill) is located in the northeast corner of the property, adjacent to Mormon Slough (Figure 2). 2.2. SURFACE IMPOUNDMENT An unlined surface impoundment (SI) was located at the northeast comer of the property and was created around 1970. According to the Central Valley Regional Water Quality Control Board (CVRWQCB), the SI was used by Re-Manufacturing to "dispose of steam cleaning wastewater." Constituents which were discharged into the SI included"solvents, acids, petroleum waste and steam cleaning wastewater." The SI was utilized as a discharge area until approximately 1979. However, waste water from the stream cleaning operation was discharged intermittently into the SI until 1988. In 1978, a Cleanup and Abatement (C&A) Order was issued to Mr. Stanley Moore by the CVRWQCB. Full compliance of the C&A was never achieved. In 1988, it was determined that the SI was subject to regulation under the Toxic Pit Cleanup Act (TPCA); compliance with the TPCA was requested. In 1989, an additional C&A Order was issued. 2.3. EXCAVATION AND DISPOSAL OF CONTAMINATED MATERIALS The C&A Order issued in 1989(No.89-708) ordered the removal and disposal of all sludge and soils