SITE INFORMATION AND CORRESPONDENCE

Home Browse Search

J&L Market 0 0 8125 South El Dorado Street -2 - 16 August 2001 Upgradient states that based on 1993 San Joaquin County Flood maps the depth to water was between 35 and 40 feet in 1993. 9" SJ County Flood maps show the depth to water is between 20 and 30 feet. Therefore, se�t he release, the lack of MtBE data, and the rise in regional groundwater levels, a groundwater investigation is required. By 24 September 2001, please submit a plan of work to define the lateral and vertical extent of soil and groundwater contamination remaining at the subject site. All work must be performed according to the Tri-Regional Staff Recommendations for Preliminary Investigation and Evaluation of Underground Storage Tank Sites. The plan of work must contain a proposal to complete a minimum of two soil borings and collect soil and groundwater samples. One boring should be placed near the former dispenser where soil sample P-3 was collected, and one should be placed west of soil sample locations P-13 and P-15 outside the excavation area. A minimum of one soil sample from each boring must be analyzed for TPHg and BTEX by EPA Method 8015/8020, for MtBE, TBA,DIPE, TAME, ETBE, ethanol, methanol, 1,2-dichloroethane, and ethylene dibromide by EPA Method 8260B, and for lead by EPA Method 6010. All groundwater samples must be analyzed for TPHg,BTEX,MtBE, TBA, DIPE, TAME, ETBE, 1,2-dichloroethane, and ethylene dibromide by methods listed above. The plan of work must also include well construction details for the on-site domestic well,and the on-site domestic well must be shown on future site plans and maps. If you have any questions, please call me at(916) 255-3115. Marty Hartzell Associate Engineering Geologist cc: Mr. Mark Owens, UST Cleanup Fund, SWRCB, Sacramento Mr. Mike Infuma, San Joaquin County Environmental Health Division, Stockton Mr. Victor B. Cherven, Upgradient Environmental, Sacramento l