COMPLIANCE INFO - Laserfiche WebLink

Home Browse Search

Preliminary Site Investigation Work Plan Former GLOBAL MATERIALS MANAGEMENT 1640 Broadway Avenue, Stockton, San Joaquin County, California 1.0. INTRODUCTION At the request of the property owner Mr. William Johns, Advanced Geo Environmental, Inc. (AGE) has prepared this Preliminary Site Investigation Work Plan (Plan) for the property located at 1640 Broadway Avenue, Stockton, California (site). A site map depicting site features, approximate soil excavation areas, soil sample locations, and proposed soil trenching (excavation) locations is presented in Figure 1. The property is a 0.94-acre rectangular parcel with two main structures, on the western edge of the site. The area of concern is located in the south-central area of the site. 2.0. BACKGROUND Global Materials Management (GMM) was a used oil filter recycling business. Gross contamination was visually observed on the property in the area utilized for waste oil recovery and crushing and storing of used oil filters prior to recycling. Approximately 70 yards of contaminated soil was excavated and removed from the site in 2017. The soil was transported and disposal as non-RCRA hazardous waste. During a site inspection by SJCEHD in January 2018, the gross contamination visually appeared to be removed. However, because of previous contamination noted on the property, four soil samples were collected during the site inspection to evaluate and confirm remediation of the soil contamination (ID-1 through ID-4). All four soil samples exhibited residual contamination. An elevated level of total lead (Pb) was detected in one soil sample (ID-1) at a concentration of 450 milligrams per kilogram (mg/kg). Soluble Threshold Limit Concentration (STCL) analysis of sample ID-1 detected Pb at a concentration of 45.9 milligrams per liter(mg/1),which exceeds the hazardous waste characterization threshold. A copy of the analytical lab report is included in Appendix A. Based on the results of the soil sample analysis, the San Joaquin County Environmental Health Department (SJCEHD) prepared a Waste Discharge/Spill Response Notice to Abate letter dated 20 March 2018 (Appendix A). The letter directs investigation and abatement of the remaining contamination. This work plan was prepared as required by the SJCEHD letter to investigate and subsequently abate the remaining soil contamination at the site. 3.0. SCOPE OF WORK Based on data collected during previous sampling and remediation excavations performed at the site, AGE proposes to excavate five soil trenches, for soil sample collection, within and surrounding the former waste storage area to further investigate the