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Shallow Disposal Well Closure Report WESTERN SQUARE INDUSTRIES Y 1621 North Broadway, Stockton, California 1.4. INTRODUCTION At the request of Mr. Warren Snider of Western Square Industries,Advanced GeoEnvironmental, Inc. (AGE)has prepared this Shallow Disposal Well Closure Report for the site located at 1565/1621 North Broadway, Stockton, California. The location of the site is illustrated on Figure 1. A plan of the site is illustrated on Figure 2. This report was prepared as required by the San Joaquin County Public Health Services - Environmental Health Division (PHS-EHD) and in accordance with USEPA Region 9 Guidelines for Closure of Shallow Disposal Wells - 1992 for the closure of shallow disposal wells at the property. 2.0. BACKGROUND The site is located in a light-industrial area of eastern Stockton, San Joaquin County, at an elevation between 25 and 30 feet above mean sea level. The site is presently occupied by Western Square Industries, a steel fabrication facility. 2.1. SITE OPERATIONS AND WASTEWATER GENERATION Western Square Industries (WSI) fabricates custom steel items(fencing, truck railings) and has been located at the site for approximately 12 years. The facility consists of manufacturing, painting, steam wash line, cleaning and shipping areas. Prior to 1999, waste water from the steam cleaning area drained into a clarifier. Water from the clarifier was then pumped back into a recycling unit and re- utilized in the three-stage wash line. The three-stage wash line and clarifier were cleaned and pumped periodically. The clarifier utilized at the site was a steel-constructed industrial waste water recycling system manufactured by Ultrasorb Systems. The unit was operated above-ground and had approximately 300 gallons capacity. Waste water from the steam cleaning operation was pumped from the sump within the steam cleaning area to the recycling system. The water was then recycled into the wash rack system; solids from the recycling system were containerized and disposed in an appropriate manner. Only waste water generated in excess of recycling capabilities was discharged into the disposal wells. _ In approximately 1996, WSI developed a new product line not accommodated by the three-stage wash line. Therefore,use of the steam cleaner increased, exceeding the capacity of the clarifier. After increasing the use of the steam cleaning facility, more water was being stored than used. Advanced GeoEnvironmentat,Inc.