ARCHIVED REPORTS_XR0005225 - Laserfiche WebLink

Home Browse Search

�►i G V4%TC • A S S O C I A T E S 1 N C , 4.2 General C-SpargeTM Remediation System Description 4.21 C-SpargeTM System Equipment Description The C-SpargeTM system became operational on June 17, 2004. Figure 11 shows the remediation system compound location as well as the injection and groundwater monitoring well network for the Jamar property. The C-SpargeTM remediation system at the Jamar property consists of a KVA C-SpargeTM System Series 5030 model. This includes a small profile Master Unit (43"w x 29.5"h x 12"d, 120 lbs) which has a capacity of serving up to twelve (12) Spargepoints® sequentially but is currently serving 10 Spargepoints®. Figure 12 is a general process and instrumentation (P&ID) diagram for the Jamar property remediation system. Two sparge points are installed in each of five injection wells (IW1 through IW5) at the Jamar property. Each of the eight-sparge points in IW1 through IW4 is on separate injection intervals. The two-sparge points in IW5 are combined together. 03 is injected sequentially in each of the 8 separate sparge points at eight-minute intervals and for 16 minutes at the combined sparge point • in IW5. This is 80 minutes for all sparge points combined with one shut-off period for 10 minutes after all intervals are completed or ninety minutes for a complete cycle including the shut off period. If the system is fully operational (i.e., no unscheduled down time) each sparge point is operated 16 cycles per day. This is a total of 128 minutes per day for injection at each of the eight separate sparge points (for IW1 through IW4) and 256 minutes for the combined sparge points at IW5 or a total system operation of 1280 minutes per day (Table 3). The maximum delivery rate for 03 from the C-Sparge system at the Jamar property is 4 grams per hour. This equates to approximately 0.002204622 pounds per hour. The injection rates for the system range between 2.0 and 3.0 standard cubic feet per minute (SCFM) based on the manufacturer's specifications. 4.2.2 Remediation Well Description Table 4 includes a summary of the injection well completion data for the Jamar site. Figure 13 is a general well completion diagram for the injection wells. The general construction of the C- SpargeTM wells consisted of a 3/4 inch inside diameter (ID) blank casing coupled to a 1" ID - 30" long ozone diffuser. Within each injection well, two sparge points were set. The tops of the sparge points in all inJ ection wells (IW1-IW5) were set at approximately 71.5 and 105.2- feet below ground surface (bgs). The isolated Spargepoints® are separated by approximately 31.2 feet in each injection well. The base of the shallow ozone diffuser is at approximately 74.0 feet bgs and the top of the lower ozone diffuser is at approximately 105.2 feet bgs. These ozone diffusers were placed in an eight-inch diameter hole. SA268231QM reports12004 4QR.doc 6