Laserfiche WebLink
California Regional Water Quality Control Board <br /> Central Valley Region <br /> Robert Schneider,Chair <br /> »Vinston H.Hickox Gray Davis <br /> Secretaryfor Sacramento Main Office Governor <br /> Environmental Internet Address: http://www.swrcb.ca.gov/rwgcb5 <br /> Protection 3443 Routier Road,Suite A,Sacramento,California 95827-3003 <br /> Phone(916)255-3000•FAX(916)255-3015 <br /> TO: Gordon Lee Boggs FROM: James Barton <br /> Underground Tank Program Manager Engineering Geologist <br /> CC: CoriCondon SIGNATURE: me— <br /> Senior Engineering Geologist <br /> Wendy Cohen <br /> Senior WRC Engineer <br /> DATE: 8 April 2003 <br /> SUBJECT: REQUEST FOR NO FURTHER ACTION, UNDERGROUND STORAGE TANKS, <br /> CENTRAL VALLEY CONSTRUCTION, 146 KLO ROAD, <br /> (AKA 12565 S. MANTHE Y R OAD),LATHROP, SAN JOA QUIN COUNTY <br /> Background— <br /> Hayre's Egg Producers, 12565 Manthey Road, Lathrop owned and operated four USTs: two 10,000- <br /> gallon gasoline, one 1,000-gallon gasoline, and one 1,000-gallon diesel tanks. All four tanks were <br /> removed on 1 August 1989 under San Joaquin County oversight. In 1998, Central Valley Construction <br /> subsequently purchased the portion of the Hayre's property that contained the UST area and an adjacent <br /> above ground tank(AGT) area. The property address was renamed 146 Klo Road, Lathrop, San Joaquin <br /> County. <br /> In March 2001, a consultant for Central Valley Construction, Inc. conducted a site investigation of the <br /> UST area and the AGT area. Soil samples collected in the UST area revealed TPHg(170 mg/kg) and <br /> TPHd (120 mg/kg). TPHd (14 mg/kg)was also detected at the AGT area. Grab groundwater samples <br /> showed impacts from the UST area by TPHd(21,000 µg/L.), TPHg (30,000 µg/L), benzene (27 �tg/L,), <br /> toluene (35 µg/L), ethylbenzene (14 gg/L), and xylenes (4.8 gg/L). Groundwater was not impacted by <br /> petroleum hydrocarbons in the AGT area. MtBE was not detected in soil or groundwater at either area. <br /> On 22 August 2001, approximately 200 cubic yards of soil was excavated from the UST area and the <br /> AGT area. Groundwater was encountered at 18 feet, the maximum depth of the excavations. <br /> Confirmation soil samples from the bottom of the excavations revealed low levels of contamination left <br /> in place at the UST area(TPHg, 1.5 mg/kg), and at the AGT area(TPHd, 450 mg/kg). Lead was not <br /> detected in groundwater at either area. Excavated soil was aerated onsite until contaminant levels were <br /> reduced to non-detect levels. <br /> California Environmental Protection Agency <br /> �a Recycled Paper <br /> The energy challenge facing California is real. Every Californian needs to take immediate action to reduce energy consumption. <br /> For a list of simple ways you can reduce demand and cut your energy costs,see our Web-site at http://www.swrcb.ca.govtrwgcb5 <br />