FIELD DOCUMENTS - Laserfiche WebLink

Home Browse Search

• • Mr. Harlin Knoll ' May 9, 2002 Page 2 of 3 push rig to advance the borings and collect soil samples. Soil samples were collected at 5-foot us a 13/a inch diameter by 24-inch long core sampler The valuation sampler was lined with contamination.clear A intervals g acetate sleeves, affording soil identification and subjective e ounds in photoiomzatio n detector (PID) was used to monitor the presence of volatileorganic omediately placed in the soil. Soil samples collected from each °of g4oC r for transport to a state-certified analytical on an ice chest refrigerated to a temperature laboratory under chain of custody protocol. Soil samples selected for analysis were ase observations and field screening results. The completed borings were backfilled to the ground surface with neat cement grout. No soil generated. All down-hole drilling and sampling equi nt Boriwas ngclocations are ontaminated cuttings were g rade detergent and rinsing with water by washing with a laboratory g shown on Figure 2. Soil boring logs are included in Attachment B. three soil samples were analyzed by Argon Laboratories (ELAP #2359) for gasoline A total oft hydrocarbons as gasoline oxygenate additives using EPA method 8260,toluene, ethylbenzene, xylenes (BTEX) using (TPHg) using EPA method 8015M, benzene, EPA method 8020, and total lead using EPA method 7420. RESULTS OF INVESTIGATION 1 from the ground surface to approximately 15 feet bgs was al soillds olorationsas silt. nore rlying the Soil silt, a bed of silty clay extends to at least 21 feet bgs. No abnormal h drocarbon odors were noted, and PID readings were at background levels in all samples collected y from both borings. Soil boring logs are included in Attachment . No TPHg, BTEX or gasoline oxygenate additives were detectedilin amdhe lessoil samples collected from rranged from 11 parts per borings SBI and SB2. Total lead concentration m the s p million (ppm) to 13 ppm, which are naturally-occurring levels. Analytical results of soil samples are summarized in Table 1. Laboratory reports and chain of custody documentation are included in Attachment C. SUMMARY Two soil borings were drilled and sampled in the former tankpit area. Soil in the investigation area was classified as silt and silty clay. No abnormal soil discoloration, petroleum hydrocarbon odors or elevated PID readings were noted in either boring SBI or SB2. No TPHg,s were conTEX s stent owrth line oxygenate additives were detected in soil samples and lead concentrations naturally occurring levels. \\GZA FS\SYSOl\Data\GROUNDZE\KRETH\swnletter.doc