WORK PLANS - Laserfiche WebLink

Home Browse Search

N i w f1 Site Background Information: Stallworth Auto Sales i Page 8 of 9 Hydrogeologic Unit 6 (HU6) - extends from 131 feet to 161 feet bsg; the unit is predominately silt and clay with laterally discontinuous sands to sandy silts; HU6 is characterized by low to moderate pore pressure. Hydrogeologic Unit 7 (HU7) - extends from 161 feet to 177 feet bsg; the unit is characterized by a thick sand interval on the eastern edge of the site which appears to transition to interbedded stiff fine grained soil, clays and silts towards the west. Pore pressures in HU7 range between low pressures in the sand interval to moderately low to moderate in the finer-grained soils. Hydrogeologic Unit 8 (HU8) - extends from 177 feet to 190 feet bsg; HU8 consists primarily of silt and clay; the unit is characterized by moderately low to moderate pore pressures . Hydrogeologic Unit 9 (HU9) - extends from 190 feet to 195 feet bsg; the unit is a silty sand to sandy silt layer characterized by low and some moderate pore pressures . Hydrogeologic Unit 10 (HU10) - extends from 195 feet to 200 feet bsg, HU10 is predominately silt and clay; the unit is characterized by moderate and some low pore pressures. SENSITIVE RECEPTOR SURVEY A sensitive receptor survey was conducted for the site. The area encompassed by the 2000400t search radius and the water wells located during the search are depicted on Figure 3 in the AGE- prepared Sensitive Receptor Survey, dated 12 January 2001 . Drinking water at and near the site is supplied by the City of Stockton municipal well system. The municipal wells in the site area are maintained by the California Water Service Company (CWSC). CWSC stafionnumbers (wells) 42-01 and 53-01 areboth locatedwithin 2,000 feet of the subject site. Water well 42-01 was located on East Poplar Street between San Joaquin Street and Hunter Street, approximately 1 ,500 feet northwest of Stallworth Auto Sales. Water well 42-01 was completed to a total depth of 450 feet below surface grade (bsg). AGE was unable to discover screen interval for water well 42-01 . According to Eric Maar of CWSC, well 42-01 was abandoned in the 1970's. Well 53-01 is located on North Aurora Street between Lindsay Street and Fremont Street, approximately 1 ,500 feet east of the subject property. Water well 53 -01 is completed to a total depth of 564 feet bsg with a 278400t screen interval from 252 feet bsg to 530 feet bsg. On 01 December 2000, a representative of AGE performed an area reconnaissance for visually observable potential receptors within a 2,000-foot radius of the site. No additional municipal, irrigation, agricultural, federal or countywater wells were located during the visual search. However, 21 ground water monitoring wells were observed at 4 different locations. Advanced GeoEnvironmental, Inc. i