ARCHIVED REPORTS XR0006888 - Laserfiche WebLink

Home Browse Search

x gmcon 1433 North Market Boulevard • Sacramento California 95834-1943 • (916)928-3300• Fax(916)928-3341 i October 26, 1995 Project OF90-002 04 Mr George Takemon A Tetchert &Son, Inc Equipment Administrator P O Box 15002 Sacramento, California 95851 Re Third Quarter 1995 Status Report for A Teichert & Son, Inc , Facility, Located at 103 North E Street, Stockton, California Dear Mr Takemon At the request of A Tetchert & Son, Inc (Teichert), EMCON is conducting an environmental investigation at the subject site (see Figure 1) We have prepared this status report on the work conducted during the third quarter 1995 Work included conducting groundwater monitoring and operation and maintenance of the remediation system Groundwater monitoring consisted of measuring depths to groundwater, collecting groundwater samples from each well for subjective . and laboratory analyses, measuring thickness of floating product (if present) in the wells, and evaluating the groundwater gradient and direction of groundwater flow beneath the site Operation and maintenance is performed on the remediation system and consisted of collecting and evaluating performance data from the remediation system BACKGROUND Two 5,000-gallon gasoline underground storage tanks (USTs) and one 1,000-gallon waste-oil UST were removed from the Teichert equipment site in October 1986 (EMCON, Problem Assessment Report and Final Remediation Plan, December 16, 1992) These tanks were not replaced In September 1987, overexcavation of the impacted soil near the former tank complex was completed Based on safety and sidewall stability considerations, the overexcavation was terminated at a depth of approximately 38 feet below ground surface (bgs) As a result, residual concentrations of petroleum hydrocarbons remained in the soil at the north-central side of the excavation where the pump island was located, at the bottom center of the tank excavation (38 feet bgs), and near the northwest corner of the excavation In August 1988, a 10,000-gallon-capacity regular gasoline storage tank was removed (EMCON, Problem Assessment Report and Final Remediation Plan, December 16, 1992) Two soil samples were collected from the tank excavation for laboratory analysis One of the samples contained detectable concentrations of benzene, toluene, ethylbenzene, and xylenes (BTEX) BTEX was not . detected in the other sample, and total petroleum hydrocarbons as gasoline (TPHG) were not detected in either sample In September 1988, the area was overexcavated Confirmation soil samples were collected from the bottom of the excavation Petroleum hydrocarbons were not detected in any of the confirmation soil samples collected dung this overexcavation activity SAC1N PJOIOF9010F900420 4DS-95 PAS